CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[GAMBIT] Water Slosing in Water Tank

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 11, 2013, 20:46
Default Water Slosing in Water Tank
  #1
New Member
 
iwan kurniawan
Join Date: Jun 2013
Posts: 7
Rep Power: 4
iwan is on a distinguished road
Dear All,
I have project for my thesis. I'm trying to run simulation for water sloshing in water tank.
But i'm not sure when i mesh model in Gambit.

Step by step in Gambit:
1. Create Tank Geometry
2. Create Face
3. Create Mesh Edges
Type : Succesive Ratio
Ratio : 1
Spacing :40
4. Create Mesh Faces
Scheme :Apply
Elements :Quad
Type :Map
Smoother:None
Interval size : 1
5. Examine Mesh
Display Type:Range
2D Element
Quality Type:EquiAngle Skew
I got the worst element quality value 0,89254

6. Specify Boundary Types
all edges of tank are WALL
7. Specifiy Continuum Types
need i set this step?please give me advise
8. Export Mesh


Can anyone give me correction for the steps?I really need help for my thesis. Many Thanks all

iwan is offline   Reply With Quote

Old   October 12, 2013, 06:10
Default
  #2
Senior Member
 
ghost82's Avatar
 
Daniele
Join Date: Oct 2010
Location: Italy
Posts: 918
Rep Power: 15
ghost82 will become famous soon enough
There is lack of data: is your simulation 2d or 3d?
What are your specific problems?
If your question is related to continuum type, if you use vof, I would set 2 different continuum types (i.e. create 2 faces (if 2d) or 2 volumes (if 3d)), water and air: this will help you when you have to initialize the solution in fluent.

Daniele
ghost82 is offline   Reply With Quote

Old   October 12, 2013, 19:33
Default
  #3
New Member
 
iwan kurniawan
Join Date: Jun 2013
Posts: 7
Rep Power: 4
iwan is on a distinguished road
Quote:
Originally Posted by ghost82 View Post
There is lack of data: is your simulation 2d or 3d?
What are your specific problems?
If your question is related to continuum type, if you use vof, I would set 2 different continuum types (i.e. create 2 faces (if 2d) or 2 volumes (if 3d)), water and air: this will help you when you have to initialize the solution in fluent.

Daniele
Hi Daniele,
Thanks for your quick response.
My thesis is 2D Simulation.First,I will make simulation for lateral sloshing force and moment in tank "without baffle" with 30%,50%,70% and 90% fill level of water in tank.Then,I will make sloshing simulation with different baffle design (horizontal,vertical,diagonal,horizontal-vertical) in tank with 30%,50%,70% and 90% fill level of water in tank. Finally, i get force and moment sloshing in tank for without baffle tank and tank with different baffle,I make comparison between sloshing in without baffle tank and with baffle tank and i know the best baffle design and effect of baffle on damping lateral fluid sloshing.

I will use VOF for my simulation.
for example,
for tank with 70% fill level of water, i will create stright edge on 70% tank height, then create face, bottom face for water and top face for air.Correct?

Many thanks Daniele
iwan is offline   Reply With Quote

Old   October 13, 2013, 03:40
Default
  #4
Senior Member
 
ghost82's Avatar
 
Daniele
Join Date: Oct 2010
Location: Italy
Posts: 918
Rep Power: 15
ghost82 will become famous soon enough
Yes correct,
however this is not necessary, as you can mark region (square) directly in fluent and patch that region after initializing.
For continuum type: if you split your domain into 2 regions, set 2 continuum types (water and air), if you don't split it, set a single continuum type (ex: water) and you will split the domain after in fluent as I wrote before.

Daniele
ghost82 is offline   Reply With Quote

Old   October 17, 2013, 18:25
Default
  #5
New Member
 
iwan kurniawan
Join Date: Jun 2013
Posts: 7
Rep Power: 4
iwan is on a distinguished road
Quote:
Originally Posted by ghost82 View Post
Yes correct,
however this is not necessary, as you can mark region (square) directly in fluent and patch that region after initializing.
For continuum type: if you split your domain into 2 regions, set 2 continuum types (water and air), if you don't split it, set a single continuum type (ex: water) and you will split the domain after in fluent as I wrote before.

Daniele
Okey Daniele,
I think more effective spilt in Fluent,because i will use mesh file for different fill level in tank.
Many thanks Daniele,i will try to set continuum type,then we will discuss again
iwan is offline   Reply With Quote

Reply

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
Simple Water Tank Transient 88phil88 CFX 5 March 17, 2014 04:48
Mixture and Decay of a tracer in a Water Tank Jeffrey1992 CFX 2 July 27, 2012 13:31
Filling Tank with Water leff CFX 5 October 1, 2011 09:30
modeling spilling of water from a tank jemteo CFX 6 June 25, 2006 19:33
uptodate water distribution network fredius,magige,tanzanian,(e.a) Main CFD Forum 0 January 27, 2002 08:10


All times are GMT -4. The time now is 22:43.