I am busy modeling batteries that heat up during use, and an airflow over the batteries to cool them. Each battery produces 12W of heat, according to the manufacturer. I have simulated it as a 2D problem, where the batteries are 100 by 200mm. The batteries are also 50mm deep but this cannot be seen in 2D.
I then defined a heat source and put a total power of 12W on each battery. However, I then realised Comsol models 2D as 3D as well, and uses a standard depth of 1 meter. Then my simulation would be incorrect as the heat is generated for a battery only 50mm deep.
I then decided to use the General source option under heat source. There I can define W/m3. Dividing 12W/(0,1*0,05*0,2)m3 = 12000 W/m3. Would this be the correct way of modeling the batteries as a heat source? It seems that applying the 12000W/m3 gives very high temperature values, much higher than I anticipate, so I started to doubt if it is correct.
I then defined a heat source and put a total power of 12W on each battery. However, I then realised Comsol models 2D as 3D as well, and uses a standard depth of 1 meter. Then my simulation would be incorrect as the heat is generated for a battery only 50mm deep.
I then decided to use the General source option under heat source. There I can define W/m3. Dividing 12W/(0,1*0,05*0,2)m3 = 12000 W/m3. Would this be the correct way of modeling the batteries as a heat source? It seems that applying the 12000W/m3 gives very high temperature values, much higher than I anticipate, so I started to doubt if it is correct.