VMFL070

VMFL070
Radiation Between Two Parallel Surfaces

Overview

Reference

F.P. Incropera, D.P. Dewitt, Fundamentals of Heat and Mass Transfer. 4th Edition. New York City, New York: John Wiley & Sons, Inc. 1996.

SolverAnsys Fluent
Physics/Models

Heat Transfer, radiation

Input File
VMFL070_FLUENT.cas
Project FilesLink to Project Files Download Page

Test Case

This test case considers radiation heat transfer between two parallel surfaces. The surfaces are modeled as a rectangle with a length-to-gap aspect ratio of 5 to minimize the edge effect near the mid span. The gap thickness between the upper and lower surfaces is 0.5 m.

Figure 166: Flow Domain

Flow Domain

Material PropertiesGeometry Boundary Conditions

Material does not participate in the energy transfer.

Dimensions of the domain:

2.5 m X 0.5 m

Top Wall Temperature = 400 K

Bottom Wall Temperature = 300 K

Analysis Assumptions and Modeling Notes

Because there is no flow of mass, only the energy equation is solved. Heat transfer is purely due to radiation between the two surfaces.

Results Comparison for Ansys Fluent

Figure 167: Comparison of Normalized Temperature with Analytical Result

Comparison of Normalized Temperature with Analytical Result