relative acceleration implementation cfx

gyr · March 18, 2023, 03:11

hi everybody,
my issue is implementation of acceleration of droplet or bubble in eulerian multiphase mixture model.the error returned is slip velocity u,w,v does not have a required component prefix.if add phase prefix another error
is not allowed to have a phase prefix.i tried all prefixes,components but no luck.i know that the local derivative needs user_getvar but itis not my problem.the problem is how implement it in CFX CEL language

ghorrocks · March 18, 2023, 04:02

Can I ask why do you want the slip velocity acceleration?

gyr · March 18, 2023, 04:14

to calculate dispersed phase size

ghorrocks · March 18, 2023, 04:51

Can you define your terms? What is rmax b, rmax d, Erds, accel delta rho etc?

gyr · March 18, 2023, 04:58

density difference between air and water.for equations rmax b , rmax d ara maximum droplet size and maximum bubble size in metre.sigma is interfacial tension

gyr · March 18, 2023, 05:01

Accel is the acceleration to be required

March 18, 2023, 03:11	relative acceleration implementation cfx	#1
gyr New Member libya Join Date: Aug 2022 Posts: 15 Rep Power: 3	hi everybody, my issue is implementation of acceleration of droplet or bubble in eulerian multiphase mixture model.the error returned is slip velocity u,w,v does not have a required component prefix.if add phase prefix another error is not allowed to have a phase prefix.i tried all prefixes,components but no luck.i know that the local derivative needs user_getvar but itis not my problem.the problem is how implement it in CFX CEL language Last edited by gyr; March 19, 2023 at 03:28.

March 18, 2023, 04:02		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Can I ask why do you want the slip velocity acceleration? __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

March 18, 2023, 04:14		#3
gyr New Member libya Join Date: Aug 2022 Posts: 15 Rep Power: 3	to calculate dispersed phase size Last edited by gyr; March 21, 2023 at 03:20.

March 18, 2023, 04:51		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Can you define your terms? What is rmax b, rmax d, Erds, accel delta rho etc? __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

March 18, 2023, 04:58		#5
gyr New Member libya Join Date: Aug 2022 Posts: 15 Rep Power: 3	density difference between air and water.for equations rmax b , rmax d ara maximum droplet size and maximum bubble size in metre.sigma is interfacial tension Last edited by gyr; March 21, 2023 at 03:20. Reason: explanation

March 18, 2023, 05:01		#6
gyr New Member libya Join Date: Aug 2022 Posts: 15 Rep Power: 3	Accel is the acceleration to be required

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