چکیده (انگلیسی):

The paper concerns the development of a mathematical model for the study of the influence of whole-body accelerations (vibrations) on the flow of blood in single arteries. Human and subhuman prinates are often exposed to vibration environments in various ways. When a subject is placed on a vibration table, whole-body vibration is instantaneously induced in the body. In addition, while riding in vehicles or while flying in aircraft or spacecraft, man is often subjected to unintentional body accelerations. Vibration physiology is thus of great concern in the field of space and military aircraft. In order to study the fully developed flow-field in a specimen of artery, a suitable mathematical model is developed here by employing the momentum integral method. The effect of microrotation of the blood cells on the flow-field has been duly accounted for. The validity of the analysis is illustrated through the presentation of computational results for the mass flow magnitude when a specific arterial segment is exposed to a sinusoidal pressure gradient and wall vibration acting in phase/opposition. For mass flow stoppage, critical values of the phase angle by which the sinusoidal wall vibration leads the sinusoidal pressure pulse, in the case when the angular frequency of the wall vibration is equal to that of the pressure pulse, and a nondimensional parameter representing the ratio of the peak wall velocity to the Poiseuille
centreline relative velocity for the peak pressure gradient, are also investigated.