What's the requirement of the derivative order of boundary conditions? -- CFD Online Discussion Forums

July 25, 2009, 01:47	What's the requirement of the derivative order of boundary conditions?	#1
hadesmajesty Member Edison Join Date: Mar 2009 Posts: 40 Rep Power: 17	What's the requirement of the derivative order of boundary conditions? If my governing equations contain 3 variables, vorticity,u and v, the derivatives order of which are: vorticity: 2nd/1st u: 1st v: 1st Can I use 2nd order boundary conditions like d^2(u)/d(x)^2=0 on the outflow boundary? Thank you in advance.

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