Transition between free, mixed and forced convection

Jaeger, Wadim; Trimborn, Florian; Niemann, Martin; Saini, Vishal; Hering, W.; Stieglitz, Robert; Pritz, Balázs; Fröhlich, Jochen; Gabi, Martin

doi:10.1088/1757-899x/228/1/012011

Cited by 1 publication

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“…From the other side, the role of viscous dissipation parameter is to reduce the local and average Nusselt numbers at the hot left wall, while it improves them at the cold right wall In order to understand the complex physical phenomena associated with fluid flow and heat transfer, numerous studies of mixed convection in cavities have been reported extensively in the literature. Transition between free, mixed and forced convection has been studied numerically by Jaeger et al [12]. Numerical predictions were reported for the heat transfer of liquid metal flowing in rectangular flow channels.…”

Section: Introductionmentioning

confidence: 99%

Effects of Important Parameters on the Transition from Forced to Mixed Convection Flow in a Square Cavity

Boulkroune

Kholai

Mahfoud

2021

DDF

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Combined free and forced convection in a square cavity filled with a viscous fluid characterized by a small Prandtl number is studied numerically. The left wall is moving with a constant velocity v and is maintained at a local cold temperature Tc, while the right wall is fixed and maintained at a local hot temperature Th (Tc <Th). The top and bottom walls of the cavity is assumed to be adiabatic. The governing Navier-Stokes, and energy equations along with appropriate boundary conditions are solved using the finite-volume method. The flow and temperature fields are presented by stream function and isotherms, respectively. The effects of important parameters such as Reynolds number, Prandtl number, and Grashof number on the transition from forced convection to mixed convection are investigated. Results indicate that increasing Reynolds number results to fluid acceleration and, thus, to flow transition. Results also show that Grashof and Prandtl's numbers influenced the conditions for the transition to the mixed convection regime.

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Section: Introductionmentioning

confidence: 99%