Midas FEA CFD analysis is the manual's computational fluid dynamics workflow for wind-loading and aerodynamic response of civil structural sections, especially bridge-like two-dimensional sections.
How It Works
The manual describes a structured two-dimensional mesh, compressible viscous Navier-Stokes equations, Favre-averaged RANS equations, two-equation turbulence models, density-based time marching, and finite-volume spatial discretization.
Boundary conditions include far-field, solid wall, and symmetry conditions. Turbulence options include q-omega and k-omega SST/BSL type models. Numerical ingredients include local preconditioning for low-speed flow, Roe numerical flux, entropy correction, MUSCL extrapolation, limiters, steady AF-ADI, and unsteady dual time integration.
Outputs include velocity, pressure, vorticity, turbulent viscosity or turbulence ratios, turbulent energy or intensity, and aerodynamic coefficients such as lift, drag, and moment.
Solver Development Notes
This CFD chapter is a useful multiphysics boundary reference, but it is not part of a minimal structural FE solver core.
For a custom structural solver roadmap, treat CFD as an external reference or later coupling target after structural elements, materials, dynamics, and contact are stable.
If implemented, use a proven finite-volume or CFD library for the flow solver rather than folding it into the structural element assembly path.
김경종