# Cavity radiation heat transfer

**URL:** <https://prepomax.discourse.group/t/cavity-radiation-heat-transfer/3707>\
**Category:** General Questions\
**Tags:** results\
**Created:** [September 29, 2026, 6:50pm UTC](https://prepomax.discourse.group/t/cavity-radiation-heat-transfer/3707 "2026-09-29T18:50:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![arjunrakshith](https://avatars.discourse-cdn.com/v4/letter/a/e47774/32.png) [@arjunrakshith](https://prepomax.discourse.group/u/arjunrakshith)\
**Post date:** [September 29, 2026, 6:50pm UTC](https://prepomax.discourse.group/t/cavity-radiation-heat-transfer/3707/1 "2026-09-29T18:50:18Z")

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Hi there!

im trying to run heat transfer by radiation from a heater to a rectangular curved block. The heater is placed inside a hole in the block. There is a gap of 1mm bw the heater and the wall of the hole.

could someone pleaseee help me out how to setup the case? Seems like i have tried everything, but nothing is working.

BC: 1. Heater is at constant temperature. BC:2 block initial temperature is 30deg. (any data is ok).

i request someone to run a case with my materials data that i have created (for some reason, Al6061-T4 is not working, but Al6061-T6 is working, all units are ok)

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**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\
**Post date:** [September 29, 2026, 7:07pm UTC](https://prepomax.discourse.group/t/cavity-radiation-heat-transfer/3707/2 "2026-09-29T19:07:25Z")

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Can you share your .pmx file (with what you have so far) or at least the geometry in .step format ?