Hello? I'm trying to simulate tar reforming in Ansys Fluent using the species transport model. I have toluene and naphthalene as tar species with a number of reactions. I was using the mixture template, but there is a problem that the last species in the mixture list shows the biggest fraction at the outlet in the results. May I consider using another approach? Please help me to figure out this problem.
Dear Azjargal Tungalag ,
Usually, in fluent the last specie in the list is calculated by algebraic equations for mass balance which is given as- 1- the sum of all species calculated through specific PDEs. This could lead to error in the last species calculation if its value is very small compared to other species since the residual error of all the species will be accumulated in the last. To avoid such an issue always consider the last species some bulk species like for instance N2 or any other species which has a large percentage throughout the domain.
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