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In order to understand the nature of colloidal fluids, we wanted to visualize a 3D representation of their thermodynamic distribution. Colloidal fluids are fluids that consist of two parts: colloidal particles and a dispensing medium. Some examples include toothpaste, mayonnaise, plaster, and muddy water. We could also think about colloidal fluids simply as a mixture of two or more parts. In this poster, we used the hard-sphere system to represent the structure of colloidal fluids in a 3D graph using Mathematica (MMA). In the hard-sphere system, we used two different sizes of impenetrable spheres that could not overlap to represent particles in a binary colloidal fluid. We focused on how their interactions caused probable arrangements. We located big and small particles in the hard-sphere system by finding their pressure distribution, where the pressure distribution was found by calculating the forces created by the particle collisions. The results of our 3D graph representation of the particle distribution of a binary colloidal fluid showed that the particles’ interactions with each other caused ray and sheet-like structures. Understanding this particle distribution and structure of a colloidal fluid can help us in several applications. For example, we could apply this knowledge when dealing with separation processes of binary mixtures, which are similar to colloidal fluids. In addition, understanding the thermodynamic distribution of colloidal fluids could help in understanding buoyancy seen in colloidal mixtures, which has been seen to break Archimede’s principle.
Three-dimensional imaging; Colloids; Fluids
Condensed Matter Physics
Livermore, Kate and Korth, Michael, "3D Imaging of a Binary Colloidal Fluid" (2019). Undergraduate Research Symposium 2019. 8.