simple spray problem

krishnag2002 · October 4, 2012, 01:31

Hello,

I am struggling with simple spray problem. If anybody aware of this please help me out.
in star.info file I am getting like this.
Time step = 2; Elapsed time = 2.000000E-05 s; Period = 1
================================================== ===============
*** Injection Subroutine: Status on Entry ***
Total Droplets : 0
Active Droplets : 0
Parent Droplets : 0
Stuck Droplets : 0
Deleted Droplets : 0
Total Liquid Mass : 0.0000

FUEL INJECTION AND NOZZLE MODELING
==================================

INJECTOR MASS INJECTED EFF. INJ. VEL. SPRAY ANGLE
1 0.0000 0.0000 0.0000

*** Injection Subroutine: Status on Exit ***
Total Droplets : 0
Active Droplets : 0
Parent Droplets : 0
Stuck Droplets : 0
Deleted Droplets : 0
Total Liquid Mass : 0.0000

I have defined a droplet and starting and stopping time massflow rate everything. but I can not able to see in sumulation. Can you pleas ehelp me out.

Thanks in advance.

Krishna

Pauli · October 4, 2012, 09:51

Is your spray start time > 2E-5 sec?

krishnag2002 · October 4, 2012, 22:45

I have given
starting time 0
stopping time 0.0015
time step 0.00001

Thanks for ur responce.

I got the mistake what i did.

I have given the parcel count very less. i e 200.
we need to give for each time step minimum one parcel is required. now i have given 3 laks/sec. so almost 3 drops per time step.

Thanks Pauli..

bye

October 4, 2012, 01:31	simple spray problem	#1
krishnag2002 New Member Krishna Join Date: Aug 2011 Location: Japan Posts: 26 Rep Power: 14	Hello, I am struggling with simple spray problem. If anybody aware of this please help me out. in star.info file I am getting like this. Time step = 2; Elapsed time = 2.000000E-05 s; Period = 1 ================================================== =============== * Injection Subroutine: Status on Entry * Total Droplets : 0 Active Droplets : 0 Parent Droplets : 0 Stuck Droplets : 0 Deleted Droplets : 0 Total Liquid Mass : 0.0000 FUEL INJECTION AND NOZZLE MODELING ================================== INJECTOR MASS INJECTED EFF. INJ. VEL. SPRAY ANGLE 1 0.0000 0.0000 0.0000 * Injection Subroutine: Status on Exit * Total Droplets : 0 Active Droplets : 0 Parent Droplets : 0 Stuck Droplets : 0 Deleted Droplets : 0 Total Liquid Mass : 0.0000 I have defined a droplet and starting and stopping time massflow rate everything. but I can not able to see in sumulation. Can you pleas ehelp me out. Thanks in advance. Krishna

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Simple mathematical problem?	Frank Wedburn	Main CFD Forum	8	March 23, 2012 17:26
Initial &Boundary conditions for pressure in cavity flow problem with SIMPLE approach	Mehdi-Sanaei	Main CFD Forum	0	May 7, 2011 04:02
Simple Impinging Fountain problem	MarkK	CFX	4	February 5, 2011 05:30
A simple heat transfer problem ?	iggor	FLUENT	1	June 15, 2009 04:42
? Simple CFD problem	Davy	Main CFD Forum	0	August 21, 1998 06:19

October 4, 2012, 09:51		#2
Pauli Senior Member Pauli Join Date: Mar 2009 Posts: 189 Rep Power: 17	Is your spray start time > 2E-5 sec?

October 4, 2012, 22:45		#3
krishnag2002 New Member Krishna Join Date: Aug 2011 Location: Japan Posts: 26 Rep Power: 14	I have given starting time 0 stopping time 0.0015 time step 0.00001 Thanks for ur responce. I got the mistake what i did. I have given the parcel count very less. i e 200. we need to give for each time step minimum one parcel is required. now i have given 3 laks/sec. so almost 3 drops per time step. Thanks Pauli.. bye