This book is about magnetohydrodynamics, explaining how magnetic fields can induce currents within a moving conductive fluid, which in turn creates forces on the fluid and influences the magnetic field itself. The book explains its governing equations and discusses free, forced and mixed convection heat transfers of nanofluids. The models discussed in the book have applications in various fields, including mathematics, physics, biology, medicine, engineering, nanotechnology, and materials science. This book will be of use to professionals, researchers, scientists, policy makers, and students with a keen interest within this field. This book provides an understanding of the fundamentals of new numerical and analytical methods, acting as a remedy for the lack of convenient and integrated sources of information in this specific field of study.