Numerical Solver
 

I am writting a UDF for activity coefficients of some components in the liquid phase. The UDF itself needs to solve a non-linear system of n equations with n unknowns. It will then process the solutions and return a value back to Fluent solver. I am wondering if Fluent let us access its numerical solver some how to do this or I must need aids from external solver (Matlab, etc...). Thank you for all contributions.