the units of particle erosion rate in CFX
 

how to change the units of particle erosion rate show in cfx. the units is [kg m^-2 S-1] now, I want to change it to [(mg/g)/cm^2]. i tried to achieve it by "extra output variables", but failed.

You are comparing erosion rate density with erosion rate.

Thanks, but I cannot find the output variable "erosion rate". I can only find the "erosion rate density" when I create a contour.

You can make your own variable on variables tab.

Thank you for your suggestion. I try to make a variable = [Paticle Erosion Rate Density]/[Particle.Wall Mass Flow Density]. but it's error. Do you have more specific suggestion about the user variable. Thanks!

Dunno. What kind of error?

Thank you Antanas! The variable can be made successfully. but I can not show it in a contour for the follow reason (Fig.1). Then, I find the value of [Particle.Wall Mass Flow Density] is zero on the Wall(R1 Blade). I think that the reason is because all particles impact on Wall are rebounded. So the value is zero. What are your thoughts? Besides, do you have any better suggestions about how to define the variable[erosion rate]?

hello,Bruce Xiao
please i am working on the erosion in turbomachine,I wonder if you got a solution for your problem