after iteration the solution is not converged, it shows error as temperature divergent in AMG and increase relaxation sweep. i am using energy equation with laminar condition.my objective is to find leakage between swash plate and slipper of an axial piston pump at different inlet pressure and rotational velocity of swash plate.
Not knowing all the details which support your question, I can only suggest the following:
1) You imply that the system is mathematically unstable,
by the fact that your solution is divergent;
2) In working the problem associated with helicopter dynamics, i experience a similar problem. It was corrected by modeling the system by its 2 equations.
3) The equations were defined as
- state propagation, and
- measurement.
4) Stability was evaluated by examination of the eigenvalues of the Dynamics matrix A of the state propagator -- see attachments
5) Rotational velocity may be expressed in terms of it's linear velocity by
noting that v = w x R where v = linear velocity ; w = angular velocity and R is the radius vector. Note: the linear velocity in this case is expressed in a moving coordinate frame-- see Einstein equations
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