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Old   May 10, 2010, 22:09
Unhappy ignition problem
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JŠn
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Hi to all,
Im trying to solve the hydrogen-oxygen flame acceleration transient 2D task using one part closed tube with obstacles. As the open part of the tube I use pressure outlet set up. As a ignition I use a ignition wall ( 4 little walls near the closed part of the geometry) with 2000 K, heat transfer coeff set to 10 - for the convection. Firstly, I run the task as a steady-state, and it seem to be no combustion at all. No pressure change, no temperature change, no flux. By the iterating, the temperature increased to about 2300 K (in a distant point) and then drop to default set up. Am I right, when I thing that steady-state analysis solve the problem in t -> infinity? But also no change occured with unsteady analysis. Where did I go wrong?..
Thank you in advance gentlemen.
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Old   May 12, 2010, 11:36
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No one has a experience with hot surface ignition?
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