NFX CFD
Overview
This video covers the fundamentals of external flow analysis by predicting how air flows around a vehicle body while it is in motion.
CFD Analysis Workflow :
• Model Preparation & Meshing
Import the vehicle and surrounding air domain, assign the fluid and solid materials required for CFD, and apply a finer mesh near the vehicle surface where velocity and pressure change sharply. The outer region is kept coarser to balance accuracy and computational efficiency.
• Boundary Conditions
Set up the external flow conditions with an inlet where air enters, an outlet where air exits, wall conditions on the ground and vehicle surface, and pressure conditions on the remaining outer boundaries.
• Convergence & Result Analysis
After the simulation, evaluate convergence based on the stability of residuals and monitoring points. Analyze velocity contours, vectors, and streamlines to examine aerodynamic characteristics such as flow separation and wake formation around the vehicle.
Through this video, viewers can learn the complete external flow workflow, from geometry preparation and meshing to boundary condition setup, convergence assessment, and result interpretation. This core sequence underlies the CFD examples that follow.
Download Example Files
CFD Analysis Workflow :
• Model Preparation & Meshing
Import the vehicle and surrounding air domain, assign the fluid and solid materials required for CFD, and apply a finer mesh near the vehicle surface where velocity and pressure change sharply. The outer region is kept coarser to balance accuracy and computational efficiency.
• Boundary Conditions
Set up the external flow conditions with an inlet where air enters, an outlet where air exits, wall conditions on the ground and vehicle surface, and pressure conditions on the remaining outer boundaries.
• Convergence & Result Analysis
After the simulation, evaluate convergence based on the stability of residuals and monitoring points. Analyze velocity contours, vectors, and streamlines to examine aerodynamic characteristics such as flow separation and wake formation around the vehicle.
Through this video, viewers can learn the complete external flow workflow, from geometry preparation and meshing to boundary condition setup, convergence assessment, and result interpretation. This core sequence underlies the CFD examples that follow.