Problem in generating linear Wave !?
I am trying to generate linear Wave in CFX,..
I all so make following conditions:
@Inlet : i applied velocity at Ui and Vi ; and Fluid Values: water= WaterI
@Outlet: Relative Pressuer is Hypers, Fluid value is Zero gradient
WaterI = if(y<WaterSurface, 1, 0)
Hypres= if(y >WaterSurface, 0[Pa], (997-1.185)*g*(WaterSurface-y))
WaterSurface = 0,5*H*Cos(2*pi*(x/L-t/T))
Ui = pi*H /T *cosh(2*pi*(y+d)/L )*cos(2*pi*(x/L -t/T))/cosh(2*pi*d/L )
Vi = pi*H /T *sinh(2*pi*(y+d )/L )*sin(2*pi*(x/L -t/T))/sinh(2*pi*d /L )
H: wave height
L: wave length
T wave period
d: mean water depth
But, my result is non-reasonable,... Pls ponit me what is wrong ?
thank and sorry for my English
If you want us to help you, you will have to describe what happened. What is not reasonable about it?
Followings describes my problem, The result is nonreasonable and i dont understand it
pls let me know what is wrong here !
Many thank and Brg
First seems like you didnt initialise the model. For 2-Phase transient flow it is necessary to define the area of water before the simulation. I did this 2D numerical wave channel thing in Fluent a couple of years ago, so the main problem is not to generate the waves, it is to get the waves out of the model. Fluent supported this with sth called numerical beach treatment, maybe you have similar functions in CFX. No ideas if your formulas are right but you have to differentiate between shallow and deep water waves, which you will find with the right formulars in every good book about free surface/open channel flow
Imagine define my model, CFD-Online.ccl define boundary condition i made... pls see and correct it
Thank so much !
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