Augmentation Of Convective Heat Transfer Research Articles

An experimental investigation of the convective heat transfer augmentation in U-bend double pipe heat exchanger using water-MgO-Cmc fluid

One of the major problems of using nanofluids in heat exchange applications is the forming and deposition of nanoparticles on the inner surface of the heat exchanger. In this paper, Water-Cmc fluid is used as a surfactant for nanoparticles to prevent deposition and congregation. The pressure drops and heat transfer in U-bend double pipe heat exchanger based on water-MgO-Cmc fluid, are examined. Nanoparticles of Magnesium Oxide (MgO) and Carboxymethyl Cellulose (Cmc) are used with pure water as a base fluid. The experimental rig and procedures are designed to facilitate various operational conditions such as flow rate, volume concentration of MgO particles and weight concentration of Cmc particles. Furthermore, convective heat transfer coefficient, heat exchanger effectiveness, pressure drop, friction factor, under different conditions, are measured. The results demonstrate convective heat transfer coefficient of U-bend double pipe heat exchangers is enhanced by 35% for 1 MgO vol.% and 0.2 Cmc wt.% compared to base fluid (Water-Cmc). It is concluded that pressure drops are directly proportion to the increase of MgO nanoparticles at same Cmc concentration by 23% at 0.2 wt.%. Whilst, friction factor of the system is inversely proportion to the increase of volumetric flow rate of water-MgO-Cmc fluid. An increase in MgO nanoparticle concentration increases the friction factor, hence maximum friction factor enhancement by 38% for MgO concentration of 1 vol.%. The effectiveness of heat exchanger is slightly increased by 8% with increase of MgO concentration and flow rate. Finally, thermo-physical characteristics of water-MgO-Cmc fluid at various temperatures, are measured

Convection heat transfer augmentation inside a hybrid corrugated channel by varying the positions of corrugated configurations

A numerical investigation was carried out to evaluate the thermo-hydraulic characteristics of a corrugated channel utilizing both single and hybrid corrugated configurations. The single corrugation configurations consisted of trapezoidal and saw-tooth corrugations, denoted as Single Corrugation-1 (SC1) and Single Corrugation-2 (SC2). In addition, the hybrid corrugated configurations included four distinct arrangements, each combining trapezoidal, saw-tooth, and triangular cavities in different ways, represented as Hybrid Corrugation-1 (HC1), Hybrid Corrugation-2 (HC2), Hybrid Corrugation-3 (HC3), and Hybrid Corrugation-4 (HC4). The flow was considered steady, two-dimensional, laminar with Reynolds numbers (Re = 500–900), while a heat flux of 2000 W/m2 was applied along the corrugated wall. The findings demonstrated that the flow and temperature contours were significantly influenced by both single and hybrid corrugated configurations. All hybrid corrugations showed Nusselt number (Nu) enhancements of 20%–36% compared to SC1 and 40%–60% compared to SC2 at Re = 900. Moreover, hybrid corrugated configurations showed better Thermal Hydraulic Performance (THP) compared to single corrugations. At Re = 900, the THP values for HC1, HC2, HC3, and HC4 were 0.95, 1.12, 1.05, and 1.02 compared to SC1, and 1.26, 1.49, 1.39, and 1.35 compared to SC2. Notably, among all the cases, HC2 demonstrated the most significant increase in heat transfer.

Compound passive heat transfer augmentation techniques: A comprehensive review

AbstractThe function of energy is becoming increasingly vital in meeting the requirements of modern societies and sustaining rapid economic and industrial growth globally. Heat transfer equipment has been employed for heat recovery and conversion in various domestic and industrial applications. Therefore, due to the recent global energy crisis, boosting the thermal efficiency of energy systems has become an essential requirement, which would reduce both their size and rates of energy demand. There are active and passive methods for boosting heat transfer rates. As they have no moving components, passive methods are more affordable and dependable than active ones. Applying two or more passive techniques concurrently will result in a higher heat transmission rate than any approach working independently. The current article comprehensively reviews experimental and computational investigations of passive compound forced convection heat transfer augmentation techniques at laminar, transition, and turbulent flow regimes. This article focuses on compound techniques arrangement in the form of turbulators, typical twisted tapes (TTs), surface roughness, vortex generators, and so on. The pioneering research suggests that using a lower twist ratio, lower pitch, and smaller winglet angles in TTs can result in higher heat transfer rates, albeit with a slightly increased friction factor. The combination of alternate‐axes and wings in TTs leads to more effective heat transfer enhancement within the tube.

Numerical analysis of hybrid nanofluids in rectangular duct for thermal enhancement integrated with polygonal rib

The research was carried out to investigate the augmentation of thermal performances in the Solar Water Heater (SWH) by implementing rough surfaces in the absorber plate and Nanofluid considered a working fluid. A hybrid nanofluid Al2O3 / Cu O (60:40) was taken as a working fluid and compared with Al2O3 nanofluid and base fluid to ascertain the augmentation of convective heat transfer in SWH. The forward and backward trapezoidal shapes of the rib were employed in the absorber plate at relative pitch distances p/e = 10 at relative roughness height e/d = 0.06. Average Nusselt number (Nu), and friction factor (f) were investigated at Reynolds numbers ranging from 4000 to 18000. Turbulent model k-∊ was selected to examine the vortex generated in the fluid flow direction owing to the rough surface. The result reveals that hybrid nanofluid with backward trapezoidal rib at p/e = 10 has produced a higher Nusselt number 95.6 at Reynolds number 18,000 than other ribs and fluid.

Conductive and convective heat transfer augmentation in flat plate solar collector from energy, economic and environmental perspectives - a comprehensive review.

The primary objective of the paper is to identify the effective way to enhance the conductive and convective heat transfer of the FPSC. The performance enhancements of different FPSC components such as absorber plate, absorber tube, and heat transfer fluid are reviewed in detail. The influence of absorber plate configurations, material properties, a center-to-center distance of the absorber tube, plate thickness, coatings, and tube geometry have been assessed to increase the conduction heat transfer. Also, the augmentations of convective heat transfer using different nanofluids in FPSC such as Al2O3/water, CuO/water, CNT/water, TiO2/water, SiO2/water, graphene oxide/water, MgO/water, CeO2/water, WO3/water, ZnO/water, and hybrid nanofluids are evaluated in detail. The performance improvements using both conductive and convective (combined) passive technique have been elaborated. The table representation has been used to describe the activities performed in each paper which include FPSC type, passive technique detail, properties of heat transfer fluid, Reynolds number, heat transfer aspects, pumping power, energy, exergy, environmental aspects, and inference. These data will help the researcher to identify existing activities and the potential gap. This review paper also deals with the suggestions for the research work which can be carried out in the direction of heat transfer from solar flat plate collectors.

Augmentation of Convective Heat Transfer through various practices: A Review

In case of various heat transfer applications, there is a necessity for proper utilization of energy sources. In the previous decades, various practices have been taken into consideration for the enhancement of heat transfer. We can categorize these practices in three types – active, passive and compound practices. All or any individual of these techniques have been applied in many heat exchanger application such as in thermal power plants, automobile sector, process industries, air-conditioning apparatus and chemical industries. This paper is an overview of several methods for the augmentation of heat transfer process and parameters. In most of the methods, the work was focused on increasing the surface area of the heat exchanger or on increasing turbulence using some inserts within the heat exchanger. The later part of this manuscript also depicts heat transfer augmentation using Nano-fluids.

Augmentation of natural convection heat transfer in enclosures via ultrasound: Effects of power, frequency and temperature

• Ultrasonication improves convective heat transfer in enclosures by as much as 77%. • Effect of ultrasonic power heightens at higher frequencies. • Acoustic streaming observed to contribute the most to the observed enhancement. • Per unit ultrasonic power, the observed enhancement is proportional to frequency. • Only at higher frequencies, integration of ultrasound results in energy-saving. The integration of ultrasound to enhance the natural convection heat transfer in an enclosure was experimentally investigated. The effects of ultrasonic power, ultrasonic frequency and surface temperature on convective heat transfer coefficient were analyzed to optimize the ultrasonic input. A novel dimensionless number is defined that indicates the ultrasound-induced convective heat transfer enhancement per added unit of delivered ultrasonic power. To determine and justify the effectiveness of incorporating ultrasound from an energy-savings point of view, the total energy to the system to increase the temperature to a certain degree in non-ultrasonic and ultrasound-assisted experiments was compared. With respect to ultrasonic power, application of ultrasound at any power level enhances the convective heat transfer coefficient by as much as 77% while the effect of power heightens with an increase in frequency. Amongst the three examined frequencies, integration of ultrasound was observed to enhance heat transfer more at higher frequencies. The surface temperature appears to have a negative effect on the observed ultrasound-enhanced heat transfer where higher temperatures abate the enhancement. Per unit ultrasonic power added to the system, higher frequencies show greater improvement in convective heat transfer. Comparing the trends in variation of the augmented heat transfer, the kinematic momentum resulting from acoustic streaming and the acoustic cavitation critical bubble radius with the ultrasonic frequency revealed that at lower frequencies acoustic cavitation is the augmenting mechanism and at higher frequencies acoustic streaming induces the enhancement with acoustic streaming having a higher impact in augmenting natural convection heat transfer. In terms of energy savings, a novel analysis focusing on the energy intensity of utilizing ultrasound unveiled that only at higher frequencies does integration of ultrasound result in lower total energy consumption.

Augmentation of flat surface forced convection by a pair of rectangular strips – A wavelet analysis

Turbulent flow downstream of a pair of 12.7-mm wide (W) and 25.4-mm high rectangular flexible strips was characterized using a 3D hotwire anemometer. The rectangular strips were at a separation distance of 3 W, 2 W, and 1 W and the Reynolds number based on the strip width was fixed at 8500. Discrete wavelet transform was employed to investigate the effect of various segments of the turbulence cascade on convective heat transfer augmentation over a flat surface. The fluctuating turbulent velocity was decomposed into 12 levels of Detail, D components, in addition to Approximation, A. The turbulence kinetic energy (ke) between 78 and 156 Hz (D9 component) was found to be largest. The corresponding ke peak of D9 increased from 0.0064 to 0.0074 to 0.0084 with decreasing separation from 3 W to 2 W to 1 W, respectively. Regression analysis was performed to correlate the normalized Nusselt number (Nu/Nu0) with the turbulence fluctuations at various wavelet levels. For the 3W-separation strip pair, the standardized regression coefficient has a value of larger than 0.90 for D7 to D4 levels (300 Hz to 5000 Hz). Level D1 (20 kHz to 40 kHz) followed by level D2 (10 Hz to 20 kHz) gave the largest standardized regression coefficient of 0.86 and 0.84, respectively, for the 2W-separation case. On the other hand, the lower frequencies at D12 (9 Hz to 20 Hz) and A12 (0 to 10 Hz) levels were found to be most involved in heat transfer enhancement for the 1W-separation strip pair. The corresponding standardized regression coefficient values of 0.77 and 0.79 seem to indicate that the organized large-scale vortical structures have been broken down and randomized into potent convection motions with frequencies up to 20 Hz.

Nanofluid influenced convective heat transfer and nanoparticles dispersion in porous media with a two‐phase lattice Boltzmann analysis

AbstractIn this study, a two‐phase lattice Boltzmann model (LBM) is developed and verified to study natural convective heat transfer in a porous medium that is fully saturated with Zn–H2O nanofluid (NF). Zinc, being an environmentally friendly material, is selected as the nanoparticle (NP) here. We aim to analyze NP heat enhancement augmentation and dispersion during NF transport at different Rayleigh number (Ra) values, various porosity (), and varying nanoparticle volume fraction (NVF). The equations of flow (velocity), temperature (energy), and NVF fields in porous media are solved numerically. Physical parameters of Rayleigh number, NVF, and Darcy number (Da) are varied to examine their effects on flow patterns (streamlines), temperature distribution (Isotherms), and NP spread (dispersion). Nusselt number is calculated to elucidate its relationship with Ra, Da, and NVF. Results show that Nusselt number increases upon Ra and Da numbers increment thereby accounting for convective heat transfer augmentation. However, it is noted that at Ra = 105; , the effects of varying NVF are almost the same, thereby suggesting an optimum for positive NP effect. An improved NP dispersion leading to good suspension stability for optimum Zn NP performance is observed with a higher temperature gradient at , compared to , where NP sedimentation is noticed. Likewise, an increase of NVF suggests an increase in Nusselt number until a certain optimum. This study provides deeper insight into NP dynamics and their heat transfer behavior in porous media using LBM.

Entropy generation minimization E.G.M. analysis of free convective hybrid nanofluid flow in a corrugated triangular annulus with a central triangular heater

All heat transfer phenomena are always escorted with entropy production and hence destruct the available work and energy resources. One way to minimize valuable energy rescores, especially in convective heat transfer augmentation situations, is to develop a thermal design that reduces the temperature differences inside the system and thus the entropy generation. This study analyzes an optimal thermal design for an augmented free convective situation considering a hybrid nanofluid flow in a corrugated triangular annulus heated by an underneath partial heater. Three approaches are applied to reduce entropy production: the corrugated walls, an inner heater at a lower non-uniform temperature, and the magnetic field effects. A numerical solution is presented for the normalized governing equations by a finite element method. A comparison with previously published investigation confirms the validity of results. The study reveals the influential role of the presented design in reducing entropy production due to the higher thermal conductivity of hybrid nanofluid. It is noticed that if the inner triangular body is heated at uniform or non-uniform temperature, keeping the magnitude of temperature lesser than the bottom heat source, the overall entropy significantly reduces. Moreover, overall, entropy is minimized if, instead of flat walls, corrugated walls are considered.

Augmentation of tunnel-air convective heat transfer forced by duct ventilation in a geothermal construction tunnel

This work conducts numerical simulations and parameter analyses to investigate the augmentation performance of tunnel-air convective heat transfer (CHT) forced by duct ventilation in a dead-end tunnel concerned in tunnel space cooling inside a geothermal construction tunnel. Attributed to duct nozzle jet-flow, the CHT performance varies longitudinally and augments in the region close to duct nozzle, whereas holds a flat trend in the tunnel entrance region far away. In this work, the CHT is represented by surface-averaged Nusselt number (Nu) at the tunnel-air interface with a spatial resolution to the tunnel length, and the CHT augmentation region is highlighted by the bulge pattern of the Nu distribution curve. The three-dimensional Computational Fluid Dynamics is based on to simulate the actual CHT concerning both airflow turbulence and near-wall conditions, and the influences of parameters considering different (ⅰ) shapes of tunnel cross-section, (ⅱ) outlet airflow Reynolds number (Re), and (ⅲ) ventilation duct position and (ⅳ) diameter on the CHT augmentation are respectively identified. The results show the CHT augmentation region is less influenced by the shape of tunnel cross-section and Reynolds number but notably affected by ventilation duct diameter and position. A duct with a smaller diameter and position at the tunnel side is optimal to the CHT augmentation, and hence should be considered in the duct ventilation design for tunnel space cooling in a geothermal construction tunnel. Furthermore, a semi-empirical equation about the local Nu-Re correlation for the CHT augmentation region is proposed based on numerical results.

Augmentation of convection heat transfer from a horizontal cylinder in a vented square enclosure with variation of lower opening size

Natural and mixed convection heat transfer from a horizontal cylinder placed in a vented square enclosure has been investigated using numerical method with ANSYS Fluent 16.1 software for laminar and turbulent flow. Navier-Stokes equations and energy equation with standard k-? transport equation turbulence model have been used to simulate both flow and thermal behaviors. The operating conditions covered a range of the Rayleigh number from 103 to 106 and the Richardson number range between 0.1 and 100 at variable sizes of the lower open vent with constant upper opening size. The Nusselt numbers, velocity lines and isotherms are presented to display the flow and thermal behaviors. The results displayed that the average Nusselt number is affected by Rayleigh number, Richardson number, enclosure width, and lower opening size. The Nusselt number is enhanced by controlling the lower opening size. The maximum enhancement range for Nusselt number is between 20-85% depending on the Rayleigh number, Richardson number, enclosure width to cylinder diameter, and lower opening size. The velocity lines and isotherms are directly affected by the Rayleigh number, Richardson number, enclosure width to cylinder diameter, and lower opening size.

Augmentation of Natural Convection Heat Transfer from Horizontal Circular Cylinder by Means of Helical-Coil-Turns.(Dept.M)

Augmentation of steady natural convection heat transfer from horizontal cylinder were studied experimentally. The test section consisted of a brass circular cylinder, of 301 mm length and diameters of 21.5/ 12.2 mm, heated with a constant heat flux supplied by an electrical resistive heater made of nickel-chrome wire coil. The experimental data have been obtained when the test cylinder is covered with eight type of helical-wire-coils wounded around it as well as when the cylinder is bare. The number of helix per meter length (NC) varied from 178 to 835 and the number of turns of each helical-coil per meter length (Nt) Varied from 50 to 196 at cylinder-to-helix diameters ratio (D/d) of 4.22. The tests were conducted in aim in the range of Rayleigh number of 2000 to 52000 and Prandtl number of nearly The results of heat transfer coefficient are rep resented in the relation of average Nusselt number versus Rayleigh number. The relations indicate that (Nu) is a significant function of (Ra), (Ne) and (Nt). The augmentation of heat transfer in case of use the helical-wire-coils varied from 5 to 106 % compared with the bare cylinder.

Computational Fluid Dynamics Analysis of Impingement Heat Transfer in an Inline Array of Multiple Jets

Amid all convective heat transfer augmentation methods employing single phase, jet impingement heat transfer delivers significantly higher coefficient of local heat transfer. The arrangement leading to nine jets in square array has been used to cool a plate maintained at constant heat flux. Numerical study has been carried out using RANS-based turbulence modeling in commercial CFD Fluent software. The turbulent models used for the study are three different “k-ε” models (STD, RNG, and realizable) and SST “k-ω” model. The numerical simulation output is equated with the experimental results to find out the most accurate turbulence model. The impact of variation of Reynolds number, inter-jet spacing, and separation distance has been considered for the geometry considered. These parameters affect the coefficient of heat transfer, temperature, and turbulent kinetic energy related to flow. The local “h” values have been noticed to decline with the rise in separation distance “H/D.” The SST “k-ω” model has been noticed to be in maximum agreement with the experimental results. The average value of heat transfer coefficient “h” reduces from 210 to 193 W/m2K with increase in “H/D” from 6 to 10 at “Re” = 9000 and S/D of 3. As per numerical results, inter-jet spacing “S/D” of 3 has been determined to be the most optimum value.

Mechanisms underlying flat surface forced convection enhancement by rectangular flexible strips

Employing turbulence generators, such as rectangular flexible strips, is a simple and effective approach to enhancing forced convection. In the current study, 12.7 mm wide rectangular flexible strips (with thickness of 0.1 mm, 0.2 mm and 0.25 mm, height of 25.4 mm, 38.1 mm and 50.8 mm, transversal spacing of 12.7 mm, 25.4 mm and 38.1 mm) were investigated at Reynolds number (Re) of 8500 and 6000, and freestream turbulence intensity (Tu) of 0.4%, 7%, 9%, and 11%. The convective heat transfer augmentation was analyzed in terms of the normalized Nusselt number (Nu/Nu0). The relationships between the averaged Nu/Nu0 and the strip thickness, height, spacing, Re and Tu were determined using multiple linear regression. The correlations between the local Nu/Nu0 and turbulent flow parameters, including turbulent kinetic energy, downwash velocity and near surface streamwise velocity were also illustrated. The freestream turbulence intensity (Tu) had the most significant effect in augmenting the averaged Nu/Nu0, and the local Nu/Nu0 correlated best with the local ke. The maximal averaged Nu/Nu0 over 23 W downstream, within ± 1 and ± 4 strip widths cross-stream was found for Tu = 7% case and Tu = 11% case, respectively.

Multiple-relaxation-time lattice Boltzmann analysis of entropy generation in a hot-block-inserted square cavity for different Prandtl numbers

This work analyses the effects of three different Prandtl number fluids (Pr = 0.025, 5.83 and 151) on convective heat transfer inside a closed square cavity with an adiabatic left wall and three other cold walls. A centrally positioned square hot block with respective blockage ratios of 0.25 and 0.5 heats the cavity, which induces natural convection inside it for Grashof numbers Gr = 104, 105 and 106. Besides, two different cases of mixed convection based on the direction of moving right wall are investigated for varying Richardson numbers (0.01 ≤Ri≤ 100) at Gr = 104. We implement multiple-relaxation-time based thermal lattice Boltzmann model to study these flow configurations. The comprehensive analysis of the results suggests that the block size and Pr have a considerable influence on the flow and heat transfer behaviour. The average Nusselt number over the block surface Nuh‾ and total entropy generation throughout the cavity Stot‾ increase with an increase in Pr and Gr due to the augmentation of convective heat transfer. For all three cases, Nuh‾ at BR = 0.25 is higher compared to BR = 0.5. In mixed convection, the heat transfer irreversibility mostly dominates the entropy generation at all Pr irrespective of Ri values as indicated by large average Bejan number. The present code is carefully validated with the well-established results obtained through conventional numerical techniques.

Augmentation of Natural Convection Heat Transfer In Vertical Cylindrical Annulus.(Dept.M)

In the present work, the natural convection heat transfer through vertical cylindrical annular tubes was experimentally investigated the inner cylinder is heated electrically with constant heat flux, while the outer one is subjected to ambient air. Rayleigh number was varied between 80 and 1500 throughout this investigation Aspect ratio of 50 and radius ratio of 1 5 were used. The annular gap was provided with helical-wire-eoil rings wound around the outer surface of the inner cylinder as augmentation devices. The effects of coil pitch, ring pitch, coil diameter and wire diameter were investigated from the results of the present investigation it is concluded that the heal transfer rate increases with increase of coil diameter and wire diameter and decrease of ring pitch, while it has a peak value at coil pitch to gap thickness nearly equal 0.125. It is eoncluded (rom the experimental results that the heat transferred through the annular gap is not only by convection but also by radiation and conduction. The helical-wire-coil rings are found to enhance heat transfer by a factor of 8.25. A general eorrelation is presented in order 10 help in the design of such devices

The effect of freestream turbulence on convection enhancement by a flexible strip

Turbulence generators such as a 25.4 mm tall, 12.7 mm wide (W) and 0.1 mm thick rectangular flexible strip can provide a robust means of enhancing convective heat transfer. This wind-tunnel study aimed at uncovering the effect of freestream turbulence on heat convection enhancement of a flat surface by a flexible strip. The freestream turbulence was furnished by a 6 mm thick orificed perforated plate (OPP) with 57% perforation consisting of 38.1 mm diameter (D) holes. The OPP was installed at 10D, 13D and 16D upstream of the strip, to achieve 11%, 9% and 7% turbulence. The investigation was conducted at a Reynolds number based on the strip width of 6000. The convective heat transfer augmentation was analyzed in terms of Nusselt number with respect to the reference no-strip case (Nu/Nu0). The flow turbulence was characterized with the help of a 3D hotwire probe. The freestream turbulence is found to diminish the flexible-strip induced Nu/Nu0 significantly. This is principally because Nu0 increases considerably with increasing freestream turbulence. It is of practical significance that the flexible strip always increases Nu, and this improvement is largest with respect to an otherwise ‘laminar’ freestream.

Harnessing flow-induced vibration of a D-section cylinder for convective heat transfer augmentation in laminar channel flow

Flow-induced vibration (FIV) of a D-section cylinder is computationally studied and utilized to augment convective heat transfer in a heated laminar channel flow. An in-house fluid–structure interaction (FSI) solver, based on a sharp-interface immersed boundary method, is employed to solve the flow and thermal fields. In conjunction, a spring–mass system is utilized to solve for the rigid structural dynamics. Using numerical simulations, we highlight that the oscillations of a D-section cylinder are driven by vortex-induced vibration and galloping. It is observed that as the cylinder vibrates, vortices are shed from the apex of the cylinder due to the separating shear layers. These vortices, categorized using shedding patterns, interact with the heated channel walls. This interaction results in disruption of the thermal boundary layer (TBL), thus leading to heat transfer augmentation. The enhancement in thermal performance has been quantified using time and space-averaged Nusselt numbers at the channel walls. It is observed that the oscillation amplitude of the D-section cylinder and the extent of vortex–TBL interaction are crucial for determining heat transfer augmentation. Both symmetric and asymmetric thermal augmentation at the top and bottom channel walls have been reported. Finally, to assess the effectiveness of heat transfer augmentation, the D-section cylinder FIV is compared to other FSI systems operating under similar conditions.

Augmentation of mixed convection heat transfer in a lid-assisted square enclosure utilizing micropolar fluid under magnetic environment: A numerical approach

The present article comprises numerical simulations against mixed convection thermal transfer within a lid steered square geometry comprising micropolar liquid material with the incorporation of consistent magnetic environment. The lower straight wall of the container is supposed to be heated uniformly and the rest of the sides are maintained at lesser temperature. The finite element analysis is carried out by Galerkin weighted residual to obtain results against extensive ranges of involved flow parameters such as micropolar parameter, Reynolds, Grashof and Hartmann numbers. The results achieved during the present numerical investigation reveal that a larger Grashof number enhances the stability of streamline circulations. Moreover, the enhancement in Reynolds and Hartmann numbers decreases the stability of streamline circulations. The convective regimes are found dominant than that of the conduction for small Hartmann and large Grashof numbers. Furthermore, thermal transfer is observed for the micropolar parameter, Hartmann and Reynolds numbers. It is noticed that thermal exchange factor is decreasing with respect to the Grashof number at the top side of the container whereas an inclusive heat transfer measure enhances by raising the Grashof number and declines against the Reynolds and Hartmann numbers, near the heated wall.