Coal gasification-problem with convergence -- CFD Online Discussion Forums

October 27, 2005, 08:20	Coal gasification-problem with convergence	#1
Claudia Guest Posts: n/a	Hello FLUENT users, i am working on a coal gasification problem. In principle, the mesh seems to be working as long as I am only using the coal as a gasequivalent (I use the coal composition calculated from the prePDF). As soon as I inject only a small mass flow of real coal, I get problems in getting a converged solution. When I increase the mass flow of the real coal even more, the residuals also increase and don't seem to drop down somewhen. Can anybody help me with this problem? Another problem is that i can't get rid of the turbulence viscosity ratio problem (about 2500 out of 30000 cells) Thanx a lot for your advise! Claudia

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