How to plot and calculate species velocity individually?
Sorry, it is me again...
I just have another problem. In my case, it is a 3d particle located in the origin point with reaction. So, there is reactant coming in and products coming out.
First question is should I use radial velocity to present direction and magnitude? Because the velocity magnitude can not give me direction. But why I get plot like this? Should it be all positive value since all narrows are going out in the vector plot.
The second question is how to plot and calculate species velocity individually? once I calculate flow rate on the surface by "surface report" - "flow rate" - "mass fraction of XX", I will get the value with same positive sign for both reactant and product which seems unreasonable.