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

ANSYS/CFX, MFX FSI: piezoelectric microfluidic channel pumping problem

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

LinkBack Thread Tools Search this Thread Display Modes
Old   December 12, 2011, 12:44
Default ANSYS/CFX, MFX FSI: piezoelectric microfluidic channel pumping problem
New Member
Join Date: Jan 2011
Posts: 13
Rep Power: 15
gogohusky is on a distinguished road
Dear all:

I'd like to thank singer1812 and stumpy first for their comments to help me run the MFX example in ANSYS manual.

I am trying to analyze a fluidic pumping problem in vibrational channel with ANSYS 12.1.
The vibration of the channel is actuated by piezoelectric material, PZT, with pairs of electrodes operating at different frequencies or phase shift.
(The idea is similar to this example:

Initially I thought I'd need transient fluid-solid interaction with ANSYS/CFX MFX because of the different frequencies in PZT actuation and the presence of fluid. (Maybe you can comment on this.)
I have followed closely on the 'Example Simulation of a Piezoelectric Actuated Micro-Pump' in the coupled-field manual.
So far I have finished the PZT-actaution part, but got stuck with the MFX procedure.
I don't really know how to apply the changing voltage load at different time steps in MFX.
I've searched past posts and the Verfication manual, but still not know how to solve my problem.
Maybe more experience users can kindly help me with this.

The sinusoidal voltage load I use on PZT for the structure part is applied through a DO loop.

[Example code]-----------------------
!constant setup
!Applied voltage
!Applied Frequency
!Time steps used in solution


!The first time step is applied through a ramped load to make sure a convegent step happens.
!Application of different voltages
voltage application to specific nodes)

!The following time steps are done in stepped load. Do loop ends at time=0.25 sec.
voltage application to specific nodes)


I am really confused about applying different time steps in the MFX /SOLU process.
Maybe someone can explain it with a sample code?
Or is there other better way of applying the sinusoidal voltage?

Thank you all for your help!


gogohusky is offline   Reply With Quote


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
Problem with laminar 2d channel flow Quarkz Main CFD Forum 6 October 7, 2015 12:24
FSI with MFX V. Kumar CFX 9 July 21, 2009 04:22
how to extend FSI 2D codes to 3D, need advises abouziar Main CFD Forum 1 May 30, 2008 04:08
FSI convergence problem YY CFX 0 April 13, 2008 10:54
Problem about FLUENT-MPCCI-ABAQUS FSI simulation! whpsoft FLUENT 0 May 24, 2006 10:22

All times are GMT -4. The time now is 18:02.