Spray modeling with Fluent

ulalala · April 26, 2012, 02:05

HI,

I am trying to do a spray simulation for the first time with Fluent. I have applied all the DPM setting and defined injection parameters.
But when the run starts, it is not able to retain any of the spray particles.

Can anyone please suggest what am I missing here.

Thanks

nayn · April 26, 2012, 10:48

It is hard to say. I had the same problem before. Maybe the boundary condition--DPM and maybe something else.

AdarshGouda · March 18, 2013, 05:16

Quote:

Originally Posted by ulalala

HI,

I am trying to do a spray simulation for the first time with Fluent. I have applied all the DPM setting and defined injection parameters.
But when the run starts, it is not able to retain any of the spray particles.

Can anyone please suggest what am I missing here.

Thanks

Did you sucessfully model it in Fluent??

diamondx · March 18, 2013, 10:52

if you are using unsteady injection, there is a start time and stop time. if you stop time is zero, it will stop injection right away. make sure your stop time is 1e99

AdarshGouda · March 18, 2013, 11:09

Quote:

Originally Posted by diamondx

if you are using unsteady injection, there is a start time and stop time. if you stop time is zero, it will stop injection right away. make sure your stop time is 1e99

Thank You very much sir... I had the difficulty in recognizing the stop time. You precisely figured out my problem... Hats off!!

Can you please share your simulation parameters/step or some tutorial which is simple to understand...

Thanks a ton again.

Adarsh.

oj.bulmer · March 18, 2013, 11:13

Did you mean 10e99? 1e99 is same as 1.
Also, is this true for CFX as well?

OJ

AdarshGouda · March 18, 2013, 11:17

Quote:

Originally Posted by oj.bulmer

Did you mean 10e99? 1e99 is same as 1.
Also, is this true for CFX as well?

OJ

1e99 = 1*10^99

AdarshGouda · March 18, 2013, 11:18

Quote:

Originally Posted by AdarshGouda

1e99 = 1*10^99

Sir are you too working on spray modelling?

diamondx · March 18, 2013, 11:28

by that i meant a very big time, so injection can never stops. yes i do some injections too in fluent, but not really a master in this field...

AdarshGouda · March 18, 2013, 11:34

I'm trying to simulate mist/spray cooling on a heated surface... and spray is totally new to me... went thru few tutorials in fluent all seem very complicated and irrelevant to my simulation... Can you please provide is with a simple tutorial or reference just to simulate a simple spray first... I know to inject bubble in a liquid flow as i have worked bubbly flow... but no idea about spray... please helppp!!

oj.bulmer · March 18, 2013, 11:39

Haha, sorry about that. Been a long day at work it seems for me!

Cheers
OJ

AdarshGouda · March 18, 2013, 11:45

Happens!! We all loose it once in a while...

But please share some information with me regarding this if u have any. It would be of great help to me... I'm struggling a lot with this...

oj.bulmer · March 18, 2013, 12:40

Why not start with tutorial "Evaporating Spray Injection?" You can pick up the pieces from its instructions and create a spray in a simple geometry, say pipe, without modelling any other physics in that tutorial. Try this first to simulate sensible spray and then you can incorporate this into your model.

It is wise to go one step at a time, as you are going.

OJ

AdarshGouda · March 18, 2013, 12:47

Quote:

Originally Posted by oj.bulmer

Why not start with tutorial "Evaporating Spray Injection?" You can pick up the pieces from its instructions and create a spray in a simple geometry, say pipe, without modelling any other physics in that tutorial. Try this first to simulate sensible spray and then you can incorporate this into your model.

It is wise to go one step at a time, as you are going.

OJ

Yess Sir, I saw that tutorial. There are too many domains in that tutorial.. So i dont know which parameters to consider and which to neglect... I guess i have to start studying automizers to understand the functioning of it and then see the tutorial and then model a simple based on that... Should take some time for me...

diamondx · March 18, 2013, 12:55

try this http://www.engr.uconn.edu/~ewebhk/bu...s/tutor910.pdf

AdarshGouda · March 18, 2013, 13:00

Quote:

Originally Posted by diamondx

try this http://www.engr.uconn.edu/~ewebhk/bu...s/tutor910.pdf

Thank you Thank you Thank you Thank you Thank you Thank you....

Just the thing i was hoping for.. Made my day!! God!!! Thanks a tonnnnnnnnn....

muz_cfd · July 2, 2013, 09:36

The link is dead....

send it again.

onlylno · July 21, 2013, 02:35

Quote:

Originally Posted by AdarshGouda

Thank you Thank you Thank you Thank you Thank you Thank you....

Just the thing i was hoping for.. Made my day!! God!!! Thanks a tonnnnnnnnn....

can you send me this documents? yujiehust@hotmail.com
Thank you!

MAC88 · November 26, 2013, 04:53

I need this document too.
can you please send this on
m.chishty@student.unsw.edu.au

Thank you.

Vidyanand Kesti · November 26, 2013, 08:42

please sen me too
vidyanand.kesti@mann-hummel.com

April 26, 2012, 02:05	Spray modeling with Fluent	#1
ulalala New Member SAUMYA Join Date: Jun 2010 Location: PUNE, INDIA Posts: 16 Rep Power: 16	HI, I am trying to do a spray simulation for the first time with Fluent. I have applied all the DPM setting and defined injection parameters. But when the run starts, it is not able to retain any of the spray particles. Can anyone please suggest what am I missing here. Thanks

March 18, 2013, 10:52		#4
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	if you are using unsteady injection, there is a start time and stop time. if you stop time is zero, it will stop injection right away. make sure your stop time is 1e99 __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

March 18, 2013, 11:28		#9
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	by that i meant a very big time, so injection can never stops. yes i do some injections too in fluent, but not really a master in this field... __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali Last edited by diamondx; March 24, 2015 at 09:25.

March 18, 2013, 12:55		#15
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	try this http://www.engr.uconn.edu/~ewebhk/bu...s/tutor910.pdf __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

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April 26, 2012, 10:48		#2
nayn New Member Na Zhao Join Date: Apr 2012 Posts: 2 Rep Power: 0	It is hard to say. I had the same problem before. Maybe the boundary condition--DPM and maybe something else.

March 18, 2013, 11:13		#6
oj.bulmer Senior Member OJ Join Date: Apr 2012 Location: United Kindom Posts: 473 Rep Power: 20	Did you mean 10e99? 1e99 is same as 1. Also, is this true for CFX as well? OJ

March 18, 2013, 11:34		#10
AdarshGouda New Member Adarsh Gouda Join Date: Feb 2013 Location: Singapore Posts: 13 Rep Power: 13	I'm trying to simulate mist/spray cooling on a heated surface... and spray is totally new to me... went thru few tutorials in fluent all seem very complicated and irrelevant to my simulation... Can you please provide is with a simple tutorial or reference just to simulate a simple spray first... I know to inject bubble in a liquid flow as i have worked bubbly flow... but no idea about spray... please helppp!!

March 18, 2013, 11:39		#11
oj.bulmer Senior Member OJ Join Date: Apr 2012 Location: United Kindom Posts: 473 Rep Power: 20	Haha, sorry about that. Been a long day at work it seems for me! Cheers OJ

March 18, 2013, 11:45		#12
AdarshGouda New Member Adarsh Gouda Join Date: Feb 2013 Location: Singapore Posts: 13 Rep Power: 13	Happens!! We all loose it once in a while... But please share some information with me regarding this if u have any. It would be of great help to me... I'm struggling a lot with this...

March 18, 2013, 12:40		#13
oj.bulmer Senior Member OJ Join Date: Apr 2012 Location: United Kindom Posts: 473 Rep Power: 20	Why not start with tutorial "Evaporating Spray Injection?" You can pick up the pieces from its instructions and create a spray in a simple geometry, say pipe, without modelling any other physics in that tutorial. Try this first to simulate sensible spray and then you can incorporate this into your model. It is wise to go one step at a time, as you are going. OJ

July 2, 2013, 09:36		#17
muz_cfd New Member Syed Muzammil Hussain Join Date: Jun 2013 Posts: 4 Rep Power: 13	The link is dead.... send it again.

November 26, 2013, 04:53		#19
MAC88 New Member Muhammad Aqib Chishty Join Date: May 2013 Location: Islamabad, Pakistan Posts: 23 Rep Power: 0	I need this document too. can you please send this on m.chishty@student.unsw.edu.au Thank you.

November 26, 2013, 08:42		#20
Vidyanand Kesti Member vidyanand Join Date: Nov 2011 Location: bangalore,india Posts: 66 Rep Power: 17	please sen me too vidyanand.kesti@mann-hummel.com