Project 1 - Simulating a BTMS
AIM
The aim of this project is to simulate the flow inside a Battery Thermal Management System
The main objectives are as follows:
Excel Calculator for Volumetric heat generation source
Run the case for different mesh sizes-12,8,6 and 4 mm
- Geometry
- Mesh
- Solution
- Setup
- Results
Please note that the following setup is being taken common for all cases
Setup
1. Solver-Density solver
2. Solver state-Steady state.
3. Turbulence Model-K-Epsilon Model
4.Inlet Velocity-4m/s
5 Volumetric Heat source=30000 W/m^3
6. Outlet Pressure-0 Pascals
-> Answer of question number 2
While simulating the BTMS, it is not fine to use any solid material because the battery manufacturer would have specified the material that is being used for the battery cells. But for the simulation purpose it should be seen that the material should have certain thermal properties to conduct the heat easily to the cooling liquid in the battery pack
-> Answer of question number 4
It was observed that while iterating for 1000 times, result start converging after 900 iterations
EXCEL CALCULATOR USED IN THIS PROJECT
BTMS simulation for mesh size = 12mm
GEOMETRY
MESH
RESIDUAL PLOT
VOLUME AVERAGE TEMPERATURE PLOT
TEMPERATURE CONTOUR OF CELLS
VELOCITY CONTOUR PLOT
VELOCITY VOLUME RENDER
BTMS simulation for mesh size = 8mm
GEOMETRY
MESH
RESIDUAL PLOT
VOLUME AVERAGE TEMPERATURE PLOT
TEMPERATURE CONTOUR OF CELLS
VELOCITY CONTOUR PLOT
VELOCITY VOLUME RENDER
BTMS simulation for mesh size = 6mm
GEOMETRY
MESH
RESIDUAL PLOT
VOLUME AVERAGE TEMPERATURE PLOT
TEMPERATURE CONTOUR OF CELLS
VELOCITY CONTOUR PLOT
VELOCITY VOLUME RENDER
BTMS simulation for mesh size = 4mm
GEOMETRY
MESH
RESIDUAL PLOT
VOLUME AVERAGE TEMPERATURE PLOT
TEMPERATURE CONTOUR OF CELLS
VELOCITY CONTOUR PLOT
VELOCITY VOLUME RENDER
SIMULATION ACCURACY
When we compare all the 4 cases of the various contour plots, we can observe that if we refine the mesh to fine level we see an increase in the accuracy of the results. But after a certain mesh size the accuracy almost remains constant
CONCLUSION
The BTMS was simulated in various cases