Brake Disk Heat Transfer CFD Simulation, ANSYS Fluent Training

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In this project, the heat transfer process in brake disks is simulated.

This ANSYS Fluent project includes CFD simulation files and a training movie.

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Brake Disk Introduction

Disks are one of the most widely used components in the industry. The study of the performance of disks and also the effect of their rotation on each other has always been considered by design engineers in mechanics. The heat generated by the rotation as well as the friction created at the point where the disks come in contact with each other has adverse effects on the body of these disks and reduces their life. Simulation of brake discs, the study of the phenomenon of heat generated, and also the transfer of heat from the discs to each other as well as their surroundings are among the most important issues discussed in the industry.

Project Description

In this project, the heat transfer process in brake disks is simulated. “Disk2” has a rotating motion with a rotational velocity of approximately 343rpm. The existing disks have the same temperature equal to 343 K. since “Disk1” is stationary, it will cause “Disk2” to slow down and exerts friction to it. The Laminar model is used to solve fluid flow equations and the energy model is also activated to calculate the temperature distribution inside the computational domain.

Brake Disk Geometry & Mesh

The geometry of this model is designed and meshed in GAMBIT®. The mesh type used for this geometry is unstructured and the element number is 32884.

brake disk brake disk

Brake Disk CFD Simulation Settings

The key assumptions considered in this project are:

  • Simulation is done using pressure-based solver.
  • The present simulation and its results are steady.
  • The effect of gravity has been ignored

The applied settings are summarized in the following table.

(Brake Disk) Models
Viscous model Laminar
Energy model On
(Brake Disk) Boundary conditions
Outlet Pressure outlet
Gauge pressure 0 Pa
Temperature 300 K
Disk1 Wall motion Stationary wall
(Brake Disk) Temperature 343 K
Wall thickness 0.01 m
Disk2 Wall motion moving wall
Motion rotational
Speed 343 rpm
Temperature 343 K
Wall thickness 0.01 m
(Brake Disk) Solution Methods
Pressure-velocity coupling Simple
Spatial discretization pressure standard
momentum second order upwind
energy second order upwind
(Brake Disk) Initialization
Initialization method   Standard
gauge pressure 3001 Pa
velocity (x,y) (0,0) m/s
Temperature 300 K


The contours of pressure, temperature, velocity, etc. are presented.

All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, Training File presents how to solve the problem and extract all desired results.


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