NFX-T: 1000 Simple Gearbox

Set up a simple multiphase gearbox for drive train oiling simulation using SimLab for CFD-nanoFluidX solution. Oil distribution will be analyzed and torques and forces will be computed.

Note: A PDF version of this tutorial is available in the Model Files section.
In this lesson you will learn how to:
  • Select unit system
  • Import CAD geometry (*.x_b)
  • Define SPH flow solution
  • Prepare the geometry for simulation
  • Assign materials
  • Define domain (gravity)
  • Assign motion
  • Create reference node for fluid volume
  • Perform one-click SPH particles creation
  • Review conflicting fluid particles
  • Set solver settings and result requests
  • Data check
  • Export particle and configuration files
  • Save a SimLab database (*.slb)
The model is a simple gearbox with two gears of radius 62.5 mm (Output_Gear) and 20.0 mm (Input_Gear). We will create a 1.0 sec multiphase simulation at a resolution of 1.0 mm. Input speed will be 1000 rpm.

Figure 1.


  • Physical time: 1.0 s
  • Resolution: 1.0 mm
  • No. of particles: 1.3 M
  • Pre-processing: < 10 min
  • 1x NVIDIA Tesla V100: 30 min


To run this simulation, you will need access to a licensed version of SimLab and nanoFluidX.

Model Files

Before you begin, copy the file(s) used in this tutorial to your working directory.

Tutorial Video

Additional Resources

For more tutorials, visit the SimLab Learning Center.