In this research the two dimensional grain burn-back, based on improved level set method is studied. In the first step, the distance function is evaluated according to creation of an unstructured grid in the inner surface and Cartesian structured grid in the outer surface of the grain. Then, with derivation of final form of the level set equations, the solid propellant burning area and port are...

heuristics are often used to provide solutions for flow shop scheduling problems.the performance of a heuristic is usually judged by comparing solutions and run times on test cases.this investigation proposes an analytical alternative ,called asymptotic convergence ,which tests the convergence of the heuristic to a lower bound as problem size grows. the test is a stronger variation of worst cas...