inviscid transonic RAE2822 - unable to get a converged solution

ksklemmer · July 27, 2015, 14:52

I'm trying to run a simulation for an RAE2822 airfoil with M=0.729, Re=6.5E6, and angle of attack at 2.31 deg. I want to run an inviscid simulation in STAR-CCM+, but it I just use the default in the physics I am using (steady, 2D, ideal gas, coupled energy, coupled flow, inviscid) I don't get a converged solution. Has anyone had a similar problem or know how I might fix this? If I use a 1st order method then I get a solution that is more stable, but my lift coefficient is too low.

Thanks!

fluid23 · July 28, 2015, 12:19

can you post a plot of your residuals, mesh and velocity distribution near the airfoil?

fluid23 · July 28, 2015, 12:20

sorry, that wasn't very clear... residual plot and mesh/velocity near airfoil.

July 27, 2015, 14:52	inviscid transonic RAE2822 - unable to get a converged solution	#1
ksklemmer New Member Kerry Klemmer Join Date: Jun 2015 Posts: 1 Rep Power: 0	I'm trying to run a simulation for an RAE2822 airfoil with M=0.729, Re=6.5E6, and angle of attack at 2.31 deg. I want to run an inviscid simulation in STAR-CCM+, but it I just use the default in the physics I am using (steady, 2D, ideal gas, coupled energy, coupled flow, inviscid) I don't get a converged solution. Has anyone had a similar problem or know how I might fix this? If I use a 1st order method then I get a solution that is more stable, but my lift coefficient is too low. Thanks!

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July 28, 2015, 12:19		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 19	can you post a plot of your residuals, mesh and velocity distribution near the airfoil?

July 28, 2015, 12:20		#3
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 19	sorry, that wasn't very clear... residual plot and mesh/velocity near airfoil.