Week 11- Broadband Noise modelling over Ahmed body
Week 11- Broadband Noise modelling over Ahmed body
In this challenge, you are required to do the following.
- Describe Ahmed's body and its importance.
- Setup the domain and setup assuming body is travelling at 110 kmph
- Run the setup till convergence and plot for static pressure and coefficient of drag and lift to check for convergence
- Turn on Broadband- modelling and detail the acoustic field study over Ahmed body.
Answer
Ahmed Body is a simplified vehicle body used for capturing basic yet charecteristic features seen in objects used in the automobile industry. The flow around the body consists of all types of flow, from flow accumulation to flow stagnation. There are numerous experimental and simulation data for the body, due to its significance in the CFD community.
The Ahmed Body can be used for validating experimental turbulence models/parameters, to check the validity of one's CFD code, etc.
In this project, the Ahmed Body will be simulated for an inlet velocity of 31 `m//s` or 110 `km//h` along a moving road.
In this challenge, we are going to simulate the acoustic behaviour of airflow over an Ahmed body.
The below shown image is the 3D geometry of our sim setup.
Meshing,
To make the cell limit within the student license limit, we put an element size of 200mm size.
The final mesh of the 3d geometry to be processed.
Setup..
Setting up the viscous model
Setting up the cell zones
Boundary conditions
RESULTS,,
Scaled-up residuals
Drag coefficient
Lift Coefficient
Static Pressure
Velocity Magnitude
after running the simulation, enabling the acoustics model
