Andrew Michael Soward FRS (born 20 October 1943) is a British fluid dynamicist.
He used asymptotic analysis to solve a number of outstanding problems in applied mathematics.
By a new pseudo-Lagrangian technique for studying lightly damped fluid systems, he elucidated previously inexplicable features of Braginskii's geodynamo.
He collaborated with Eric Priest to provide the first mathematically consistent account of the Petschek mechanism of magnetic field line reconnection.
Soward also gave the first complete solution of the Stefan (freezing) problem in cylindrical geometry; with C.A.