Some Flow Problems In Peristalsis on Dispersion Effects Of Wall Properties

Abstract

Bio-fluid mechanics is part of biomechanics which describes the kinematics newlineand dynamics of body fluids in humans, animals and plants. It uses the general newlineprinciples of fluid mechanics which involve some new applications to biologi- newlinecal systems. Modern bio-fluid mechanics measures and analyzes the fluid flow newlinein the blood vessels, the respiratory system, the lymphatic system, the gastroin- newlinetestinal system, the urinary system and many other physiological situations. newlineStudies in this area are important for clinical applications such as artificial newlineorgans, vascular vessel development, and design of medical tools and fabri- newlinecation of materials membranes for orthopedics. The interaction of peristalsis newlinewith dispersion studies in this thesis since they are very important phenomena newlinein biological, chemical, environmental and bio-medical processes. We briefly newlinedescribe below the concepts of peristalsis and dispersion so that the problems newlinestudied in this thesis can be properly understood. newlinePeristalsis is a form of material transport induced by a progressive wave of newlinearea contraction or expansion travelling along the length of a distensible tube newlineor channel containing the fluid. Physiologically, peristaltic action is an inher- newlineent property of smooth muscle contraction. Peristalsis is an automatic and vital newlineprocess that drives the urine from the kidney to the bladder through the ureter, newlinefood through the digestive tract, bile from the gall bladder into the duodenum, newlinethe movement of spermatozoa in the ducts efferents of the male reproductive newlinetract, movement of the ovum in the Fallopian tube, vasomotion in small blood newlinevessels and many others. Peristaltic flows play an indispensable role in some newlinebiomedical instruments such as heart-lung machine. A major industrial ap- newlineplication of this mechanism is in the design of the finger and roller pumps, newlinewhich are used in pumping fluids without being contaminated due to the con- newlinetact with the pumping machinery. This mechanism is also used for transport of newline newlinesensitive or corrosive fluids, sanitary