Learning Forum

[leosibarani1]

When doing hybrid initialization, the number shown for each iteration is varies. The number shown in console is getting lower and lower.

I'd like to ask when doing hybrid initialization, how much the value we need so we can go to calculation?

[Muhammad Rizky Pratama Hakim]

Dear Leo,

Basically, hybrid initialization is an initialization process done by the computer by calculating the variable field (pressure, temperature, velocity, etc) with certain equations, such as the velocity field will be calculated using the Laplace equation and temperature will be constant throughout the domain. As long as the hybrid initialization is done, just calculate (run the simulation).

[Raihan Lutfianto]

 

In addition to Rizky’s answer, I consider the hybrid initialization as an initial guess to our solution, done by Fluent. Referring to Fluent User’s Guide, it says we generally do not need to change the number of iterations (default value is 10). However, for complex and highly curved geometries, if the default number of iterations is not enough to reach the convergence tolerance of 1e-06 and the flow fields are not to your liking, then you may want to increase the number of iterations and re initialize the flow.