## CFD computational domain CFD computational domain definition A Computational Fluid Dynamics (CFD) domain is the portion of space where the solution of the CFD simulation is calculated. The computational domain needs to be discretised into a computational grid (or mesh) to solve the discretised equations of fluid flows. In external aerodynamics, a CFD simulations of the flow around […]

## Courant number Courant number in CFD simulations The Courant number is a non-dimensional number named after the mathematician Richard Courant. The Courant number can be used in Computational Fluid Dynamics (CFD) simulations to evaluate the time step requirements of a transient simulation for a given mesh size and flow velocity and is linked to the Courant–Friedrichs–Lewy (CFL) […]

## CFD modelling Computational Fluid Dynamics (CFD) modelling is the process of creating a computer model to solve an engineering problem involving fluid flows. The CFD model is a representation of the fluid dynamics in a specific application, which are solved using a numerical algorithm to obtain the flow velocity, the pressure and other engineering quantities of interest […]

## Reynolds number The Reynolds number is a non-dimensional number defined as the ratio between the convective forces and the viscous forces of a fluid flow, and can be used to describe its nature, indicating whether it is laminar, transitional or fully turbulent. What is the Reynolds Number? The mathematical definition of the Reynolds number ( Re ) […]

## Turbulence models in CFD Turbulence models in Computational Fluid Dynamics (CFD) are methods to include the effect of turbulence in the simulation of fluid flows. The majority of simulations require a turbulence model as turbulent flows are prevalent in nature and in industrial flows and occur in most engineering applications. What is a turbulent flow? Turbulence is the apparent chaotic […]