Raidation Heat Transfer with Specified TMP_GAS_FRONT

[bkocamantr]

Dear all,

When we specify a TMP_GAS_FRONT and convective heat transfer coefficient boundary condition for a surface, does the radiation get calculated using the TMP_GAS_FRONT temperature? Suppose there is no chemical reaction to produce HRR in the simulation.

[rmcdermo]

Where did you find the namelist parameter TMP_GAS_FRONT?

[mcgratta]

Maybe he meant TMP_front_gas? In any event, the best way to know exactly how that parameter is going to perform is to do a simple verification test. Normally these kinds of parameters are to be used only for verification. They don't make much sense in a real 3D fluid flow solve.

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On Mon, Jun 8, 2026, 6:35 PM Randy McDermott ***@***.***> wrote: Where did you find the namelist parameter TMP_GAS_FRONT? — Reply to this email directly, view it on GitHub <#16325?email_source=notifications&email_token=ACWPCF7YOWVCLEOUUFJF2KD463TNXA5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNZSGI2DSOBTUZZGKYLTN5XKU43VMJZWG4TJMJSWJJLFOZSW45FMMZXW65DFOJPWG3DJMNVQ#discussioncomment-17224983>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACWPCF3C6OS73FH5XN2CHCT463TNXAVCNFSM6AAAAACZ6VZ5PGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTOMRSGQ4TQMY> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/ACWPCF7QUA5WTJUG64T5MPD463TNXA5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNZSGI2DSOBTUZZGKYLTN5XKU43VMJZWG4TJMJSWJJLFOZSW45FKMZXW65DFOJPWS33T> and Android <https://github.com/notifications/mobile/android/ACWPCF6YS3OKQJAPGLE7DY3463TNXA5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNZSGI2DSOBTUZZGKYLTN5XKU43VMJZWG4TJMJSWJJLFOZSW45FOMZXW65DFOJPWC3TEOJXWSZA>. Download it today! You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[bkocamantr]

Hi both, thanks for responding. Following is a snapshot from the latest user guide. I want to define an ISO 834 curve using this feature to mimic furnace temperature evolution near the surface. The analysis is not part of a real world problem. It's to test the 3D heat transfer capability. I wonder whether this temperature is used to calculate Q_rad_in, or a separate surface should be setup to expose the solid surface in question to radiation?