Figure 7.17:

Effectiveness factor versus Thiele modulus for different values of the Biot number; first-order reaction in a spherical pellet.

Code for Figure 7.17

Text of the GNU GPL.

main.m

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% Copyright (C) 2001, James B. Rawlings and John G. Ekerdt
%
% This program is free software; you can redistribute it and/or
% modify it under the terms of the GNU General Public License as
% published by the Free Software Foundation; either version 2, or (at
% your option) any later version.
%
% This program is distributed in the hope that it will be useful, but
% WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
% General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; see the file COPYING.  If not, write to
% the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
% MA 02111-1307, USA.

Binv = [0 0.5 2 10]; % B = [Inf 2 .5 .1]
nphi = 100;
phi = [logspace(-2,2,nphi)]';
tmp = phi;
%
% vary 1/B
%

for k=1:length(Binv)
    eta = 1./phi.*(1./tanh(3*phi) - 1./(3*phi))./ ...
            ( 1 + Binv(k)*(phi./tanh(3*phi) - 1/3) );
    tmp = [tmp eta];
end

save -ascii bioteta.dat tmp;

if (~ strcmp (getenv ('OMIT_PLOTS'), 'true')) % PLOTTING
    loglog (tmp(:,1), tmp(:,2:5));
    % TITLE
end % PLOTTING