Cover: Convection and Diffusion in the Microcirculation

Convection and Diffusion in the Microcirculation

Published 1970

by Jerry Aroesty, Joseph Francis Gross

Purchase Print Copy

 Format Price
Add to Cart Paperback55 pages $15.00

A study using the ideas and analytical techniques of fluid mechanics to investigate the role of plasma motion in the transport of species between erythrocytes and surrounding tissue in rather narrow capillaries. It has been widely believed that the plasma circulatory motion in the region between the red blood cells and capillary wall is sufficiently vigorous to augment the low rates of species transport by diffusion alone. This study makes a detailed theoretical and numerical examination of the bolus model of capillary flow. It shows that for this highly idealized situation, the convective motions of the plasma and the enhanced mixing due to these motions do not appreciably augment diffusional species-transport rates for dissolved gases. The results of the equations of motion and the equations of species transport indicate that plasma mixing is important only in the transfer of materials such as macromolecules, which may diffuse more slowly than dissolved gases.

This report is part of the RAND research memorandum series. The Research Memorandum was a product of RAND from 1948 to 1973 that represented working papers meant to report current results of RAND research to appropriate audiences.

This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit

RAND is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.