### Matlab

- Here I'll collect some of the scripts I wrote during the past years to make life easier.

#matlab -->Some Scilab scripts and functions I transformed to Matlab code to include them in other Matlab codes. The differences are minimal, but still there are some differences.

### Single Collector Efficiency

- Matlab script version of the scilab code to calculate the single collector efficiency as defined by Tufenkji and Elimelech [2004]: etafct.m

function [eta0]=etafct(k,A,dp,dc,v,T,mu,rhop,rhof,g,n) ap=dp/2; %radius of the particle (m) NR=dp/dc; %Aspect Ratio Dinf=(k*T)/(6*pi*mu*ap); %Diffusion coefficient in an infinite medium NPe=(v*dc)/(Dinf); %Peclet NUmber, characterizing ratio of convective %transport to diffusive transport NvdW=A/(k*T); %Van der Waals number, charcterizing ratio of vdW %interaction energy to the particle's thermal energy NA=A/(12*pi*mu*(ap^2)*v); %Attraction number, represents combined %influence of vdW attraction forces and fluid velocity on particle %deposition rate due to interception NG=(2/9)*(((ap^2)*(rhop-rhof)*g)/(mu*v)); %Gravity number, ratio of %Stokes particle settling velocity to approach velocity of the fluid Y=(1-n)^(1/3); %Y-part of porosity-dependent parameter of Happel's model AS=(2*(1-Y^5))/(2-3*Y+3*Y^5-2*Y^6); %porosity-dependent parameter of %Happel's model eta0=(2.4*AS^(1/3)*NR^(-0.081)*NPe^(-0.715)*NvdW^(0.052))+(0.55*AS*NR^(1.675) *NA^(0.125))+(0.22*NR^(-0.24)*NG^(1.11)*NvdW^(0.053)); %long equation, glue the second line to the one above...Call the function by using:

eta(j)=etafct(k,A,dp,dc,v(j),T,mu,rhop,rhof,g,n);where: k=Bolzmann Constant, A=Hamaker Constant, dp=Particle diameter, dc=Collector diameter, v(j)=seepage velocity, T=Absolute Temperature, mu=Viscosity, rhop=Particle Density, rhof=Fluid Density, g=Gravitational Acceleration, n=porosity.

### Run multiple scripts from one

- Matlab script I wrote to run scripts from multiple subdirectories