I'm trying to do a 2-D flow tran analysis of an airfoil close to the ground. The solution goes along fine, then the pressure starts to oscillate and it blows up. Any ideas as to what I can do to fix it? The boundary conditions are fixed velocities at all boundaries. Any ideas?

(1). Have you asked the vendor's support engineer why this is happening? (2). About 10 years ago, I have written a 2-D Navier-Stokes code to compute flow over a car above the ground. Both flow over and under the car(2-D) were computed. It converged in about 10 min. on a PC/486. (3). So, it is likely that the problem is between you and the code and the vendor. agree? (4). Ask the support engineer to show you how to do it right.