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

Archimedes screw turbine - non-physical results

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

Like Tree1Likes
  • 1 Post By Alberto Marasi

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 2, 2022, 20:35
Default Archimedes screw turbine - non-physical results
  #1
New Member
 
Alberto marasi
Join Date: May 2022
Posts: 1
Rep Power: 0
Alberto Marasi is on a distinguished road
Hi guys,
My master's thesis project consists in simulating an Archimedes screw turbine using ansys fluent CFD.
I imported the geometry from SOLIDWORKS, generated a good quality mesh, and set the fluent.
However, the torque generated by the simulation is excessively high, generating non-physical results (power generated by the turbine greater than the hydraulic one). What could be the problem?

I used the following settings:
Transient simulation
VOF implicit formulation (water + air)
K-w SST model
Mesh motion to simulate machine rotation (known rps)
Mass flow inlet (to set the inlet flow) Pressure outlet (to adjust the outlet flow) Second order upwind everywhere
Under relaxation factor 0.1
Flow courant number 50
Time step 0.005 sec.

Thank you
arnie333 likes this.
Alberto Marasi 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
URGENT! My Archimedes Screw turbine is not turning properly jassonsee FLOW-3D 2 August 6, 2020 14:14
bad heat transfer results with low y+ me45 OpenFOAM Running, Solving & CFD 0 April 29, 2020 12:56
not physical results at the mixing plane interface. andreaRocca OpenFOAM Running, Solving & CFD 0 November 4, 2019 12:07
Ducted wind turbine (BC for the shroud) Pepita CFX 4 June 29, 2013 08:09
wind turbine simulation, Ansys Post results question Laions CFX 7 September 20, 2011 06:13


All times are GMT -4. The time now is 17:26.