vof_spray.out

stef_ · May 12, 2021, 11:51

Hi everybody,
I am simulating an airblast nozzle on CONVERGE, thanks to the VOF-spray one-way coupling method.
I have already run the vof simulation but the vof_spray.out file is empty, even if the interval time for writing this file is already exceeded.
Has anyone faced this issue before?

best regards,

stef_

psrikanth · May 14, 2021, 19:40

Hi Stefania,

It is odd that the vof_spray.out file is empty. The most obvious thing to check would be with the vof_spray.in file that you set up. You could look at the Spray G example case to see how to set up the case.

Praveen

HengLiu · August 19, 2021, 03:19

Hi Praveen
Sorry to bother.I have run the spray G example and got the spray.out file. Also, I changed the name to"vof_spray.dat" when i carried a Lagrangian simulation using the case setup of example"sprayG_Lagrangian_LES".
However,the spray.out file shows that "tot_parcels" are zero all the time.Could you give me some advice about it? Thank you.
Best regards.

Yaju · August 23, 2021, 13:42

Hi HengLiu,

Are you trying to run a Spray VOF one-way coupling case or just a normal Lagrangian case?

If you want to run a one-way coupling case, then you first need to run the internal nozzle flow simulation using VOF. You will also need to activate the vof_spray.out output. The vof_spray.out generated form the VOF simulation can then be used in a one-way coupling case to initiate Lagrangian parcels.

If you want to use the example case to replicate the above process, then run the "ECN Spray G VOF transient RANS" case first. This will generate a vof_spray.out file, rename this file to "vof_spray.dat" and use it to run the "ECN Spray G one-way coupling transient RANS" example case.

I hope this explains the procedure.

May 12, 2021, 11:51	vof_spray.out	#1
stef_ New Member Stefania Siragusa Join Date: May 2021 Posts: 1 Rep Power: 0	Hi everybody, I am simulating an airblast nozzle on CONVERGE, thanks to the VOF-spray one-way coupling method. I have already run the vof simulation but the vof_spray.out file is empty, even if the interval time for writing this file is already exceeded. Has anyone faced this issue before? best regards, stef_

August 23, 2021, 13:42		#4
Yaju Member Yajuvendra Shekhawat Join Date: Mar 2017 Location: Convergent Science, Madison WI Posts: 51 Rep Power: 9	Hi HengLiu, Are you trying to run a Spray VOF one-way coupling case or just a normal Lagrangian case? If you want to run a one-way coupling case, then you first need to run the internal nozzle flow simulation using VOF. You will also need to activate the vof_spray.out output. The vof_spray.out generated form the VOF simulation can then be used in a one-way coupling case to initiate Lagrangian parcels. If you want to use the example case to replicate the above process, then run the "ECN Spray G VOF transient RANS" case first. This will generate a vof_spray.out file, rename this file to "vof_spray.dat" and use it to run the "ECN Spray G one-way coupling transient RANS" example case. I hope this explains the procedure. __________________ Yajuvendra Shekhawat Research Engineer - Applications Group CONVERGECFD

May 14, 2021, 19:40		#2
psrikanth New Member Praveen Srikanth Join Date: May 2021 Location: Convergent Science, Madison, WI Posts: 19 Rep Power: 5	Hi Stefania, It is odd that the vof_spray.out file is empty. The most obvious thing to check would be with the vof_spray.in file that you set up. You could look at the Spray G example case to see how to set up the case. Praveen

August 19, 2021, 03:19		#3
HengLiu New Member Join Date: May 2021 Location: Tianjin,China Posts: 10 Rep Power: 5	Hi Praveen Sorry to bother.I have run the spray G example and got the spray.out file. Also, I changed the name to"vof_spray.dat" when i carried a Lagrangian simulation using the case setup of example"sprayG_Lagrangian_LES". However,the spray.out file shows that "tot_parcels" are zero all the time.Could you give me some advice about it? Thank you. Best regards.