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heat and mass transfer
Posted 2018年1月23日 GMT-5 07:36 Fluid & Heat, Chemical Version 5.2a 0 Replies
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Hi, I'm trying to simulate the methane combustion in a tubular reactor. For this i try to couple laminar flow, heat transfer in fluids and transport of concentrated species. I follow the round jet burner tutorial, because is very similar, only has a different feature, in my study case the reaction kinetics is necessary. I do a first study where the reacting flow is solved, and in a second study, with two steps, i solve in the first step the heat transfer using the solution of study 1 and in the second step i solve the fully coupled model.
Well, the first study is solved correctly, i can use whatever temperature in the Transport Propierties (i faced the negative concentrations using max(eps^2,r)).
Howerer when i tried to solve the second study and use ht temperature as input in Transport Propierties I get the following errors: Step 1: if I use an inlet temperatura lower than 750K (aprox.) its ok (from that temperature the activation energy is reached and reaction occurs). In other case, I have this error: "The dependent variables comp1.p, comp1.sof.inl1.Pinl, comp1.u, comp1.w are missing in the segregated solver steps. Add them to existing or new steps"
Step 2: "undefinde value found in the equation residual vector"
I attach my model, in case someone would have time to take a look. Thanks in advance
Attachments:
Hello Francisco Palomo
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