Nonuniqueness of FCPOT Numerical Solution
After the Workshop Steinhoff and Jameson devised an example to test whether Jameson’s FCPOT method could in fact produce a nonunique solution. Jameson informs us that when he applies his method to an airfoil with a cusped trailing edge (They claim a similar result can be obtained on the NACA 0012 airfoil also) AND inforces symmetry on his trailing edge condition he obtains the symmetric solution displayed in Fig. 1. But if he applies his method as if it were an asymmetric problem, i.e., allows his usual trailing edge procedure to operate, he obtains not the expected symmetric solution, but the one shown in Fig. 2. In both cases the log of the residues is under -11, evidently both are bona fide solutions to the difference equations.
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