# Presentation: 805471

##                            
                            Timothy Salter 
                  Alabama A&M University 
           Research Alliance For Minorities
               Mentor: Srdan Simunovic
                http://www.csm.ornl.gov

**                            ****Timothy Salter **
**                  ****Alabama A&M University **
**           ****Research Alliance For Minorities**
**               ****Mentor: Srdan Simunovic**
**                ****http://www.csm.ornl.gov**

-    **Modeling of Fiber Networks**

-        This work has been authored by a contractor of the U.S. Government under
-         contract DE-AC05-00OR22725. Accordingly, the U.S. Government retains a
-         nonexclusive, royalty-free license to publish or reproduce the published
-         form of this contribution, or allow others to do so, for U.S. Government
-         purposes.

-        This research was performed under the Research Alliance for Minorities
-         Program administered through the Computer Science and Mathematics Division,
-         Oak Ridge National Laboratory. This Program is sponsored by the
-         Mathematical, Information, and Computational Sciences Division; Office of
-         Advanced Scientific Computing Research; U.S. Department of Energy. Oak
-         Ridge National Laboratory is managed by UT-Battelle, LLC, for the U.S.
-         Department of Energy under contract DE-AC05-00OR22725

##            Background

**Previous research has shown that interesting deposits form during the preparation of laboratory-made paper**
** ****Such paper is manufactured from a suspension, out of which fibers filtrate onto a wire mesh, leaving behind a disordered fiber network**

##       Background Cont’d

**The deposits discussed in this project are know as flocculation and dispersion**
**Flocculation occurs when the fibers stick or clump together**
**Dispersion occurs when the fibers repel one another**

##                  Goal

**To develop a method that will model the flocculation and dispersion of the fiber networks in both 2 and 3 dimensions**

##            Mathematica

**Is a software package for technical computing, that was used to develop a program that would generated models for flocculated and dispersed fibers**

##  Capsicum – SGI Origin 2000

** ****Capsicum – SGI Origin 2000**

##             Parameters

**Lx=10;   domain x size**
**Ly=10;   domain y size**
**Lf=1;       fiber length**
**Lh=Lf/2; fiber  half**
**Accpt=0.10;  acceptance probability**
**NFiberAccept=1./Accpt; acceptance probability counter threshold **

##       Parameters Cont’d

**NFiber=2000; number of fibers that we want to have in the domain **
**NFiberMax=100000; maximum number of fibers to TRY to deposit into the domain **
**NFiberLast=200;    the last fibers in set to check against **

##                Results

**2-D Flocculation Model**

## 2-D Flocculation Model

**2-D Flocculation Model**

## 2-D Dispersion Model

**2-D Dispersion Model**

## 2-D Dispersion Model

**2-D Dispersion Model**

## 3-D Flocculation Model

**3-D Flocculation Model**

## 3-D Dispersion Model

**3-D Dispersion Model**

## Summary

**These models will be used to analyze the density in fiber networks and micro-structural properties of fiber-based materials.**