SolidWorks Flow Simulation Software Research Articles

Simulation of a Heat Transfer Mechanism in a Shell and Tube Coil Heat Exchanger

Statement of the problem. The mechanism of heat exchange between counterflow circuits in a shell-and-tube coil heat exchanger, inside which heating and heated coolants flow, is discussed. It is required to build computer models of the movement of coolants in different operating conditions, to simulate the mechanism of heat exchange in the countercurrent mode of movement of coolants in a shell-and-tube coil heat exchanger. This problem was solved in the Solidworks Flow Simulation software package. Results. A mathematical model of the heat exchange process in a shell-and-tube coil heat exchanger was obtained with visualization of the mechanisms of coolant movement inside the heating and heated circuits. Conclusions. Based on the simulation results, a comparison was made of various computer models of the apparatus obtained. The optimal design has been determined.

NUMERICAL HEAT TRANSFER ENHANCEMENT OF SOLAR RECEIVER TUBE OF PARABOLIC TROUGH COLLECTOR USING FIBERFRAX 140 COATED WITH AL 2O 3

Parabolic trough collectors (PTCs) play a vital role in solar-thermal energy conversion, with the absorber tube being central to heat collection efficiency. This study investigates the potential for improving heat transfer within the PTC absorber tube using Fiberfrax 140 coated with Al 2O 3 as a novel reflector material. The research is driven by the ongoing pursuit of enhanced PTC performance. A standard modeling approach was employed, utilizing Computational Fluid Dynamics (CFD) analysis with SolidWorks Flow Simulation software, coupled with solar simulations to assess collector performance under varying conditions. Environmental parameters of Bauchi such as temperature, humidity, and wind speed were sourced from the Nigerian Meteorological Agency (NiMet). Optimization techniques were implemented to establish the optimal design configuration. The optimal design parameters were determined as a focal length of 700mm and a rim angle of 90°. Simulations were conducted daily from 8:00 AM to 5:00 PM, encompassing the period of January to June. A mass flow rate of 0.2 kg/s, informed by existing literature, was employed in the simulations. The results indicate improved collector performance throughout the simulated period, with peak thermal efficiency ranging from70%to82%.

Flow Simulation Study on Bed Bath for Bedridden Patient

Easy tasks such as showering or bathing independently are impossible for a bedridden individual. This paper presents a comprehensive study on designing an easy shower specifically tailored for bedridden patients. The challenges bedridden individuals face in maintaining personal hygiene are highlighted, emphasizing the importance of a suitable bathing system to enhance their quality of life. The proposed design aims to address these challenges and improve caregiving efficiency. The chosen methodology involves a weighted decision matrix to select the optimal design, followed by flow simulation using SolidWorks Flow Simulation software to evaluate its performance. The paper's objectives include designing an efficient easy shower model, assessing its performance via simulation, and analyzing the impact of various velocity settings on its functionality. Three design concepts were proposed, with Design A selected as the optimal choice due to its lightweight, high water capacity, ease of handling, and low production cost. Modifications were made to enhance its water pressure efficiency. The simulation encompassed different velocity settings, with flow trajectories analyzed within the tank and at the water outlet. These boundary conditions included analysis type (internal), fluids (water), default wall thermal condition (adiabatic wall), pressure (101325 Pa), temperature (293.2 K), and velocity in the Y direction (5 m/s for water inlet and 0.5 m/s for water outlet). In the first simulation, all the results obtained were within the specified velocity range of 0.5 m/s, 2 m/s, and 5 m/s. The analysis of flow trajectories revealed distinct flow patterns and velocities for different velocity values, indicating stable and controlled environments within the tank and efficient water discharge through the outlet in Design A. However, errors were observed in the water outlet simulation due to the presence of vortices, which impacted the results. Recommendations were made to address these challenges, such as modifying the design to eliminate or minimize vortex effects. In conclusion, this study contributes to the well-being of bedridden patients by proposing an improved bathing mechanism, enhancing caregiving efficiency, and offering insights into design optimization and simulation challenges. The proposed design could have a significant positive impact on the lives of bedridden patients and caregivers.

МОДЕЛИРОВАНИЕ ПРОЦЕССОВ ТЕПЛОМАССООБМЕНА В РЕКУПЕРАТОРЕ ТИПА «ТРУБА В ТРУБЕ»

Recuperators including heat exchangers of various types are considered. The prospects of using pipe-in-pipe heat exchangers for the utilization of thermal emissions containing significant amounts of moisture and gas emissions, for example, ammonia, which is typical for livestock complexes, are shown. When heat carriers come into contact with different temperatures, moisture vapors condense on the walls of the heat exchanger and gaseous ammonia dissolves in it. The removed air is supplied to the inner pipe, condensate in the form of ammonia water is removed at the bottom of the installation, and the cooled and purified air is discharged through the upper branch pipe into the atmosphere. Based on the theory of similarity, a model setup has been developed. With the help of the SolidWorks Flow Simulation software package, the influence of hydrodynamic and thermophysical properties of heat carriers on heat and mass transfer processes was studied. The temperatures of the cold coolant ranged from -5 to -23 ° C, (outside air), the temperature of the thermal coolant (exhaust air) is +25 ° C. It was found that in order to avoid freezing of the inner surface of the heat exchanger, the temperature of the air supplied to the outer pipeline should be above -10 ° C. To increase the heat transfer coefficient, it is advisable to supply heat carriers tangentially. At the same time, it is desirable to maintain the same coolant velocities in the supply and exhaust connection pipes of the installation. To increase the energy efficiency of the installation, it is recommended to develop and improve methods for turbulizing coolant flows.

МОДЕЛИРОВАНИЕ ПРОЦЕССОВ ТЕПЛОМАССООБМЕНА В РЕКУПЕРАТОРЕ ТИПА «ТРУБА В ТРУБЕ»

Recuperators including heat exchangers of various types are considered. The prospects of using pipe-in-pipe heat exchangers for the utilization of thermal emissions containing significant amounts of moisture and gas emissions, for example, ammonia, which is typical for livestock complexes, are shown. When heat carriers come into contact with different temperatures, moisture vapors condense on the walls of the heat exchanger and gaseous ammonia dissolves in it. The removed air is supplied to the inner pipe, condensate in the form of ammonia water is removed at the bottom of the installation, and the cooled and purified air is discharged through the upper branch pipe into the atmosphere. Based on the theory of similarity, a model setup has been developed. With the help of the SolidWorks Flow Simulation software package, the influence of hydrodynamic and thermophysical properties of heat carriers on heat and mass transfer processes was studied. The temperatures of the cold coolant ranged from -5 to -23 ° C, (outside air), the temperature of the thermal coolant (exhaust air) is +25 ° C. It was found that in order to avoid freezing of the inner surface of the heat exchanger, the temperature of the air supplied to the outer pipeline should be above -10 ° C. To increase the heat transfer coefficient, it is advisable to supply heat carriers tangentially. At the same time, it is desirable to maintain the same coolant velocities in the supply and exhaust connection pipes of the installation. To increase the energy efficiency of the installation, it is recommended to develop and improve methods for turbulizing coolant flows.

Effect of the Configuration and Shape of External Ribs of Sealed Enclosures of Electronic Devices on Heat Removal Efficiency

Introduction. Modern computing and electronic devices are constructed on the basis of radio-electronic components, such as processors, graphics processing units, etc. During operation, these components emit tens of watts of thermal energy. Therefore, effective excess heat removal from both semiconductor electronic devices and electronic systems as a whole through the use of passive or active cooling systems represents an important research problem. Aim. To study the influence of the configuration and shape of external ribs of sealed enclosures of electronic devices, which use solely passive cooling systems inside, on the efficiency of heat removal from the processor for eachenclosure design under consideration based on their comparative analysis. Materials and methods. Simulation experiments were carried out using 3D parametric models of various device types, which were developed in the SolidWorks Flow Simulation software environment. These models differed in terms of configuration of thermal channels formed by the external enclosure ribs. Results. The conducted simulation experiments allowed the authors to study the cooling process of processors installed in modern electronic devices. The influence of the configuration and shape of the enclosure ribs on excess heat removal from the processor was studied in a passive cooling mode and when blowing the devices with air moving from above (perpendicular to the cover) or laterally (parallel to the cover) with a gradual increase in a processor power from 10 to 25 W. A ribbed enclosure with passive cooling was shown to ensure a more effective heat removal from a 10 W processor compared to a non-ribbed enclosure (the temperature drop is 4.1 °C). For a 25 W processor, this value comprises 11.01 °C. When blowing the device, the direction (perpendicular or parallel) of air movement significantly affects the cooling efficiency of the heated surface (with a processor power of 45 W, the difference is more than 10 °C). Conclusion. The developed 3D models effectively simulate the cooling system of heat-loaded high-power radio-electronic components located in sealed enclosures, due to the implementation of their external ribbing.

The use of numerical simulation in the analysis of aerodynamic problems in transport

The study of the aerodynamic impact of rolling stock on the railway infrastructure is carried out either with experimental methods or with numerical simulation methods. The use of numerical simulation methods allows you to safely and quickly obtain the necessary data. An important task is to determine the factors that affect the aerodynamics of the rolling stock. To study aerodynamic processes in transport it is proposed to use the Frozen Rotor method in combination with the Large Eddy Simulation, which can be implemented using the Solid Works Flow Simulation software package. This method makes it possible to obtain a high-quality picture of the distribution of air flows in the boundary and main layers.

Influence of Channel Orientation in Air Coolers on the Efficiency of Heat Removal from Powerful Semiconductor Devices

The results of the study of air-cooled coolers with natural and forced heat removal from such powerful semiconductor devices as processors are presented. Experiments were performed in the SOLIDWORKS Flow Simulation software environment to assess the influence of the orientation of the formed thermal channels on the efficiency of heat removal from the surface of a heat-loaded element. Three-dimensional models of tower heatsinks with an installed fan and a supporting structure in the form of heat pipes penetrating fins that form horizontal (model No 1) or vertical (model No 2) air channels have been developed, which made it possible to determine the efficiency of heat removal from the processor during natural and forced convection. The developed model No 1 was rotated by 90°, which may be due to design requirements in the development of technical means. This led to a change in the movement of warm air during natural and forced convection along the vertically directed channels with an analysis of the effectiveness of passive and active cooling. The number of heat pipes has been changed from six to two for previously developed types of radiators (models No 1 and 2), only with active cooling. This made it possible to experimentally establish the influence of design solutions (the number and orientation of heat pipes) in the production of modern air-cooled coolers on the efficiency of heat removal.

Investigation into the Flow of Gas-Solids during Dry Dust Collectors Exploitation, as Applied in Domestic Energy Facilities – Numerical Analyses

The paper presents the results related to the simulation of dust-separating tangential cyclones: single cyclones of various geometries, and an axial multi-cyclone with fixed geometries and components. Its goal was to apply low-cost analyses for cyclones in industrial realization. Therefore, the presented research was applied with simulation methodology as a problem of Computational Fluid Dynamics. The models were analyzed using SolidWorks Flow Simulation software. The presented dust collectors are real-life objects, applied in industrial facilities. For a multi-cyclone, the increase in the number of blades, from 5 to 8, together with the change in the angle of a blade’s pitch i.e., 30° and 45°, resulted in dust concentration along the internal walls from just 10% for 5 blades up to c.a. 37.5% for 6 blades, and c.a. 50% for 8 blades, whereas the dust concentration in the device’s central part equals c.a. 20% for the last option. The model validation draws attention to the potential applicability of the software in flow issues alongside common and more complex numerical environments.

Thermo-hydraulic efficiency enhancing: Optimized ladder fold baffle structure with cam and circle tube bundle

In this article, the design and thermo-hydraulic efficiency of a shell and tube heat exchanger (STHE) having ladder fold baffle equipped by two configurations with pore and without pore considering two types of tube bundles, cam and circular, are investigated numerically. Three-dimensional STHE is simulated employing the Solid Works Flow Simulation software. A numerical approach is performed for different values of mass flow rate from 0.5 to 2 kg/s, baffle height of 0, 20, and 40, and baffle pitch of 85.7, 60, and 46.15. STHE pressure drop, heat transfer, and efficiency evaluation coefficient (EEC) for different arrangements have been performed to study the STHE fluid flow and heat transfer. Obtained results for a ladder fold baffle and two studied types of tube bundles, cam, and circle, are provided, and thermo-hydraulic performance is compared with the current baffle structure. Based on the obtained results, an increase of 12.2% and 17.4% in pressure drop with increasing baffle height from 0 to 20 mm and from 20 to 40 mm was observed for circular tube bundles without pores, respectively. Related values for the case with pore are 14% and 14%. These values for the cam tube bundle are 12% and 15% without pores and 3% and 9% with pores. In addition, at an angle of 0, 20, and 40° in the case without pore, the EEC factor increased by 2.31%, 15.67%, and 15.47% compared to the case with pore for the cam tube bundle. The perforated ladder fold baffle showed the best performance with pitch and height of 85.7 mm and 40 mm, respectively.

Ways to improve the efficiency of cooled radiators of electronic equipment manufactured using deep drilling technology

This article discusses the option of increasing the thermal efficiency of cooling radiators for electronic equipment manufactured using deep drilling technology. It is proposed to use electrical discharge machining technology to increase the efficiency of deep drilling channels. In a plate made of aluminum alloy, round holes are drilled along the entire length of the workpiece. Then wire for electrical erosion processing is fed into the round hole, which makes it possible to obtain a cross-section with a larger heat transfer area. The article discusses five options for sections of increased area. The heat removal efficiency for each of the cooling channel cross-section options was considered by modeling in the Solid Works Flow Simulation software environment. Distilled water was used as a coolant. The volumetric coolant flow rate is 0.8 liters per minute. The coolant temperature and the ambient temperature are equal to 25 degrees Celsius. The study considers a 30-watt thermal equivalent. The simulation results show that an increase in the heat exchange area in cooled radiators makes it possible to reduce the thermal equivalent temperature in a steady state, which indicates an increase in the thermal efficiency of the radiator. To confirm the modeling results, test the manufacturing technology and use of radiators with deep drilling, a thermal mock-up was made. Tests of the thermal model were carried out under conditions that best corresponded to the modeling conditions. A comparison of the results of modeling and experiment shows that the values obtained as a result of the experiment exceed the values obtained from modeling in all cases. The excess value ranges from 4.7 degrees to 7.4 degrees and is associated with the presence of an air gap between the copper plate and the radiator plate, the actual value of which exceeds the value of the calculation model. Analysis of the research results shows that the considered method of refining cooling channels obtained by deep drilling does not allow obtaining a qualitative increase in efficiency; the difference between the best and worst results does not exceed 3°C. The benefits obtained by this modification amount to a few degrees, which indicates the limited use of this method.

Particularities of the formation of the air masses structure in the tunnel during the train movement

The effect of aerodynamic factors on the rolling stock and railway infrastructure has been analysed. The formation of air mass structure in tunnel structures during the movement of high-speed rolling stock has been investigated. The processes of aeroelastic interaction of rolling stock with tunnel portal structures are analysed by means of numerical simulation. The description of mathematical models and the ways of their three-dimensional realization in the Solid Works Flow Simulation software complex are presented. Methods of finite elements and volumes for the solution of the set tasks are used. The results of the numerical research of velocity fields near the tunnel portal area obtained with the help of the developed mathematical models for the cases of entry and exit of the rolling-stock into the tunnel are given. The complex structure of air masses formation in the gap between the train body and tunnel lining which leads to increased resistance to the train movement in the tunnel is revealed. The patterns in the changes of pressure dynamics on the surface of the head fairing when the train enters the tunnel are found. The fact of negative effect of high and low pressure zones, as well as their abrupt difference, on the locomotive crew and passengers has been established.

PAXTA TOZALASH KORXONALARIDA HAVO OQIMINI CHANGDAN TOZALOVCHI AGREGAT KONSTRUKTSIYASINI TAKOMILLASHTIRISH

A detailed analysis of cyclones for cleaning dusty air coming out of ginneries has been provided in this article. The composition, temperature and speed of the dusty airflow coming out of ginneries have been studied. Depending on the composition of the dusty air, a new unit has been developed with a number of improvements up to the cyclone separator. With the help of the SOLIDWORKS Flow Simulation program, a new model for the design of a unit for cleaning a dusty air flow in a cyclone was developed, and a unit with the highest cleaning efficiency was selected among the new developed models. The design of an improved new cyclone separator unit has been simulated using SOLIDWORKS Flow Simulation software and the results were obtained. The design values of speeds in the SOLIDWORKS Flow Simulation model were theoretically calculated using the Navier-Stokes equations. The pressure, temperature, speed, on their basis, the dynamic viscosity of dust particles inside the unit have been studied, and the results have been obtained.

Strength Analysis on Horizontal Axis Wind Turbine Propeller Blade PVC Pipe with Angled Ends

The basic problem of appropriate wind energy technology is how to design wind turbines from materials that are easily available on the market, one solution is PVC pipe as the blade material. For this reason, it is necessary to analyze the working stress that occurs in the blade construction, so that the PVC pipe propeller wind turbine is safe when applied in society. The purpose of this study was to determine the effect of wind speed and tip elbow width on working stress. The simulation test method uses SolidWorks Flow Simulation Software and then the results are exported to Static Simulation to determine the strength of the material. Simulation tests were carried out with wind loads on PVC pipe propellers with wind speeds of 5 m/s, 6 m/s, and 7 m/s and elbow tip widths of 100 mm, 110 mm, and 130 mm. The results of the maximum stress value in the wind turbine simulation test with the addition of an elbow tip were obtained at a wind speed of 7 m/s and an elbow tip width of 130 mm

Simulation of a flat solar collector with thermal storage for drying food

This research addresses the numerical simulation of a working fluid, using specialized SolidWorks Flow Simulation Software, analyzing the behavior of a drying air in a flat solar collector with thermal energy storage. In addition, one of the main centers of computational study is the relationship between flow, air temperature at the outlet of the collector and efficiency; This study allows researchers a vision of the principles of the design of these technologies, especially if it focuses on the drying of food. Then, a proposal is made on the requirements to be taken into account for the sizing of collectors based on the requirements of the product to be dried. Among the results obtained, it is established that a correctly designed collector and under a variable air flow, based on the intensity of the irradiation in specific coordinates and location, can reach efficiencies close to 30% with temperatures close to 60 ° C, being ideal for injecting this fluid into a drying chamber, where the food to be dehydrated is available. For the selection of the volume of the material for energy storage, it is recommended to take the melting temperatures as a base, with a constant flow of air, it is normal that within the system, the temperature varies depending on the position, therefore it is recommending the application of materials with different melting temperatures, which are strategically located within the storage tank.

Noise Reduction of Gas Turbine Unit Gas Paths by Lining Their Turns

Specific features of reducing the noise emitted from gas turbine unit (GTU) gas paths by lining their turns are analyzed. This problem is relevant for high-capacity GTUs when their gas paths cause exceeding of sanitary standards in the surrounding area. Methods for reducing the noise of gas paths by using various types of silencers are considered. One of the methods is to line the GTU exhaust path turns with sound-absorbing material. The noise suppression effect obtained from the lining of gas paths turns is compared with the effects obtained from using the known methods. It is shown that the lining of gas path turns allows the noise level to be additionally reduced while featuring the minimal pressure drop in comparison with that in using other silencers. A technical solution for reducing noise by lining for GTUs is given. The additional noise level reduction obtained in the case of lining the GTU gas path turn with sound-absorbing panels was up to 8 dBA. For the GTU exhaust paths in which the flow velocity in the gas conduits is 30–50 m/s at temperatures of 300–450°C, the efficiency decreases by 12–20%, respectively, for the above-mentioned velocity variation limits. To determine the pressure drop in turns of a complex shape, which are encountered in real GTU paths, mathematical simulation was used. For the problem considered, the simulation was carried out in the Solidworks Flow Simulation software, using which the pressure drop values were determined. Methods for additionally decreasing the pressure drop across the lined turn by fitting it with non-profiled blades were analyzed. It has been found that the installation of non-profiled blades in a direct turn makes it possible to reduce the turn pressure drop coefficient by 1.63–1.7 times in comparison with the original version and by 2.5–2.6 times in comparison with the lining without the use of blades. The effect the number of blades has on the turn pressure drop was studied. It has been shown that with increasing the number of blades from 3 to 4, the local pressure drop coefficient remains almost unchanged.

SolidWorks flow simulation software potential in hydrodynamic processes analysis for cone vortex emulsion

The purpose of this work is to compare the hydrodynamic data of the real flow simulated by SolidWorks Flow Simulation in an emulsor of vortex type. The object of the study is an emulsion, in the central part of the energy separation chamber of which a zone of low pressure, the cavitation zone, is created. In this zone the dispersion phase collapses. Computer simulation of fluid dynamics of the emulsification process has been suggested to optimise the design of this type of emulsor. To check adequacy of results of modelling and real process, visualization and comparative evaluation of shape of flows at pressure of liquid at the inlet 0.4 MPa and its kinematic viscosity 10−6 m2/s. The use of SolidWorks Flow Simulation software has been found to give a fairly close-to-reality overall flow pattern. When considering the calculated flow from the position of fluid displacement and comparing it with experimental data, a good match is seen in the shape of near-axis flows. Three vortex zones are clearly visible in the model. In the real flow there are similar vortex zones which, although not clearly visible, are visualised by photography. With the software, the overall flow pattern is fairly close to reality. However, it is not possible to conclude that the velocities of the calculated and real flows coincide. By considering the various design changes in the simulation and evaluating their effect on the hydro and thermodynamics of the process, some regularities can be identified and used in the design of new designs, i.e., the results of computer simulation can be a good guide in the design of new devices.

Analysis of heat flows in the eddy current wind generator

In the paper are presented the results of the analysis of heat flows in the wind generator with permanent magnets and. SOLIDWORKS Flow Simulation software was used to determine the circulation and heat transfer and determine the quantitative relations of heat exchange through the thermogenerator at the variation of the heat transfer liquid flow rate from 10 to 3500 l/h. The obtained results will serve for the design of new thermal generators with permanent magnets for domestic hot water preparation systems using wind energy.

(Digital Presentation) Design, Flow Simulation and Experimental Test of Micro/Milibioreactor with Pillar Structures for Bubble Control and Cell Growth

The demand for Lab on a Chip (LOC) devices, such as microbioreactors, has driven microfluidic research and technology. With the capability of controlling the environment and monitoring results in real-time, microfluidic devices are highly advantageous in the application of cell culture. On the other hand, micro/nano-scale bubbles have become a field of growing interest for addressing many challenges in LOC applications. In this work, we present a novel microfluidic bioreactor based on a micropillars design that reduces stresses caused by bubbles on the cell growth in the microchip. The combination of one chamber with 3-pillars and 10-pillars design with the channel heights of 270 µm and 2 mm was evaluated.To obtain the optimal architecture, computational fluid dynamics (CFD) simulations using SolidWorks Flow Simulation Software were created to characterize the designs. Simulations are essential to assure that the washing of cells and bubbles do not occur in the fluid and to weeding out the designs that are suitable for cell growth. Numerical results showed that the velocity is high at the inlet and outlet when compared to the interior portions of the chamber. A higher flow rate and velocity were observed during the filling time in the 10-pillars design (3.0 x10-4 m/sec) in comparison with the 3-pillars design (2.4 x 10-4 m/sec). Also, a more homogeneous filling pattern was observed in the 3-pillars designs. This behavior occurs because the increased number of pillars manifests with a greater number of nuclei of flow disturbance, and more centers of agitation, resulting in a more heterogeneous flow. Pressure is homogenous for both 3 and 10 Pillars designs with slight changes from the inlet, with higher pressure, to the outlet, with lower pressure.The microfluidic devices were manufactured using flexographic master mold (Fmold) technology and polydimethylsiloxane (PDMS 10:1) as substrate. The total liquid capacity of the microchips was calculated as 205.5 μL for 270-um-height and 1522 μL for 2-mm-height. An experimental flow test with methylene blue using the syringe pump, with an inlet flow rate at 2.5 μL/sec, and image analysis from video using ImageJ software was performed. The experimental results were found to be comparable to the simulations results. When the number of pillars and height of the chambers increased, a higher flow rate and velocity were observed during the filling time. In this context, the 3-pillar design with 2 mm height was considered the most suitable design for cell culture applications. In addition, the 2 mm larger height design was tested for bubble control, and the results showed some of the bubbles were easily removed by applying flow rate, and the ones that remained inside the chamber did not block the channels in the pillar’s designs without affecting the system.The present platform has a simple architecture, inexpensive manufacturing methods, ease of operation, and the ability to use different types of cells. The pillar milli-bioreactor system has the advantages of bubble control, a large volume of work, real-time monitoring, and a suitable microenvironment for cell culture with prospects for future health applications.

Substantiation of the main design parameters of the separation chamber of the pneumatic separator using various methods for calculating particle trajectories in the pneumoseparating channel

The article presents a study of the influence of methods for calculating particle trajectories in the pneumatic separation channel (PSC) on the design parameters of the separation chamber (length and height of the exit window), completed in 2013-2021. The field of air flow velocities and trajectories of spring wheat seed material components in the separation chamber of fractioning pneumatic seed separator was constructed. The initial data for the calculation were the information obtained earlier when calculating the trajectories of particles in the PSC by various methods. The location at the outlet of the channel, the value and direction of the particle velocity vectors were determined by computer modelling using the Solidworks Flow Simulation software package and two experimental and theoretical methods. They took into account the real velocity field of the air flow with and without grain load. The obtained values of the design parameters are compared with the results of experimental studies of the separation chamber. It should be noted that the methods of calculating the trajectories of grain impurity particles have a significant impact on the length of the separation chamber and the height of the exit window. The maximum length of the separation chamber of 0.75 m will be required for computer modelling of the velocity field in the PSC. Much smaller values of 0.50 m and 0.45 m will be required when calculating the trajectories of particles in the PSC using the velocity field obtained by experimental and theoretical methods. During the experimental study of the separation chamber during the cleaning of wheat seeds, the optimal length of the separation chamber was determined to be 0.55 m with an exit window height of 0.30 m. Thus, the values of the design parameters of the separation chamber obtained by experimental and theoretical methods are the closest to experimental data, which makes it possible to recommend them for use at the design stage of pneumatic separators.