How to set maximum solid volume fraction in MFIX-DEM

MFiX
#1

Hi Dear All,

I want to set the maximum solid volume fraction in MFIX-DEM by mfix.dat. No GUI is used. So which key parameter shoudl I use? Or what is the default value of the maximum solid volume fraction? Thank you so much.

Best wishes,
Leina

1 Like
#2

Try the keyword EP_STAR, the gas phase volume fraction in a cell is computed as
EP_G(IJK) = ONE - min(PACKED_EPS, SUM_EPS)

where,

 PACKED_EPS = ONE
  IF(MPPIC) THEN
     PACKED_EPS = 0.9D0
  ELSEIF(EP_STAR/=UNDEFINED) THEN
     PACKED_EPS = ONE - EP_STAR
  ENDIF
3 Likes
#3

Gaoxi, thank you for your response. I will try it.