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Boundary load on solid in fluid
Posted 28.08.2020, 11:02 GMT-4 Fluid & Heat 0 Replies
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Hello, I'm trying to model the stokes flow around a solid insert in a ball of fluid. I managed to create a cylinder of steel inside a sphere of water.
The cylinder is solved by solid mechanics as a linear elastic material. The flow is solved as a creeping flow, with a moving mesh in the sphere, around the cylinder.
If I add pressure inlets, the cylinder is moved by the pressure-induced flow. Success !
However, the problem I want to solve is different : I want to solve the flow in the fluid when an external force is applied on the cylinder.
So I used a boundary load (in the solid mechanics module) on one side of the cylinder. When this boundary load is zero, the solver happily converges to a zero flow.
When the boundary load is larger than zero, however small, there is no convergence. This is true wether there are inertial terms in the flow, and wether the flow is weakly compressible or incompressible.
I am doing anything wrong ?
Hello Serge Dmitrieff
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