[Clarence91]

hi everyone,

Iam using MESH MOTION for my case and I have 4 injections from the inlet.

I made several changes in the parameters according to my problem but still I have few qn.s

1) In setting the injections I see DEM COLLISION PARTNER, where in I have options like dem-aluminium, dem-bounce and dem-np, dem-pp (np and pp are the particles). I dont understand what do I set for DEM COLLISION PARTNER in 4 injections. Can you let me know what are these?
By default each injection will have some or the other DEM COLLISION PARTNER by in reality each can collide with other type of particles, may be n-number of times. (eg. particle A can collide with particle B and them these two particles can go and collide with other particles say C or D or E and so on)


2) According to FLUENT USER GUIDE 14.5, Section 16.2. Finding the spring constant is given by a formula, but I dont know how to calculate it. What can be the value of "fraction of diameter for allowable overlap" or "relative velocity" ?????

(I tried with the default values but still I get weird results. eg. Max.velocity should be somewhere around 5m/s to 8m/s but in my vector-plot I see 1.034e+3 which is impossible)

Thanks in advance.
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