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 June 20, 2005, 22:28 The periodic condition can be #1 Member   Luckyluke Join Date: Mar 2009 Posts: 51 Rep Power: 10 The periodic condition can be defined as follows: sides { type cyclic; value uniform (0 0 0); } The entry term 'value' confused me. What is the exact meaning of this term?

 June 21, 2005, 04:31 The entry term 'value' gives t #2 Senior Member   Join Date: Mar 2009 Posts: 854 Rep Power: 15 The entry term 'value' gives the field value on the patch.

 June 21, 2005, 07:18 I use cyclic condition for 'Ga #3 Member   Luckyluke Join Date: Mar 2009 Posts: 51 Rep Power: 10 I use cyclic condition for 'Gamma' when I solve RT instability with interFoam. sides { type cyclic; value uniform 0; } Does the entry 'value' act as only an initial setting? After I run 'setGammaDamBreak', the value of Gamma of boundary 'sides' will be not zero,but determined by 'setGammaDamBreak'. Is it right?

 June 21, 2005, 08:09 Of course it's only the initia #4 Senior Member   Join Date: Mar 2009 Posts: 854 Rep Power: 15 Of course it's only the initial value, did you really think all boundary condition values are fixed to the value given?

 June 21, 2005, 09:08 That is ok. ^_^. With your gam #5 Member   Luckyluke Join Date: Mar 2009 Posts: 51 Rep Power: 10 That is ok. ^_^. With your gamma*(1-gamma) and gamma differencing scheme, I have got beautiful 3D RT instability interface structure. If I delete the gamma*(1-gamma) term and apply only the GD scheme, the sharp interface will be lost, right? I am not very clear with the effect on sharp interface intruduced by gamma*(1-gamma) term. How does it compress the interface? By the way, if I use wall condition on my 'sides' boundary, sides { type gammaContactAngle; theta0 90; thetaA 90; thetaR 90; uTheta 0.01; value uniform 0; } Then here how the 'value' entry affect the values on the patch? Will the gamma on the patch change when time goes?

 June 21, 2005, 09:41 Why not find out for yourself, #6 Senior Member   Join Date: Mar 2009 Posts: 854 Rep Power: 15 Why not find out for yourself, you will learn more that way and without consuming other peoples time.

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