A large number of physical phenomena are modeled by nonlinear partial
 differential equations, subject to appropriate initial/ boundary conditions; these
 equations, in general, do not admit exact solution. The present monograph gives
 constructive mathematical techniques which bring out large time behavior of
 solutions of these model equations. These approaches, in conjunction with modern
 computational methods, help solve physical problems in a satisfactory manner. The
 asymptotic methods dealt with here include self-similarity, balancing argument,
 and matched asymptotic expansions. The physical models discussed in some detail
 here relate to porous media equation, heat equation with absorption, generalized
 Fisher's equation, Burgers equation and its generalizations. A chapter each is
 devoted to nonlinear diffusion and fluid mechanics. The present book will be found
 useful by applied mathematicians, physicists, engineers and biologists, and would
 considerably help understand diverse natural phenomena.
A large number of physical phenomena are modeled by nonlinear partial differential equations, subject to appropriate initial/ boundary conditions; these equations, in general, do not admit exact solution. The present monograph gives constructive mathematical techniques which bring out large time behavior of solutions of these model equations. These approaches, in conjunction with modern computational methods, help solve physical problems in a satisfactory manner.
 The asymptotic methods dealt with here include self-similarity, balancing argument, and matched asymptotic expansions. The physical models discussed in some detail here relate to porous media equation, heat equation with absorption, generalized Fisher's equation, Burgers equation and its generalizations.
 A chapter each is devoted to nonlinear diffusion and fluid mechanics. The present book will be found useful by applied mathematicians, physicists, engineers and biologists, and would considerably help understand diverse natural phenomena.