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Showing results 1 to 25 of 31 Search took 0.00 seconds. Search: Posts Made By: gbrajtm

Forum: CFX November 4, 2019, 01:37

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Mesh size dependent on the geometry of the model.... Mesh size dependent on the geometry of the model. I have used the mesh sensitivity check method to choose the mesh size. Also, try to reduce the time step size.

Forum: CFX January 8, 2016, 01:08

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm http://www.cfd-online.com/Forums/cfx/165034-cel-if... http://www.cfd-online.com/Forums/cfx/165034-cel-if-condition.html#post580052

Forum: CFX January 8, 2016, 01:05

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm ok sir, ... ok sir, http://www.cfd-online.com/Forums/newthread.php?do=newthread&f=4

Forum: CFX January 7, 2016, 05:23

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm 44364Dear sir, As in attached, I have used... 44364Dear sir, As in attached, I have used solid body as the rigid body. Here i need to specify the two region in an if condition to distinguish Newtonian and Non Newtonian. Since there are two...

Forum: CFX July 13, 2015, 09:45

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm i am sorry sir, I didn't understand, "piston... i am sorry sir, I didn't understand, "piston location is an algebraic function of the fluid pressure"

Forum: CFX July 13, 2015, 08:01

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm yes, but the pressure acting on the accumulator... yes, but the pressure acting on the accumulator opposite to piston, how can that be specified?

Forum: CFX July 13, 2015, 01:50

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Sorry, its not diaphragm, its accumulator with... Sorry, its not diaphragm, its accumulator with certain pressure. please find the image.

Forum: CFX July 10, 2015, 08:29

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Hello sir, i wanted to give a boundary... Hello sir, i wanted to give a boundary condition for bottom of the piston, which is diaphragm with certain elastic constants. Presently i have given wall boundary condition. I searched for elastic...

Forum: CFX July 4, 2015, 02:30

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Hello sir, Greetings, Hope your are doing... Hello sir, Greetings, Hope your are doing great. After trying many iteration to resolve negative element implementing CEL, now i am getting some results (force vs displacement) need to verify...

Forum: CFX May 22, 2015, 09:30

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Hi sir, I considered 3D region, But i am... Hi sir, I considered 3D region, But i am getting an negative volume element. I tried by changing the mesh size, but i am not able to get rid of the error(attached). Can you please suggest some...

Forum: CFX May 6, 2015, 04:00

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Hi Glenn Horrocks, This equations works fine,... Hi Glenn Horrocks, This equations works fine, even i am getting some results. Then i noticed that the @piston is 2D location as shown in the fig. But i am not sure whether " Inside" function take...

Forum: CFX April 23, 2015, 06:13

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm thanks, now I got it, so results are as not... thanks, now I got it, so results are as not expected. Closetopiston expression used also not service the goal. is there any other method? where i can write expression depending on time in the...

Forum: CFX April 23, 2015, 02:16

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Yes , I know the expressions, But didn't know how... Yes , I know the expressions, But didn't know how to make it compatible with ANSYS CEL. My intention is the thin region should behave like Non newtonian as per the expression given, but rest...

Forum: CFX April 20, 2015, 07:09

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm If want to consider the piston location along... If want to consider the piston location along with other two co-ordinate, what changes i have to make to this expression. CloseToPiston = if(abs(x-PistonX)<Tolerance,1,0)

Forum: CFX April 11, 2015, 04:39

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Hi, Glenn Horrocks, The expression below are... Hi, Glenn Horrocks, The expression below are used in the simulation. St = 10000*tanh(Shear Strain Rate/0.001[s^-1]) pistonx = 0.0425[m]*cos(1.33*t/1 [s]) Vel = 0.06[m/s]*sin(1.33*t/1 [s])...

Forum: CFX April 1, 2015, 07:46

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Thank you very much i will simulate and let you. ... Thank you very much i will simulate and let you. Thanks

Forum: CFX April 1, 2015, 02:30

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Sorry for troubling you. I didn't get how to add.... Sorry for troubling you. I didn't get how to add. My displacement expression for Piston motion in X direction is: 0.0425[m]*sin(t/1 [s]) And dynamic viscosity is if(Shear Strain Rate >=...

Forum: CFX March 31, 2015, 07:14

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm yes, the value provided are not realistic. The... yes, the value provided are not realistic. The values are different, for just your ference i have added. How to add the piston motion equation as the input to the Viscosity expression.

Forum: CFX March 31, 2015, 05:50

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Hi Glenn Horrocks, Greetings,Hope you doing... Hi Glenn Horrocks, Greetings,Hope you doing well. I have added viscosity model as function of magnetic flux density using CEL, But i have not considered the piston location while calculating...

Forum: CFX March 19, 2015, 06:29

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm I can mail you my simulation if you provide the... I can mail you my simulation if you provide the email id. I am trying simulate a magneto rheological fluid damper to study the performance by obtaining Force developed in the damper. The small...

Forum: CFX March 19, 2015, 06:12

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Yes its little complex, I have obtained the yield... Yes its little complex, I have obtained the yield stress value from the magnetic flux density. Is the way i am doing is correct? may i know what you think.?

Forum: CFX March 19, 2015, 05:57

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm In same computational domain i have two types of... In same computational domain i have two types of fluid properties. In annular gap its not newtonian fluid due to viscosity and in rest other region it is newtonian. so viscosity is defined in terms...

Forum: CFX March 18, 2015, 23:34

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Hi Glenn, I got the expression where the... Hi Glenn, I got the expression where the Bingham model is defined in terms of shear rate. How can i incorporate it into fix? Equations are μ= τ_y/γ + μp γ ≥ 15 μ = μs γ <...

Forum: CFX February 23, 2015, 07:08

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Hi Glenn Horrocks, Hope you doing well. ... Hi Glenn Horrocks, Hope you doing well. I need one more help, my problem statement is below. I have magnetorheological damper, Where the area near to the piston (piston has holes to pass...

Forum: CFX January 20, 2015, 04:30

Replies: 58 CEL Code for Sinusoidal Movement of Piston Views: 6,360 Posted By gbrajtm Thank you very much for your time. Kind... Thank you very much for your time. Kind Regards Guru

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