Floating point error

August 7, 2007, 03:33

i am simulating a supersonic flow (1.71 mach, laminar) in 2-D cavity. I used couple-implicit scheme.When i am using 1st order upwind, the vortices are not being captured int eh cavity nor the shocks. but when i go for 2nd order upwind, after some 5000 itterations, the message " temperature and pressure limited to ....." and then "divergence detected-temporarily reducing the CFL no..." and finally showing the error "Floating point error". Can sombody help me please....

August 7, 2007, 06:47

Look at the external flow supersonic tutorial.

August 7, 2007, 03:33	Floating point error	#1
Ravi Guest Posts: n/a	i am simulating a supersonic flow (1.71 mach, laminar) in 2-D cavity. I used couple-implicit scheme.When i am using 1st order upwind, the vortices are not being captured int eh cavity nor the shocks. but when i go for 2nd order upwind, after some 5000 itterations, the message " temperature and pressure limited to ....." and then "divergence detected-temporarily reducing the CFL no..." and finally showing the error "Floating point error". Can sombody help me please....

August 7, 2007, 06:47	Re: Floating point error	#2
Joe Guest Posts: n/a	Look at the external flow supersonic tutorial.

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