[Anna Tian]

Hi,

May I ask what does it mean by 'solution has diverged'? Usually how to avoid this?

Thanks.

[cdegroot]

If a solution diverges that means the iterative process that is supposed to drive the initial guess of the solution to the actual solution has failed and instead the solution has been driven further away from the actual solution.

There are many things that could cause this including inconsistent specification of physics/boundary conditions or not applying enough relaxation to stabilize the numerical method. Generally it means your problem is ill-posed in some way or the iterative method is unstable in some way.

[arunbaghel]

Originally Posted by Anna Tian

Hi,

May I ask what does it mean by 'solution has diverged'? Usually how to avoid this?

Thanks.

this means ur solution is not correct, convergence means there is acceptable difference between previous and current solution, it depends upon how much u have set residual and divergence means there is large difference the residual