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How to make simulation of body force in plasma actuator induce flow? |
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May 10, 2010, 06:07 |
How to make simulation of body force in plasma actuator induce flow?
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#1 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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This is a forum and place of discussion. But, most of the tread still blank and no comments. Please share your suggestion. I have submit some of my problem but response is not good. Please reply.
I wanna simulate the body force of a flow induced by plasma actuator. How is it possible in phoenics? Is there any sample q1 in the phoenics library??? Please help me |
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May 10, 2010, 07:01 |
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#2 |
New Member
Join Date: May 2009
Location: Germany
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Hi Mukut,
your Problem is very specific. What are your problems exactly? Be more specific. Have you problems by modelling the plasma or donīt you know how to calculate the forces on a body? Iīm not familiar with flow induced by plasma actuator, not even knowing what a plasma actuator is. Maybe the community can help by solving your problems step by step, when you ask more specific! Linh |
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May 10, 2010, 08:04 |
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#3 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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I have already started experiment and collects data using single Dielectric Barrier Discharge plasma actuator.Experimental setup looks like as follow. I need to make
setup in the phoenics domain and find out velocity, body force etc |
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June 6, 2010, 14:15 |
How to Estimate Body force due to plasma actuator emperically
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#4 |
New Member
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Hi!!,
I am trying to model the effect of DBD based plasma actuator for my Thesis. Does anyone have any clue on how to accomplish this in Fluent or for that matter how to estimate the body force based on the specs of the DBD. Regards Soumendu |
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June 7, 2010, 06:31 |
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#5 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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No one give idea or at least any suggestion. I am really surprised, what kind of discussion group is it? If the experts do not help or give suggestion to the newcomer, how can it be fruitful? Please give suggestion and advice.
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July 6, 2010, 14:43 |
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#6 | |
New Member
Richard
Join Date: Jul 2010
Posts: 10
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Quote:
How do you simulate the electrical field as well as plasma field in PHOENICS ? Do you use PHOENICS-CVD? What is the function formula of the body force ? Best regards Richard |
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July 6, 2010, 21:32 |
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#7 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
Posts: 124
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Dear Richard!
Thanks for knocking. What is phoenics-CVD? I am trying to simulate both electrical and plasma field. [IMG]file:///C:/DOCUME%7E1/mukut/LOCALS%7E1/Temp/moz-screenshot.png[/IMG] Above pic shows the solution domain (I am trying to make such type of domain in phoenics, I have taken it from a research paper and the author used FLUENT for simulation). The body force eqn. as stated in figure. According to figure, in the doamin I have to insert a bottom electrode in the dielectric material, but how can I make it?? Till now I am trying to make such domain....using a simple boundary condition to calculate electric potential(but I need 2nd order eqn as B. condition [check the thread link])....In my created domain there is only dielectric and upper domain contains air (like pic), but how can I define upper and bottom electrode.........still crawling... Can you please give me some suggestion plz?? Thnx Please check this thread also (http://www.cfd-online.com/Forums/pho...-phoenics.html) |
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July 8, 2010, 01:00 |
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#8 |
New Member
Richard
Join Date: Jul 2010
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Hi Mukut,
The PHOENICS-CVD is the special purpose version of PHOENICS which is used for chemical vapor deposition process in semi-cond. or optoelectronics industries. It's function includes plasma simulation.(used for plasma enhanced CVD) You can directly use this module and should be easier rather than you develop the user subroutine for electrical field as well as plasma field (including electrons density, ions density as well as electrons temperature and ion temperature). You can see the introduction of PHOENICS-CVD from this link http://www.cham.co.uk/DOCS/cham_product_update_CVD.pdf And the body force is dependent on the electrical field, you shall calculate the electrical field at first and then set the momentum force as the function of electrical field. Use the command patch(bdfc, volume, 0, 0, 0, 0, 0, 0, 1, lstep) (source of u1 at bdfc is f(e) with fixv) (source of v1 at bdfc is f(e) with fixv) (source of w1 at bdfc is f(e) with fixv) where f(e) is the function of electrical field potential |
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July 8, 2010, 03:10 |
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#9 | |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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Quote:
thanks a lot for your every reply. In my university we use phoenics version 2007 I have to ask computer center that is it available or not. mukut |
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July 8, 2010, 04:09 |
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#10 |
New Member
Richard
Join Date: Jul 2010
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Hi Mukut,
(source of u1 at bdfc is f(e) with fixv) (source of v1 at bdfc is f(e) with fixv) (source of w1 at bdfc is f(e) with fixv) It should be corrected as below. (source of u1 at bdfc is f(e) with fixflu) (source of v1 at bdfc is f(e) with fixflu) (source of w1 at bdfc is f(e) with fixflu) |
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July 8, 2010, 04:31 |
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#11 |
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Richard
Join Date: Jul 2010
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Hi Mukut,
There are many information regarding PHOENICS in POLIS (PHOENICS On-Line Information System). You can launch it by Starts in Windows--->Programs--->Phoenics 2007----> Polis Regards Richard |
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July 8, 2010, 05:10 |
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#12 |
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Mominul MuKuT
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Thanks for your every advices. I always read POLIS from http://www.cham.co.uk/phoenics/d_polis/polis.htm because PHOENICS is not installed directly in my PC, I use ASTEC-X to use Phoenics from my University server PC.
I have made a q1 file, 1. use EPOT (http://www.cham.co.uk/phoenics/d_pol...e.htm#epot)for electric potential and also use a simple boundary condition sin(XG)*Sin(1) for inlet and Sin(ZG)*Sin(1) for outer boundary. 2. Upper part of solution domain contains air with permittivity 1 and bottom part as a dielectric by using PATCH command and permittivity is 2.3 for kapton. The domain looks like as follows- To activate CVD, I followed the instruction as given here(http://www.cham.co.uk/phoenics/d_pol...oen/runcvd.htm) like: The CVD options are activated by setting NAMGRD=CVD; this line should therefore always be included. but running earth, shows error, from result file: Special GROUND CVD is in use Unable to access file SPECIDAT: please check that it is in the local directory why SPECIDAT is unable? I can't understand it.............. waiting for your reply according to |
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July 8, 2010, 05:37 |
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#13 |
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Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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Dear rechard!
I need to use this eqn. because it has to be set on upper electrode to calculate electric potential. how can i define? omega is 2*pi*f and f can be taken from period of time. but how is about t? I mean PATCH(EPOT, CELL, ..........................1, lstep) ??? Another question, how can I make such domain (comments#7) that means bottom electrode is inserted to dielectric material? Is it possible to make in phoenics or any other geometry generator is needed?? [previous time i didn't get strong support like you, may be I have already made you bored , sorry for that] |
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July 8, 2010, 22:15 |
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#14 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
Posts: 124
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DEAR Richard,
I have asked computer center of my university he said that Phoenices CVD is not available in my university |
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July 12, 2010, 00:08 |
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#15 | |
New Member
Richard
Join Date: Jul 2010
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Quote:
You can directly put the electrode objects in the domain and then set the object as the user defined and then use the patch name as elect and elect2 patch(elect2, cell, ..................,1, lstep) coval(elect2,epot,fixval,0) patch(elect, cell,..............,1,lstep) real(epmax,omig) epmax=... omig=... (source of epot at elect is epmax*sin(6.283184*omig*tim) with fixval) Rigards Richard |
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July 12, 2010, 00:47 |
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#16 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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Dear Richard,
Thanks and grateful to you for your every advice. Previous reply I made a mistake as I defined PATCH as EPOT it was a type mistake. I have tried with the following.. PATCH(UELEC,CELL,.............1,LSTEP) (SOURCE of EPOT at UELEC is 4*SIN(31415.9*TIM)) PATCH(BELEC,CELL,..........,1,LSTEP) (SOURCE of EPOT at BELEC is 0) for both electrode I have used INFORM, but when I use patch for bottom electrode which is inside of DIELECTRIC show ERROR in RESULT file: Unknown l0f argument now trying with your advises...let's see |
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July 12, 2010, 01:19 |
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#17 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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Dear Richard,
Now the error has gone. But EPOT gives the value of order E-04, hope it will be solved very soon. One thing, when I run virtual reality viewer the VECTOR button shows only the velocity vector if I click on C then EPOT to view the contour and click on VECTOR button to check the EPOT vector... contour is ok for EPOT but VECTOR shows for VELOCITY. how can I solve it? [IMG]file:///C:/DOCUME%7E1/mukut/LOCALS%7E1/Temp/moz-screenshot.png[/IMG] check this pic. same vector is showed for velocity but in also same for EPOT. The contour is for EPOT. |
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July 21, 2010, 22:29 |
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#18 | |
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Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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Quote:
Sorry I was busy with experiments and making a manuscript. I have tried the simulation with above mention statement. but EPOT didn't give any result at electrode :-( still trying. If you have any more suggestion, let me know plz :-( |
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July 27, 2010, 06:30 |
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#19 |
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Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
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Dear Richard, where are you? I have resolve some problem. Now problem is when I increase the NX then simulation result totally peculiar....
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July 27, 2010, 12:49 |
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#20 |
New Member
Richard
Join Date: Jul 2010
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Hello Mukut,
Could you please e-mail me the q1 file ? Also regarding the electrical potential, have you set the electrical conductivity ? Prndtl(epot)=.... Where do you set the permittivity ? I have to check this problem. Regards Richard |
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Tags |
body force, phoenics, plasma actuator, simulation |
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