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+---
+type: concept
+title: "Midas FEA CFD Analysis"
+created: 2026-06-02
+updated: 2026-06-02
+address: c-000156
+aliases:
+  - MIDAS FEA CFD
+  - midas FEA wind CFD
+tags:
+  - concept
+  - finite-element-method
+  - cfd
+  - wind-loads
+  - midas-fea
+status: current
+related:
+  - "[[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]]"
+  - "[[Finite Element Heat Transfer and Field Problems]]"
+  - "[[Abaqus Fluid Acoustic Eulerian and Particle Elements]]"
+  - "[[Abaqus Eulerian and Particle Methods]]"
+sources:
+  - "[[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]]"
+---
+
+# Midas FEA CFD Analysis
+
+## Definition
+
+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.
+
+## Connections
+
+- [[Finite Element Heat Transfer and Field Problems]] captures the broader field-problem theme.
+- [[Abaqus Fluid Acoustic Eulerian and Particle Elements]] and [[Abaqus Eulerian and Particle Methods]] are related production references, though they are not the same CFD formulation.
+