Laminar natural convection characteristics in an enclosure with heated hexagonal block for non-Newtonian power law fluids

Krunal M. Gangawane; B. Manikandan

doi:10.1016/j.cjche.2016.08.028

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Laminar natural convection characteristics in an enclosure with heated hexagonal block for non-Newtonian power law fluids

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- Laminar natural convection characteristics in an enclosure with heated hexagonal block for non-Newtonian power law fluids
- Chinese Journal of Chemical Engineering Vol. 25, Issue 5, Pages: 555-571(2017)
- Affiliations：
  
  Department of Chemical Engineering, College of Engineering Studies, University of Petroleum and Energy Studies, Dehradun 248007, Uttarakhand,India
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.08.028
  CLC：
- Published：2017
- Accepted：
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Krunal M. Gangawane, B. Manikandan. Laminar natural convection characteristics in an enclosure with heated hexagonal block for non-Newtonian power law fluids[J]. , 2017, 25(5): 555-571.
DOI：

Krunal M. Gangawane, B. Manikandan. Laminar natural convection characteristics in an enclosure with heated hexagonal block for non-Newtonian power law fluids[J]. , 2017, 25(5): 555-571. DOI： 10.1016/j.cjche.2016.08.028.

摘要

Abstract

This work illustrates the steady state

two dimensional natural convective flow and heat transfer features in square enclosure containing heated hexagonal block maintained either at constant wall temperature (CWT) or uniform heat flux (UHF) thermal conditions. Governing equations (mass

momentum and energy) are solved by using finite volume method (FVM) with 3rd order accurate QUICK discretization scheme and SIMPLE algorithm for range of field pertinent parameters such as

Grashof number (10

≤

≤ 10

)

Prandtl number (1 ≤

≤ 100) and power law index (0.5 ≤

≤ 1.5). The analysis of momentum and heat transfer characteristics are delineated by evolution of streamlines

isotherms

variation of average Nusselt number value and Colburn factor for natural convection (

). A remarkable change is observed on fluid flow and thermal distribution pattern in cavity for both thermal conditions. Nusselt number shows linear variation with Grashof and Prandtl numbers; while rate of heat transfer by convection decreases for power law index value. Higher heat transfer rate can be achieved by using uniform heat f

lux condition. A Nusselt number correlation is developed for possible utilization in engineering/scientific design purpose.

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Related Author

Krunal M. Gangawane

B. Manikandan

Related Institution

Department of Chemical Engineering, University of Petroleum and Energy Studies, Dehradun 248007, Uttrakhand

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