University of Tennessee at Chattanooga
Place of Publication
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.
Chemistry and Physics Undergraduate research program (URP)
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.
Colloids; Brownian motion processes
Baier, Courtney, "Active colloid behavior exhibiting soft-sphere characteristics for non-Newtonian solvent" (2019). Honors Theses.