How to implement the BC at the inlet with a decreasing gas velocity?

MFiX
#1

Hi Dear ALL,

I want to implement a BC at the column inlet at which the gas vekocity decreases with the time. What kind of *.f or keywords shoud I use? Thank you so much.

Best,
Leina

#2

See similar topics, you might find a solution.

#3

Gaoxi, thank you so much. I found the solution:)

#4

Hi Gaoxi, I got this when I am trying to compile usr1.f. This warning will affect the results? Thank you.

编译-ClockSkewDetected
编译-ClockSkewDetected1065×489 16.5 KB

#5

It seems that the clock on the build machine is out of sync with the timestamps on the source files. (you might find a solution online)

I suggest:

make clean ! to remove previous .o files
make -j ! make again and try

#6

Yes, the warning disappears when I try:
make clean
make -j

Thank you :slight_smile:

#7

Hi Gaoxi, I got this error. Could you give me any reminder? Thank you.

output
output869×825 11 KB

I set BC at the inlet as follows
input
input911×618 11.6 KB

#8

Is that because bc_p_g(1)=101325 was not defined ?

#9

Thank Gaoxi. I will try it later.