Title

Dynamic Simulation of Entangled Polymers undergoing Deformation

Presenter Information

Tong Mou

Department

Chemical and Biochemical Engineering

Major

Chemical Engineering

Research Advisor

Park, Joontaek

Advisor's Department

Chemical and Biochemical Engineering

Abstract

Polymeric liquids possess complex properties that significantly deviate from Newtonian fluids. Therefore, understanding such abnormal flow behaviors is important in industrial applications. This study implements the stochastic-tube model to dynamically simulate polymer chains. These were placed under a constant shear rate for a certain amount of time and analyzed to ascertain whether the polymer chains undergo a “tumbling” motion and determine how the extent of linearity changes with time for different shear rates. The tumbling is also quantified in terms of a newly introduced variable. The simulation results indicate that the polymer chains exhibit a significant tendency to elongate at higher shear rates and occasionally experience tumbling, while lower shear rates tend to exhibit very infrequent tumbling and slight elongation. These results may help explain the inverse sigmoidal behavior of polymer viscosity vs. shear rate. Comparison of dynamic behaviors under shear and extension is also made.

Biography

Tong Mou is a senior undergraduate student of Chemical Engineering at the Missouri University of Science and Technology. Tong has worked with Dr. Joontaek Park on the polymer deformation simulation project from January 2015 to April 2015. Her contribution is using the developed code to visualize the simulation data under different shear rates from the new model.

Research Category

Engineering

Presentation Type

Oral Presentation

Document Type

Presentation

Award

Engineering oral presentation, Second place

Location

St. Pat's B

Presentation Date

15 Apr 2015, 2:30 pm - 3:00 pm

Comments

Joint project with Cody Spratt

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Apr 15th, 2:30 PM Apr 15th, 3:00 PM

Dynamic Simulation of Entangled Polymers undergoing Deformation

St. Pat's B

Polymeric liquids possess complex properties that significantly deviate from Newtonian fluids. Therefore, understanding such abnormal flow behaviors is important in industrial applications. This study implements the stochastic-tube model to dynamically simulate polymer chains. These were placed under a constant shear rate for a certain amount of time and analyzed to ascertain whether the polymer chains undergo a “tumbling” motion and determine how the extent of linearity changes with time for different shear rates. The tumbling is also quantified in terms of a newly introduced variable. The simulation results indicate that the polymer chains exhibit a significant tendency to elongate at higher shear rates and occasionally experience tumbling, while lower shear rates tend to exhibit very infrequent tumbling and slight elongation. These results may help explain the inverse sigmoidal behavior of polymer viscosity vs. shear rate. Comparison of dynamic behaviors under shear and extension is also made.