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

Flow through hydrostatic bearing

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 20, 2020, 05:43
Default Flow through hydrostatic bearing
  #1
New Member
 
Akhil
Join Date: Jul 2020
Posts: 3
Rep Power: 2
Akhil9611 is on a distinguished road
Hello,

I am working on a hydrostatic thrust bearing with a single circular recess. The fluid, ISOVG22 is flowing inside the hydrostatic bearing. I will attach the geometry of the thrust bearing with this email. The fluid is flowing through the inlet at 5m/s, velocity inlet. Circular recess pressure was calculated to be 111300 pa for a 15 mm film thickness. Laminar flow, non-newtonian and in-compressible fluid is assumed. Ambient temperature is neglected. Outlet pressure is 101325 pa. I also want to apply a load of 127.51 N on the top of the bearing surface. A rotational speed of 600rpm is also provided. My end goal is the angular velocity of the fluid in these conditions.

Geometry description : inlet radius = 5mm
recess radius = 50mm
bearing radius = 75mm
As per calculation from MATLAB it was found out that maximum radial velocity for this case is 34.91 m/s. I want to simulate and verify this answer on ANSYS Fluent.
3-D model.jpg
Akhil9611 is offline   Reply With Quote

Old   July 20, 2020, 09:02
Default
  #2
Senior Member
 
karachun's Avatar
 
Alexander Karachun
Join Date: Nov 2015
Location: Mykolaiv, Ukraine
Posts: 134
Rep Power: 6
karachun is on a distinguished road
So you want someone to make calculations for you?
Well, good luck!
karachun is offline   Reply With Quote

Old   July 20, 2020, 10:49
Default
  #3
New Member
 
Akhil
Join Date: Jul 2020
Posts: 3
Rep Power: 2
Akhil9611 is on a distinguished road
I don't want anyone to do the calculations. I've already done it. I want someone to suggest me how to apply the load on the bearing surface.
Akhil9611 is offline   Reply With Quote

Old   July 20, 2020, 11:33
Default
  #4
Senior Member
 
karachun's Avatar
 
Alexander Karachun
Join Date: Nov 2015
Location: Mykolaiv, Ukraine
Posts: 134
Rep Power: 6
karachun is on a distinguished road
Use Deforming Mesh and 6DOF solver.
Or you can vary gap (change CAD geometry) and check force on bearing surface.
karachun is offline   Reply With Quote

Old   July 23, 2020, 14:58
Default
  #5
Senior Member
 
Erik
Join Date: Feb 2011
Location: Earth (Land portion)
Posts: 964
Rep Power: 18
evcelica is on a distinguished road
Alexander is correct.
You can change the CAD geometry, or use a static mesh deformation in CFD Pre to vary your gap thickness.
Use 0 Pa relative pressure on outlet, or make sure you take into account the increased static pressure in your force calculation.
Consider using symmetry or axisymmetric in Fluent.
evcelica is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bearing simulation outlet pressure Tierce CFX 1 October 31, 2018 16:00
Regarding determinng the absolute hydrostatic pressure for air+water flow in a closed er_ijaz OpenFOAM 0 September 18, 2018 00:11
flow over a cylinder urgent! kevin FLUENT 8 August 11, 2015 13:00
Vertical 2D, Variable density flow with hydrostatic pressure assumption ehsansh89 Main CFD Forum 6 May 24, 2014 13:09
Non-steady flow simplified for use in Vissim steamerandy Main CFD Forum 0 October 31, 2011 21:08


All times are GMT -4. The time now is 17:18.