'External Aerodynamics investigation of a MotoGP motorbike' simulation project by DanieleObiso


#1

I created a new simulation project called 'External Aerodynamics investigation of a MotoGP motorbike':

External Aerodynamics investigation of a MotoGP motorbike


More of my public projects can be found here.

In this project the aerodynamic of a MotoGP is investigate.
A demo model was taken from https://grabcad.com/ (provided from user: Suren RK).

The aim of this work is to simulate an external aerodynamic case for a MotoGP bike at 180 km/h, including the modelling of the radiator (using porous media) and the exhaust gases (needed compressible solver).

In order to achieve a consistent simulation (especially to verify no substantial differences between incompressible and compressible approach) gradual steps were developed:
RUN_01: steady state incompressible solver, kOmegaSST turbulence model
RUN_02: steady state compressible solver, kOmegaSST turbulence model
RUN_03: steady state compressible solver, kOmegaSST turbulence model, porous model
RUN_04: steady state compressible solver, kOmegaSST turbulence model, porous model, exhaust.

The computational grid was created externally in OpenFoam, and consequently imported in SimScale Platform.
A coarse refinement mesh is used (number of cells: 3.7e+06).

Coarse mesh generated externally with OpenFOAM (snappyHexMesh)

Computational grid imported in SimScale Platform

All the setup and simulation jobs are performed within SimScale.

Monitoring of Residuals over Iterations, within SimScale

Monitoring of Force Coefficients over Iterations, within Simscale.

Simscale Post-processor was used for a first check of the computed fields.
For a complete and detailed pos-processing an external version of Paraview v4.4 was used.
In the following pictures the main features of the flow are shown:

Pressure coefficient distribution on surface

Iso-surface Tot. Pressure = 0

Iso-surface Ux = 0

Velocity distribution inside the radiator

Visualization of the temperature field, focus on exhaust gases.

Visualization of the velocity field, focus on exhaust gases.

Contribution to Drag Force

Contribution to Lift Force