After I put C_UDMI in my UDF, I got this error " 999999:mpt_accept: error: accept failed: no such file or directory", and the fluent program close automatically when this error is shown. Should I need to use looping macro over cell thread in a domaim for C_UDMI? Moreover, I have got another question. When I used pure CH4 as inlet feed gas the profile of CH4, C, and H2 that take place through the udf kinetic reaction seems ok. However, when I change the feed inlet as a mixture of methane and hydrogen the profile of all species looks weird. For example, carbon should occur along the reaction time, but it occurs for a while and disappear.
Thanks for your help