Unsteady conjugate heat/mass transfer from a circular cylinder in laminar crossflow at low Reynolds numbers

Juncu, Gheorghe

doi:10.1016/j.ijheatmasstransfer.2003.10.035

Cited by 28 publications

(7 citation statements)

References 25 publications

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“…Only a few studies are available on conjugate heat transfer from circular cylinders to a fluid considered as Newtonian. Juncu numerically investigated the steady and unsteady conjugate heat/mass transfer from a circular cylinder with an internal heat/mass source and a surrounding fluid flow. He analyzed the influence of conductivity ratio on local and average Nusselt numbers at different values of cylinder diameter.…”

Section: Introductionmentioning

confidence: 99%

Conjugate heat transfer from a circular cylinder to a power‐law non‐Newtonian fluid

Asnaashari

Tohidi

2019

Heat Trans. Asian Res.

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In this paper, conjugate heat transfer from a circular cylinder with a heat source to a non‐Newtonian power‐law fluid is studied. Numerical calculations are carried out in an unconfined computational domain for Reynolds numbers ( 5 ≤ Re ≤ 40), power‐law indices ( 0.6 ≤ n ≤ 1.4), and Prandtl numbers ( 1 ≤ Pr ≤ 50) with different heat source values. The pressure coefficient, value, and position of maximum temperature inside the cylinder and the local and average Nusselt number are calculated. Also, the effects of Re, Pr, n, and heat source value on the thermal characteristics in the solid cylinder and the fluid around it are studied and discussed.

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Section: Introductionmentioning

confidence: 99%

Conjugate heat transfer from a circular cylinder to a power‐law non‐Newtonian fluid

Asnaashari

Tohidi

2019

Heat Trans. Asian Res.

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“…The study of hydrodynamic and thermal transport characteristics for flow past a heated object has received considerable attention by the research community in the recent past, [1][2][3][4][5][6][7] primarily motivated by its relevance in industrial and engineering applications. Mixed convection occurs when there is an externally imposed fluid flow along with fluid motion caused by buoyancy effects originated by temperature difference between the object/body and the surrounding fluid.…”

Section: Introductionmentioning

confidence: 99%

Analysis of mixed convection past a heated sphere

Nath

Pati

Raju

2018

Proceedings of the Institution of Mechanical Engineers, Part E:

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The hydrodynamic and thermal characteristics for laminar axisymmetric mixed convection from a heated sphere are analyzed numerically in this work. The governing transport equations of conservation of mass, momentum, and energy have been solved using a higher order compact scheme. The results are presented in terms of the distribution of the streamlines, isotherms, and vorticity contours, and local Nusselt number along the sphere surface together with drag coefficient and average Nusselt number. We identify critical Richardson number above which separation of flow is suppressed. It is revealed that the drag coefficient decreases with an increase in the Reynolds number (Re) and the decrease is more profound for lower range of Re. It is further revealed that the drag coefficient increases monotonically with an increase in the Richardson number, while the same decreases with the increase in the Prandtl number. The average Nusselt number increases monotonically with the increase in Reynolds number, Prandtl number, and Richardson number.

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“…Heat transfer from a circular cylinder has been the subject of research due to its occurrence in many industrial and engineering applications such as heat exchanger tubes, chimney stacks, cooling towers, measuring probes, and sensors (Sarkar et al, 2011), drying of different materials (textiles, veneer, paper, and film materials), cooling of glass, plastics, and industrial devices, from turbine blades to electronic circuits, anemometry, and chemical or radioactive contamination/purification (Juncu, 2004), nuclear reactors, hot wires, and steam pipes (Mahfouz, 2003). In some processes, it takes place only by free convection or forced convection.…”

Section: Introductionmentioning

confidence: 99%

Effects of Viscous Dissipation on Unsteady Mixed Convection Heat Transfer from a Circular Cylinder for Parallel and Contra Flows

2017

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Unsteady mixed convection heat transfer from a circular cylinder has been investigated in the presence of viscous dissipation. The isothermal horizontal cylinder is placed to the oncoming free stream whose direction is considered in the free convection flow (parallel flow) and opposite to it (contra flow). The system of dimensionless governing equations for unsteady, two-dimensional flow is reduced to a suitable form for integration, and the resulting equations are solved employing finite-difference method. For both parallel and contra flows, the influences of the viscous dissipation on the Nusselt number are found to be strong; however, it has rather weak effect on the vorticity distribution. In the presence of the viscous dissipation, the isotherms are significantly changed while there is less effect on the streamlines. Under the same conditions, the size of the vortex for the contra flow is larger than that for parallel flow.

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Unsteady conjugate heat/mass transfer from a circular cylinder in laminar crossflow at low Reynolds numbers

Cited by 28 publications

References 25 publications

Conjugate heat transfer from a circular cylinder to a power‐law non‐Newtonian fluid

Conjugate heat transfer from a circular cylinder to a power‐law non‐Newtonian fluid

Analysis of mixed convection past a heated sphere

Effects of Viscous Dissipation on Unsteady Mixed Convection Heat Transfer from a Circular Cylinder for Parallel and Contra Flows

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