Reduced Heat Transfer Research Articles

Ultralight, Robust, Thermal Insulating Silica Nanolace Aerogels Derived from Pickering Emulsion Templates.

Synthesis of silica aerogel insulators with ultralight weight and strong mechanical properties using a simplified technique remains challenging for functional soft materials. This study introduces a promising method for the fabrication of mechanically reinforced ultralight silica aerogels by employing attractive silica nanolace (ASNLs)-armored Pickering emulsion templates. For this, silica nanolaces (SiNLs) are fabricated by surrounding a cellulose nanofiber with necklace-shaped silica nanospheres. In order to achieve amphiphilicity, which is crucial for the stabilization of oil-in-water Pickering emulsions, hydrophobic alkyl chains and hydrophilic amine groups are grafted onto the surface of SiNLs by silica coupling reactions. Freeze-drying of ASNLs-armored Pickering emulsions has established a new type of aerogel system. The ASNLs-supported mesoporous aerogel shows 3-fold greater compressive strength, 4-fold reduced heat transfer, and a swift heat dissipation profile compared to that of the bare ASNL aerogel. Additionally, the ASNL aerogel achieves an ultralow density of 8 mg cm-3, attributed to the pore architecture generated from closely jammed emulsion drops. These results show the potential of the ASNL aerogel system, which is ultralight, mechanically stable, and thermally insulating and could be used in building services, energy-saving technologies, and the aerospace industry.

Analysis of Insulation Panels Made from Agro-Industrial Waste for Reducing Heat Transfer in Colombian Coastal Cities: Case Study of the City of Barranquilla

ABSTRACT It is known that insulation panels made from natural fibers have great potential as raw materials for manufacturing various thermal insulators. Their insulating properties are due, among other things, to their porous structure and low density. This article investigated the potential reduction in heat transfer through the walls of buildings in the city of Barranquilla using insulation panels made from agro-industrial waste. Four scenarios were considered, one without thermal insulation and three using insulation panels manufactured in other studies, including a eucalyptus bark panel, a cardboard and alpha fiber waste panel, and a panel made from jute and polypropylene. The study was conducted considering the minimum and maximum temperatures in Barranquilla during the year 2022. When analyzing heat transfer using the maximum daily ambient temperature as a reference, the decrease in heat transfer per square meter ranged from 8.38–23.78 J/s, with the eucalyptus bark and jute panels performing the best, and when considering the minimum temperature conditions, the heat transfer per square meter was reduced between 2.93–10.46 J/s. It was demonstrated that the three panels used have great potential to reduce heat transfer through the walls.

Steady flow of non-Newtonian fluids: Momentum and heat transfer around a rectangular cylinder

This research aims to explore the impact of cross-sectional aspect ratio (AR), power-law index (n), Reynolds number (Re), and Prandtl number (Pr) on convective heat transfer rates using the Nusselt number (Nu) and coefficient of drag (CD) as a key metric. Numerical simulations employ the ANSYS FLUENT solver with the finite volume method. The SIMPLE scheme couples pressure and velocity, and the QUICK differencing scheme discretizes convective terms. This study varies the aspect ratio by adjusting the length-to-width ratio (b/D) to explore different configurations of AR = 1–5 and Pr = 0.7, 1, and 7, which investigate 5 ≤ Re ≤ 10 and 0.2 ≤ n ≤ 1, respectively. An increase in the Reynolds number is observed to diminish the thermal boundary layer thickness, resulting in an escalation of heat transfer rates. Additionally, the Nusselt number exhibits an upward trend with an increase in the Prandtl number. The investigation reveals a decrease in Nu with an increase in both AR and n. Specifically, higher aspect ratios and power-law indices are associated with reduced heat transfer rates. The AR emerges as a significant factor, influencing the coefficient of drag, with CD values showing an increase as AR rises, particularly at low Re. Moreover, CD is found to increase with an elevation in the n value. This study explores new ground by investigating power-law fluid behavior and heat transfer phenomenon across varied aspect ratios. These insights not only enhance the design of heat transfer systems with non-Newtonian fluids but also pave the way for future research in this less explored domain.

Application of the Finite Element Method in Determining the Reduced Heat Transfer Resistance of a Hinged Facade System in Residential Buildings

In this paper, the energy efficiency of a ventilated facade is considered by calculating the reduced heat transfer resistance of a hinged facade system (HFS). We have approved three options for fixing the hinged ventilated facade to three types of walls of residential buildings based on the material of: monolithic reinforced concrete, aerated concrete blocks, and solid brick masonry. The choice of these wall filling materials is due to their wide application, both in new construction and in the reconstruction of existing residential buildings, both in mass development and in private housing construction. The thickness of the insulation is also selected. For the selection of insulation, and in general for the calculation of the enclosing structure, the most important factor is the appearance of a dew point. The dew point depends on the thickness and material of the wall filling, the heat and humidity regime inside the building, and climatic conditions. In this paper, research is carried out in terms of calculating the reduced heat transfer resistance of suspended ventilated facades, taking into account in homogeneities using the finite element method, as well as using the traditional method, taking into account the above factors. A comparison of these calculation methods is made and a conclusion is drawn about the expediency of taking into account point bridges of cold. Through cold bridges, energy losses occur, which leads to a change in the temperature regime in the rooms (temperature decrease) during the cold period of the year, and vice versa, to increased heating of the room during the warm period of the year, which leads to the appearance of a dew point in the wall. On a ventilated facade, the most vulnerable point is the brackets, which belong to the group of point bridges of cold. Based on the calculation results, the best wall filling was determined, which reduces the thickness of the insulation from 30 % to 50 % and reduces the specific weight of the wall structure by 1.25–2.1 times, which significantly affects the load on the building foundation.

Corrigendum to Thermodynamic Analysis of Heat Transfer Reduction in Spark Ignition Using Thermal Barrier Coatings. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. Epub ahead of print 7 August 2023. DOI: 10.1177/09544070231189545

Corrigendum to Thermodynamic Analysis of Heat Transfer Reduction in Spark Ignition Using Thermal Barrier Coatings. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. Epub ahead of print 7 August 2023. DOI: 10.1177/09544070231189545

Cupric oxide nanofluid influenced parabolic trough solar collector: thermal performance evaluation

ABSTRACT The availability of solar radiation has potential for energy applications, and recently, the parabolic trough collector (PTC) plays a crucial role in heat exchanger applications. The conventional system lacked thermal performance, reducing heat transfer coefficient and thermal efficiency. With this, the main goal of the research is to attempt to enrich the overall thermal capacity of the PTC system by introducing triangular copper fins and CuO nanoparticles (10–20 nm). During the experimental evaluation, the different concentrations (0.1, 0.2, and 0.3%) of CuO blended with water (nanofluid) are permitted to circulate the receiver boundary configured with PTC setup 3.5 m2 at the flow rate of 0.12 kg/s. Effects of CuO nanofluid concentrations on heat gain, heat transfer coefficient, and thermal and exergy efficiency of the system are measured and spot the optimum heat gain of 689.9Wm enriched heat transfer coefficient of 172.3 W/m2K, maximum thermal and exergy efficiency of 70.9% and 37.2% respectively.

Stability and thermodynamic property of TiO2/R141b nanorefrigerants by multi‐objective optimization

AbstractUtilizing nanorefrigerants as working fluids can significantly enhance the energy efficiency of low‐temperature waste heat recovery systems (≤ 50°C). Refrigerants with low viscosity and density require a substantial amount of surfactant to maintain a stable suspension of nanoparticles. However, the excessive use of surfactants, which have a notably low thermal conductivity, could lead to foam generation and reduce heat transfer coefficient. High viscosity lubricating oils with small amount of surfactant can prolong the stable suspension time and produce repulsive force. Therefore, a new combination of them improves the stability of TiO2/R141b nanorefrigerants. Additionally, viscosity and thermal conductivity of the nanorefrigerants were optimized using an implementation of a modified non‐dominated sorting genetic algorithm (NSGA‐II). The results show that adding lubricating oil inhibits aggregation of the nanoparticles leading to a stable suspension for more than 6 h at volumetric mixing ratios (lubricating oil: refrigerant) greater than 1:30. The best dispersion stability was achieved at surfactant polyvinyl pyrrolidone (PVP) mass ratio of 0.5, and the average absorbance value was increased by 65.45%. Compared with pure refrigerants, the thermal conductivity of TiO2/R141b (0.15 vol.%) nanorefrigerant was enhanced by up to 12.59% under the optimum mixing ratio. Moreover, the studied nanorefrigerants exhibited shear thickening behavior throughout the studied shear rate range, with increased non‐Newtonianization with decreasing temperature. Finally, the Pareto points were divided into three representative groups based on thermal conductivity and viscosity. These findings suggest enhanced high heat transfer efficiency with pumping power of nanorefrigerant in the waste heat recovery systems.

Stefan flow of nanoliquid passing a plate surface with changeable fluid properties

This article describes the significance of ‘Stefan suction/blowing’ on the forced flow of nanoliquid past the surface of a ‘plate’ with temperature-obeying ‘thermal conductivity’ and ‘fluid viscosity’ with ‘zero nanoparticle flux’ at the ‘plate’ that has not till been attended by anyone and thus it points to the originality of present investigation and here lies the novelty of our work. Nanofluid flow is modeled with the help of ‘Buongiorno's two-phase model’ which contains the instantaneous virtue of thermophoresis diffusion and Brownian movement. This investigation shows that the speed of heat transport is remarkably augmented by the variable ‘thermal conductivity’ and variable ‘viscosity parameters’ which is the main contribution of this research. Due to changeable viscosity, reducing nature of velocity as well as the reducing nature of concentration of the nanoparticles near the ‘plate’ are observed. Due to Stefan's blowing parameter, fluid velocity augments but ‘temperature’ is observed to reduce for mounting values of Stefan's blowing parameter. 3.2 % reduction in skin-friction coefficient is noted when variable viscosity parameter reduces from -6 to -8. Moreover, 7.1 % reduction in heat transfer as well as mass transfer is noted when the variable thermal conductivity parameter rises from 0.2 to 0.4. The consequence of this inspection exposes a variation of exciting diversity which claims extra exploration of the present study.

Impact of the Saudi Building Code on Residential Construction Costs

The government of Saudi has implemented the Saudi Building Code (SBC) for residential buildings to set standards for their design, construction, and maintenance. However, this may result in unexpected costs that are passed on to the citizens and thus have a certain economic impact. Therefore, this study examined the additional costs imposed on citizens and the economic impact of implementing the SBC on residential buildings. This study surveyed building developers, architects, and citizens to gather data on the costs associated with adhering to the code such as material and labor costs. This study found that the additional costs imposed on citizens and the economic impact of implementing the SBC in residential buildings were relatively small. The potential long-term benefits of the SBC such as energy efficiency savings and reduced environmental impact outweigh the short-term costs. The case that applied the SBC had operating costs that were almost 44% lower. Energy efficiency was increased by the SBC’s contribution to reducing heat transfer through building components and external elements. In order to minimize heat absorption and electricity usage, thermal insulation, double and heat-reflecting glass, and light exterior colors are all recommended. The findings of this research provide valuable insights for policymakers and stakeholders in the construction industry because they consider the implementation and enforcement of building codes in the Kingdom of Saudi Arabia.

Effect of the Non-Linear Radiative Unsteady Mixed Convective Flow over a Curved Stretching Surface with Soret and Dufour Effects: A Numerical Study

The subject of unsteady convective flow with non-linear thermal radiation has become an important issue of research, due to its implications in advanced energy conversion systems operating at high temperature, solar energy technology and chemical process at high operation temperature. Due to the importance of this issue, a time dependent incompressible viscous fluid flow, heat and mass transfer over a curved stretching surface has been numerically analysed by taking into account the heat flux due to concentration gradient and mass flux due to temperature gradient. Together with this the Rosseland approximation is being employed for the nonlinear thermal radiation impact in presence of thermal slip. With the aid of non-dimensional variables and the corresponding physical boundary conditions, the leading nonlinear momentum, energy, and species equations are converted into a set of coupled ordinary differential equations. These equations are then resolved using the MATLAB bvp4c solver. The stability of the numerical technique has been verified and compared with available literatures. The resultant parameters of engineering interest and the boundary layer flow field parameters and have been presented using tables and graphically plots. The study concludes that for lesser curvature parameter (0.5≤K≤0.7) the surface drag force, heat and mass transfer rates can improve by about 9.59%, 2.87% and 1.67% each respectively. The presence of the temperature ratio parameter and the non-linear thermal radiation are found to greatly influence the temperature profile and the heat transfer rate of the system. Results show that the heat transfer rate improves by about 24.39% and 16.66% for varying non-linear thermal radiation (1≤Rd≤1.5) and temperature ratio parameter (1.2≤θw≤1.4) respectively. Results obtained also show that improving the thermal slip parameter (0.4≤L≤0.6) can reduce heat transfer rate by about 13.62% and reduce the surface temperature profile.

A comparative study of thermo‐physical properties of different nanofluids for effective heat transfer leading to Li‐ion battery pack cooling

AbstractThe rapid advancement in Lithium‐ion battery technology has significantly boosted the electric vehicle market worldwide. These batteries are highly sought after by automobile manufacturers and researchers due to their exceptional energy storage and power capabilities. However, efficient working temperatures ranges from 15°C to 35°C, making it essential to implement battery cooling and heating methods to maintain optimal performance. This study primarily focuses on battery cooling. The automotive manufactures have focused on ethylene glycol, water and synthetic oils as commonly used coolants for keeping the lithium‐ion battery pack within working temperature limits. However, these fluids have lower heat conduction, leading to reduced heat transfer rates and diminished cooling performance. To address this issue, nano‐enhanced fluids, which are engineered fluids containing suspended nanospheres, have been explored. The heat transfer properties of conventional coolants are increased using nano‐enhanced fluids, thereby improving heat conduction and promoting efficient heat transfer within the battery. The study compares the temperature‐related characteristic of different nano‐enhanced fluids, including oxides of copper (CuO), titanium (TiO2), aluminum (Al2O3), silicon (SiO2), and zinc (ZnO), when added to base fluids such as synthetic oils, water and ethylene glycol. The importance to capacity of specific heat, conductivity of fluid thermally, fluid resistance to flow and fluid volumetric mass which are affected by changes in temperature limits are stressed upon. Depending on the specific application and test conditions, the effectiveness of one nano‐enhanced fluid may outperform the others. In conclusion, the thermo physical properties of nanofluids play a critical role in maintaining the battery pack temperature within operating temperature limits. The selections of nanofluids for particular battery thermal management system depends upon its arrangement along the battery pack and cell geometry. The cooling performance using nanofluids as coolant is 10% to 15% higher than the conventional used fluids. This nano‐enhanced fluid show great promise in enhancing the cooling capabilities of battery cooling systems, contributing to improved Lithium‐ion battery performance in electric vehicles.

Determination of optimum insulation thickness of building walls according to four main directions by accounting for solar radiation: A case study of Erzincan, Türkiye

Reducing heat transfer from the building will reduce the energy cost required to heat the building. Significant energy savings of 25 % to 50 % can be achieved when the appropriate thickness of thermal insulation is applied to the building walls. In this study, calculations were made to determine the optimum insulation thickness of some thermal insulation materials used to reduce the heat transfer from buildings in Erzincan, located in Türkiye's fourth climate zone. The optimum thickness of the thermal insulation to be applied to the external walls was determined using the heating degree day method, taking into account the effect of solar radiation according to the four main directions. Optimum insulation thicknesses and payback periods were calculated for combinations of two building materials (pumice and bricks), four fuels (fuel oil, LPG, natural gas, and coal), and three insulation materials (XPS, EPS, and Rock wool). The numbers of heating degree days were calculated as 2229 in the north, 1425 in the east and west, and 1118 in the south direction for the four main wall directions. The lowest optimum insulation thickness for these heating degree day values, which minimizes the total heating cost, was obtained for pumice/XPS/natural gas combination. The optimum insulation thicknesses for this combination were calculated as 0.037 m in the north, 0.025 m in the east and west, and 0.02 m in the south direction. The calculated payback periods for all combinations range from 0.9 to 4 years and the payback period of Pumice/XPS/Natural Gas combination is 4 years.

Липидный анализ слезной жидкости в диагностике дисфункции мейбомиевых желез

The tear film lipid layer plays a crucial role in maintaining ocular surface homeostasis by preventing excessive evaporation of the aqueous layer and reducing heat transfer from the corneal and conjunctival surface. The lipid composition of the tear film is unique and consists of two main layers: the outer (nonpolar lipids) and the inner (polar lipids). The thick outer layer of the tear film is composed of non-polar lipids that lack internal distributed charge, while the thin inner layer is formed by polar lipids with positive and negative charges at the ends of the molecule. Both types of lipids are synthesized in the meibomian glands (MG) and contribute to tear film stability. Meibomian gland dysfunction (MGD) alters the composition and physical properties of lipids, leading to pathological changes in both the MG and tear film. In meibomian gland dysfunction (MGD), the meibum thickens and acquires a higher melting point than normal. This leads to a decrease in the amount of nonpolar and amphiphilic lipids in the meibomian gland secretion and tear film. Consequently, the protective effect of the tear lipid layer is impaired, and its stability is compromised. Lipid mapping analyzes the lipid composition of biological samples, such as tear fluid, to study the mechanisms of the development and progression of various ocular surface diseases, including dry eye syndrome, MGD, and recurrent blepharoconjunctivitis. This method provides fundamental data on the properties of the tear film in various ocular surface diseases. It has the potential to establish hallmarks of disease course and develop personalized treatment approaches for specific clinical cases. KEYWORDS: tear, tear film lipids, ocular surface, meibomian gland dysfunction, lipid analysis. FOR CITATION: Takhauova L.R., Guseva A.A., Krylova A.A., Krivosheina O.I. Lipid analysis of tear fluid as a diagnostic tool for meibomian gland dysfunction. Russian Journal of Clinical Ophthalmology. 2024;24(2):83–87 (in Russ.). DOI: 10.32364/2311-7729-2024-24-2-7.

Thermal insulation revolution in buildings between past and present: an updated review

Eco-design, sustainability and energy efficiency are emerging concepts that reflect the need to design new building solutions that are environmentally friendly and reduce material and energy consumption. Indeed, the probability of a massive climate change, capable of threatening the planet’s stability, is high if the current trend continues. The purpose of this study is to elucidate the main thermal insulation materials dominating the current market as well as their origins, strengths, and weaknesses. Additionally, the study identifies the criteria that make an insulator ideal and may be competitive in the near future as well as the direction of research in order to develop advanced materials. The results of the consulted studies reveal that there is no agreement on an ideal insulator that gather all the thermal insulation requirements. Each of the categories has its own weaknesses that should be addressed in the future to overcome. As well, super-insulators remain one of the most promising materials in this market, but they require more research in order to overcome some of the weaknesses that limit their insertion and production on a large scale. Ecological materials produced from natural fibers are currently far from being the candidates that can compete with super-insulators. Thus, considerable efforts are required to make these natural fibers able to dominate the construction market. Similarly, the comparison of the thermal conductivity of the four categories confirms that super-insulators are the most effective in reducing heat transfer through walls and through thinner layers as well. Finally, in addition to the ecological aspect, the thermo-physical and mechanical properties, and so on, the insulating materials must guarantee certain percentages of acoustic insulation.

Effects of a rotating partition on mixed convection of hybrid nanofluid in a lid-driven cavity under different magnetic fields

There are many thermal engineering applications that employ partitions, such as heat exchangers, cryogenics, electronic cooling, and mixture separation. In this study, a novel type rotating partition is proposed and its performance is numerically assessed by the consideration of mixed convection in a lid-driven cavity with an inner isothermal blockage under magnetic field. A number of numerical simulations are run for various values of the Richardson number (0≤Ri≤50), rotational Reynolds number (0≤Rew≤50), Hartmann number of the inner domain (0≤Ha≤50), and non-dimensional size of the rotating partition (between 0.2 and 0.35). The experimental validation of the mixed convection for a lid-driven cavity is performed. It is observed the effects of rotation of the partition become important when natural convection effects become dominant. At the highest rotational speed, heat transfer reduction of 15% is obtained with increasing the Ri from 0.5 to 50, while at Ri = 50, partition rotation considering highest speed results in average Nusselt number (Nu) reduction by about 5.5%. Streamlines and isotherms are significantly affected by the size of the partition, while slight changes are obtained by varying the magnetic field strength. The reduction of Nu is obtained in the range of 8.5% and 8.8% with a higher magnetic field strength. The increments in the heat transfer by using the highest partition size are obtained in the range of 22.6% and 27.3%. When comparisons are made with non-partitioned lid-driven cavity, average Nu is reduced between 41.6% and 50% by using rotating partition. In the natural convection dominated case, heat transfer reduction will be 4% higher when rotations become active as compared to stationary partition. Feed forward recurrent network model with 25 neurons is used for accurate prediction of the thermal system of lid-driven cavity with rotating partition under magnetic field.

Energy demand for indoor climate control in museums: challenges and perspectives in time of a changing climate

The control of indoor climate conditions was considered the best approach to reduce the occurrence of climate-induced risks, but heating and air conditioning systems, if inefficient, are now resulting insufficient to meet a sustainable energy demand of these spaces. This study investigates the potential changes in heating and cooling energy demands in museums under the extreme Shared Socio-economic Pathways climate scenario (SSP5-8.5), considering temperature thresholds suggested by standards for limiting thermal-induced degradation. The expected increase of the outdoor temperatures will be responsible for a decrease in the total energy demand in museums located in Trondheim and for a slight increase in museums in Rome. In the latter, the significant decrease in the heating demand will be not sufficient at compensating the sharp increase in cooling demand. Although the thermal insulation of the building envelope makes it possible to decrease the energy demand due to the reduction of the conduction heat transfer, this solution could be responsible for overheating issues, especially in summertime and middle-low latitudes, due to a higher solar gain with respect to higher latitudes. This opens new insight into the design of multi-option passive solutions in museums to avoid the use of energy-demanding systems.

Improvement of Surface Evaporation by Reducing Heat Transfer to Fluid Bulk and Increasing Heat Absorption

Improvement of Surface Evaporation by Reducing Heat Transfer to Fluid Bulk and Increasing Heat Absorption

Aspects of Dual Simulation for Modified Thermal Flux Advances in Non‐Newtonian Reiner–Philippoff Fluid Flow past a Shrinking Plate Embedded in a Porous Medium

This study investigates the effects of non‐Newtonian Reiner–Philippoff fluids on porous media, particularly in the context of steady radiative mixed convection flow and heat transfer near a shrinking plate surface in the presence of magnetohydrodynamics (MHD). The mathematical model is constructed using PDEs and transformed into ODEs via similarity transformations, with numerical solutions obtained using MATLAB’s bvp4c function. The results demonstrate that boundary layer separation occurs slowest for dilatant fluids and fastest for pseudoplastic fluids, with Newtonian fluids exhibiting moderate separation rates. Thermal radiation and media porosity parameters are found to reduce heat transfer by approximately 0.95% and 0.02%, respectively, while accelerating boundary layer separation. Conversely, magnetic effects and suction parameters increase heat transfer by about 0.08% and 4.25%, respectively, enhancing both fluid velocity and temperature. The mixed convection parameter indicates the possibility of dual solutions, with the opposing flow favoring this phenomenon more than the assisting flow. The time‐based stability analysis reveals that the first solution is stable, whereas the second solution is unstable. These findings provide significant insights into the behavior and control of Reiner–Philippoff fluids in practical applications involving porous media and magnetic fields.

Study of the thermal protection characteristics of composite aerated concrete lintels when optimizing the life cycle of a building

The article is devoted to the study of the effectiveness of various methods of reinforcing composite aerated concrete lintels intended for window and door openings in the construction of civil buildings. The authors have developed a composite aerated concrete lintel for window and door openings, which includes two or three aerated concrete blocks and a seam at the ends made with polyurethane glue. The lintel reinforcement is made in the form of tape and parts of carbon fiber tape attached to aerated concrete blocks. The article provides a comparative analysis of various methods of reinforcing lintels made of aerated concrete, including steel rods and glass-composite reinforcement, as well as external tape reinforcement using carbon tapes. The results of the study allow us to conclude that external tape reinforcement with carbon fiber tapes is the most effective method. The most thermally efficient type of lintel reinforcement is external tape reinforcement with carbon fiber tapes, since the reduced heat transfer resistance is 6-10% higher than that of similar lintels with another type of reinforcement, and 10-28% higher than traditionally used lintels (reinforced solid lintels and composite U-shaped lintels).

Effect of Porous Fin Property on Thermohydraulic Performance of Porous‐Fin Microchannels at Different Geometric Configurations

The utilization of porous‐fin microchannel (PFM) heat sinks has become prevalent for the cooling of microelectronic chips. This paper employs three‐dimensional simulation to examine the potential benefits of substituting a solid fin with a porous fin for enhancing the thermohydraulic performance. The influence of porous structure features on the thermal and hydraulic behavior of the PFMs at different geometrical configurations is investigated. Results show that in all configurations, employing a porous fin reduces the pressure drop. The heat transfer in PFMs is influenced by the convection in the main fluid path as well as convection in the porous fin structure. An increase in the permeability of the porous fins results in enhanced overall heat transfer due to the augmented convection within the fins. On the contrary, an increase in fin porosity leads to a heat transfer reduction as the effective thermal conductivity of the fin is diminished. The possibility of enhancing thermal performance via the substitution of the solid fin with a porous fin is diminished as the height of the microchannel increases. This is attributed to the weak vertical thermal diffusion of the porous material. Moreover, the findings indicate that the geometric configuration of microchannels has an essential role in heat transfer performance of the porous fin. For instance, the thermal resistance of the PFM with a height ratio of 1.5, porosity of 0.85, and permeability of K = 5 × 10−8m2 is 10.4% less than that of the solid‐fin microchannel (SFM). However, by decreasing the permeability to K = 5 × 10−10m2, the thermal resistance of PFM was 26% higher than that of the SFM.