Looking towards an incompressible flow (with K-e, turbulence model), with mass flow/velocity inlet and Pressure outlet boundary condition. Which initialization method preferred? How far it can impact the iterations number and convergence.
Hybrid initialization should be preferred and usually it accelerates the overall computation. Standard initialization is just filling the filed properties with constant values, while hybrid initialization solves a number of iterations (10) of a simplified equation system and thereby gets usually a better guess for the flow variables, in particular for the pressure field.
Best regards,
Dr. Th. Frank.
Dear Ajith Krishnan
To the best of my knowledge, the only influential difference between these two initializations is that for porous media simulations we had better use the Standard Initialization method. Because the default Hybrid initialization method does not account for the porous media properties, and depending on boundary conditions, may produce an unrealistic initial velocity field. For porous media simulations, the Hybrid initialization method can only be used with the Maintain Constant Velocity Magnitude option. For other problems, there is no significant effect between the two methods.
Best regards.
Hybrid initialization should be preferred and usually it accelerates the overall computation. Standard initialization is just filling the filed properties with constant values, while hybrid initialization solves a number of iterations (10) of a simplified equation system and thereby gets usually a better guess for the flow variables, in particular for the pressure field.
Best regards,
Dr. Th. Frank.
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