Project Director

Sanchez-Diaz, Luis

Department Examiner

Hamblen, Joshua

Department

Dept. of Chemistry

Publisher

University of Tennessee at Chattanooga

Place of Publication

Chattanooga (Tenn.)

Abstract

The purpose of analyzing soft-sphere Brownian particles with varying velocities and densities is to be able to predict their interaction behavior once a force has been applied. The particles portray different behaviors depending on if the particles are passive or active Brownian particles. The data studied was collected from simulations, and there are no attractive forces involved in the particles’ interactions. Mean square displacement graphs, radial distribution graphs, structure factor graphs, and viscosity as a function of density and velocity were used to examine and compare the data generated. Experimental data was analyzed by a program to be interpreted into a mean square displacement graph. It has been determined that once particles form into clusters, the clusters do not remain static, but they interact as a dynamic system. For the analysis of viscosity, it has been determined that an increase in density always results in shear thickening. However, an increase in velocity creates an overall shear thickening trend, but an increased velocity of the particles results in clusters splitting into two small clusters leading to a shear thinning effect. These results allow for a better understanding of Brownian particle behavior given different environmental factors such as magnitude of force.

Acknowledgments

Chemistry and Physics Undergraduate research program (URP)

Degree

B. S.; An honors thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Bachelor of Science.

Date

5-2019

Subject

Colloids; Brownian motion processes

Keyword

Brownian motion; Active colloids; Passive colloids; Viscosity; Pressure; Non-Newtonian fluid

Discipline

Chemistry

Document Type

Theses

Extent

39 leaves

DCMI Type

Text

Language

English

Rights

http://rightsstatements.org/vocab/InC/1.0/

License

http://creativecommons.org/licenses/by/4.0/

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Chemistry Commons

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