This presentation is the property of its rightful owner.
1 / 16

# Modeling the Internal Flow of a Droplet PowerPoint PPT Presentation

Modeling the Internal Flow of a Droplet. Craig Ferguson. Table of Contents. Problem Definition Applications Physical Background Program Design Algorithm Used User Interface Current Progress Future Work. Electrowetting. [1]. Electrowetting Applications. [2] [3].

Modeling the Internal Flow of a Droplet

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

## Modeling the Internal Flow of a Droplet

Craig Ferguson

• Problem Definition

• Applications

• Physical Background

• Program Design

• Algorithm Used

• User Interface

• Current Progress

• Future Work

[1]

[2] [3]

### Problem Definition

Model the flow inside a droplet moving between two infinite plates

Actual Situation (Droplet)

Current Model (Pipe Flow)

### Physical Background

• Navier Stokes Equations [4]

• Computational Fluid Dynamics

### Program Design

Inputs – Wall Velocities, Droplet Shape, Viscosity, Density, Droplet Size

Algorithm – Variation on SIMPLE

Outputs – Graphical Representations of Fluid Flows and Pressures: Vector Plots, Topographical Plots

### Considered Algorithm

SIMPLE – Semi-Implicit Method for Pressure-Linked Equations

• Guess P

• Calculate (u, v) for surrounding nodes

• Correct the guessed pressures and velocities

• Repeat until convergence

### Future Work

• Finish coordinate transformations

• Set up boundary conditions for desired problem

• Obtain results

• Test results against laboratory data, to be gathered

• Modify program to be more general or more efficient

### References

[1] Duke University. (June 2004). “Digital Microfluidics by Electrowetting, Duke University.” http://www.ee.duke.edu/research/microfluidics/.