---
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.