CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Medical robot simulation

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

LinkBack Thread Tools Search this Thread Display Modes
Old   April 9, 2015, 07:11
Post Medical robot simulation
New Member
Ahmed Abdel Samad
Join Date: Apr 2015
Posts: 4
Rep Power: 9
3absamad is on a distinguished road
Hello Everyone, I'm currently doing my bachelor's degree in Mechatronics and we are having a really tough time in our project.

I am simulating a micro-robot in a fluid flow to be able to understand it's propulsion characteristics throughout the drag forces that occur on this micro-swimmer.

Basically my problem is that I never used ANSYS, and the simulation results are always wrong and not repeatable for different rotational values. let me explain what I have to simulate so you have a good understanding:
a helical micro-robot, a robot which rotates around itself because of outer magnetic field thus from rotating at different RPMs different axial velocities are achieved it's basically like a screw rotation, but in fluid. the shape is very simple a helix attached to a very small cylinder magnet nothing more.

I have the geometry from solid-works, mesh it on ANSYS and setup the problem but I have no idea if it's correct setup or not:

I use the following:

1. K-epsilon model with default values
2. velocity inlet (either 1 or 2 m/s values, gauge pressure 0)
3. pressure outlet with 0 gauge pressure
4. Fluid is glycerin whatever it doesn't really matter
5. I use pressure based solver

and the robot itself is read as a wall, additionally rotates around the (1,0,0) axes with 10 rad/s (at this point I need to simulate different values for rotational speed for a graph plot of the behavior)
I also use a screen monitor for the Drag coefficient.
I specify 1000 iterations but at after 280 it says Solution is converged!

Any idea where did I go wrong? I'm pretty sure in almost everything but I have zero knowledge with ANSYS and I have to have results and valid ones specially I have to publish a paper, also if anyone has recommendation or able to help with problem setup I would be really glad.
3absamad is offline   Reply With Quote


cfd consulting, fluid dynamics, fluid flow, rigid body motion

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
Waterbell Simulation o.b.m Fluent Multiphase 1 November 5, 2015 06:55
setting up a simulation with multiple interactions phandy OpenFOAM Running, Solving & CFD 1 October 6, 2014 04:16
mass flow rate issue in supersonic nozzle simulation xkang FLUENT 0 July 31, 2014 17:06
Simulation of a complex wing in solidworks flow simulation niels1900 FloEFD, FloWorks & FloTHERM 6 April 20, 2011 11:44
Continuous vs interrupted simulation sega OpenFOAM Running, Solving & CFD 4 November 3, 2008 15:29

All times are GMT -4. The time now is 07:21.