VMFLGPU005

VMFLGPU005
Turbulent Natural Convection Inside a Tall Cavity

Overview

Reference

P.L. Betts, I.H. Bokhari. "Experiments on turbulent natural convection in an enclosed tall cavity". International Journal of Heat and Fluid Flow, Vol. 21, pp. 675-683, 2000

SolverAnsys Fluent GPU
Physics/ModelsTurbulent flow, buoyancy effects, Boussinesq approximation
Input File
vt005.msh, vmfl005.jou

Test Case

Natural convection in the turbulent flow field of an enclosed cavity with a length-to-width ratio of 28.6 is modeled. The Rayleigh number is in the turbulent range. The two vertical walls are kept at different temperatures, while the horizontal walls are adiabatic.

Figure 190: Flow Domain (not to scale)

Flow Domain (not to scale)
Flow Domain (not to scale)

Material PropertiesGeometry Boundary Conditions

Density : Boussinesq approximation

Specific Heat = 1005 J/kg-K

Viscosity = 1.81X 10-5 kg/m-sec

Molecular weight = 28.966

Length of the cavity = 2.18 m

Width of the cavity = 0.0762 m

Temperature of Cold wall = 288.25 K

Temperature of Hot wall = 307.85 K

Top and bottom walls are adiabatic

Analysis Assumptions and Modeling Notes

The flow is steady and is induced by natural convective heat transfer.

Results Comparison for Ansys Fluent GPU

Figure 191: Comparison of Vertical Velocity at Y/h = 0.05

Comparison of Vertical Velocity at Y/h = 0.05

Figure 192: Comparison of Temperature at Y/h = 0.05

Comparison of Temperature at Y/h = 0.05