Masters Theses

Abstract

"Viscosity is an important physical property involving the transport of momentum in a fluid. Momentum is transferred within a fluid under an existing velocity gradient as the driving force. Since momentum transfer is actually attained by the dynamic interaction between particles of mass, a description of molecular interaction is essential in order to accurately predict the viscosity of a fluid. Temperature affects fluid viscosity by increasing the kinetic energy of the fluid system and thus the frequency by which molecules are involved in interaction. There have been many theoretical studies made concerning the intermolecular potential energy statements which serve as models for the molecules under consideration.

The problems that arise in describing the molecular interaction are many and varied. The geometry of the molecule, relative strength of the attractive and repulsive forces between molecules, and the angle of deflection must be considered in any realistic model used to describe the intermolecular forces. For non-polar gas studies, the Lennard-Jones potential gives a realistic and fairly accurate description of the potential energy of molecular interaction. A non-polar molecule can be defined as a molecule which does not exhibit a dipole moment in an unexcited state.

In order to accurately describe the behavior of a nonpolar gas or mixture of gases by the Lennard-Jones {6-12) potential, it is necessary that the two force constants or potential parameters be known. These force constants can be obtained from either viscosity or diffusional data. At this time there are very little experimental viscosity data available for non-polar gaseous mixtures over a wide temperature range. Viscosity data at various temperature levels are necessary in order to obtain accurate values of the potential parameters.

The purpose of this investigation was to obtain viscosity data for selected binary non-polar gaseous mixtures at three temperature levels. The gases used were binary mixtures of helium, air, argon, and carbon dioxide. Using the viscosities of these binary non-polar gaseous mixtures, the prediction of the viscosities of the actual binary mixtures from the force constants of the pure component gases could be investigated"--Introduction p. 1-2

Advisor(s)

Mailand R. Strunk

Committee Member(s)

Frank H. Conrad
Clifford D. Muir
James L. Kassner

Department(s)

Chemical and Biochemical Engineering

Degree Name

M.S. in Chemical Engineering

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1963

Pagination

viii, 154 pages

Note about bibliography

includes bibliographical references (pages 148-152)

Rights

© 1963 Gerald Lee Stevenson, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 1509

Print OCLC #

5953788

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