Fast Finite-Difference Solution of Biharmonic Problems Setting the Reynolds number equal to zero, in a method for solving the Navier-Strokes equations numerically, results in a fast numerical method for biharmonic problems. The equation is treated as a system of two second order equations and a simple smoothing process is essential for convergence. An application is made to a crack-type problem. CACM May, 1972 Greenspan, D. Schultz, D. numerical analysis, partial differential equations, biharmonic equation, boundary value problem 5.17 CA720507 JB January 31, 1978 9:43 AM 2352 4 2353 2353 4 2353 2094 5 2353 2353 5 2353 2353 5 2353 2353 5 2353