CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

DPM Evaporation mass balance problem

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   July 2, 2015, 21:14
Default DPM Evaporation mass balance problem
  #1
New Member
 
HYUNGSIK UM
Join Date: Jun 2015
Posts: 3
Rep Power: 3
herr010 is on a distinguished road
Hello!!

I am running DPM simulation using 2-D Axisymmetric, Multicomponent Model.

I injec water-urea solution about 0.00038 kg/s and 380 parcels with 0.01 sec timestep.

I found that every injected particles are evaporated!! the temperature and the residance time is enough to evaporate every particles No escaped, No aborted, only evaportaed.

But when I see a 'mass flux report' , DPM Mass source is 0.000288 kg/s.

There is a big diffence between the mass I injected and the mass evapored in the domain.

I tried same simulation using a more dense mesh with double precision, the result is same.

how can i fix this?
herr010 is offline   Reply With Quote

Old   July 2, 2015, 22:37
Default
  #2
New Member
 
HYUNGSIK UM
Join Date: Jun 2015
Posts: 3
Rep Power: 3
herr010 is on a distinguished road
Now, I am running same simulation on 3-dimensional mesh with same setting.

I found that the mass balance is correct.

The mass of evarporated particles is same to what I setting on boundary condition.

I think this problem is orruring at 2-dimensional axisymmetic.
herr010 is offline   Reply With Quote

Reply

Tags
dpm, evaporation, mass

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mass and energy source - evaporation neilduffy1024 ANSYS 4 July 16, 2013 23:50
combustion problem mcnair CFX 9 March 22, 2011 15:06
mass flow in is not equal to mass flow out saii CFX 2 September 18, 2009 08:07
Mass balance problem! JADG FLUENT 4 December 27, 2003 11:40
Heat and mass balance problem Laurent FLUENT 2 October 15, 2002 10:52


All times are GMT -4. The time now is 13:28.