Stability Problems in Walters B' Viscoelastic Fluid, About the book: This book is mainly concerned with mathematical analysis of Walters B' viscoelastic fluid. Salient Features: 1. Chapter-1 is introductory in nature that reviews the essential, existing literature in the field of viscoelastic fluid. Chapter-2 presents the results for the thermal instability of viscoelastic fluid heated from below in the presence of rotation and magnetic field. Chapter-3 extends the consideration of Chapter-2 for porous medium. Chapter-4 investigates the stability of superposed viscoelastic fluids and derives the results for Rayleigh-Taylor instability problem. Chapter-5 extends the results of Chapter-4 for porous medium. Chapter-6 concern with Kelvin-Helmholtz instability and extends the results of Chapter-5. Chapter-7 mathematically derive the criteria for stability in the problem of immiscible, viscoelastic liquid-liquid displacements in porous medium.