After researching and documenting the material properties at the operating temperature extremes, we defined the fluid operating temperatures and pressures as well as the valve actuation pressure for each load case. The mesh was created such that there were a minimum of two elements across the thickness of any section. We further refined the mesh in areas of high stress and small geometric features. The mesh quality was verified by checking that the element aspect ratio and Jacobian fell within a desired range.
Initial simulations identified areas of high stress. Progressive mesh refinements were applied to these areas to show mesh convergence. When the change in maximum stress was less than 1% between subsequent mesh refinements, the mesh was sufficiently refined to capture the stress gradient in the region of interest.[...]