I observe that Fluent solve all equations together since the number of iteration augmente when I add my uds the computational matrix augmente nAnd in my simulation I want to use the simple algorithm for my uds and coupled for fluide equations (pseudo transient) when I solve my uds by this algorithm it give me unwanted result so I think that the solution here is :nFluent let the possibility to compute each equation separately with proper algorithm and matrix in same session.nOr I export the solution from other session of fluent i.e I lunch fluent for the fluid in part and I lunch fluent session for my uds with simple algorithm in other part where the result of this later will be exported like a source term for fluide equations.nPlease help me nBest regardsn