How to match a target HRR curve in FDS using only ramp-up time and limited ignition sources

[TING-STU]

I am trying to reproduce a target heat release rate (HRR) curve using a fire spread approach in FDS.
Under the constraint that the material properties remain unchanged, I plan to adjust only the ramp-up time, while limiting the number of ignition sources to only one or two.

Under these constraints, how should I adjust the model to achieve my target HRR curve?
f06.txt
HRR.xlsx

[johodges]

See the discussion in this issue. You could do the same thing but use a sum control to calculate the total burning area from your two sources.

#13234

[TING-STU]

Thank you for the reference materials you provided, but I still cannot understand how to achieve the heat release rate curve shown in the attachment. johodges ***@***.***>於 2026年5月5日 週二，下午7:43寫道：

…

See the discussion in this issue. You could do the same thing but use a sum control to calculate the total burning area from your two sources. #13234 <#13234> — Reply to this email directly, view it on GitHub <#16228 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/B3TC73LLFQFFXXT3I4K52DD4ZHHVBAVCNFSM6AAAAACYRC3O5CVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTMOBRGU3DCOI> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[drjfloyd]

See 18.6.4 in the User's Guide for a relevant example.