This book examines novel viewpoints about procedures and tools used in Hydrodynamics. The phenomena associated with the flow of fluids are usually complex, and tough to quantify. Novel approaches - considering points of view still not investigated - may present useful devices in the study of hydrodynamics and the associated transport phenomenon. The specifications of the flows and the characteristics of the fluids must be studied on a small scale. Subsequently, novel concepts and devices are devised to better explain the fluids and their characteristics. This book provides conclusions about advanced issues of calculated and observed flows. Major topics in this book are radiation, electro-magneto-hydrodynamics and magneto-rheology; special points on simulations and experimental inputs are also discussed.