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CalcCostFunctionhEquation.m
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CalcCostFunctionhEquation.m
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function [r,UserVar,RunInfo,rForce,rWork,D2]=CalcCostFunctionhEquation(UserVar,RunInfo,CtrlVar,MUA,gamma,F1,F0,L,Lrhs,l,dh,dl)
narginchk(12,12)
nargoutchk(1,6)
F1.h=F1.h+gamma*dh;
l=l+gamma*dl;
% Make sure to update all other fields that depend on h
% Here the only such field is potentially the mass balance term
CtrlVar.ResetThicknessToMinThickness=0;
[F1.b,F1.s]=Calc_bs_From_hBS(CtrlVar,MUA,F1.h,F1.S,F1.B,F1.rho,F1.rhow);
[UserVar,F1]=GetMassBalance(UserVar,CtrlVar,MUA,F1); % actually this call only needed if mass-balance depends on h
% Only here evaluating the righ-hand side of the equation, is the J(x0+ gamma dx)
[UserVar,R]=MassContinuityEquationAssembly(UserVar,RunInfo,CtrlVar,MUA,F0,F1) ;
if ~isempty(L)
frhs=-R-L'*l;
grhs=Lrhs-L*F1.h;
else
frhs=-R;
grhs=[];
end
frhs=frhs/MUA.Area; % It's OK to do this only here, because I scale frhs and grhs equally.
grhs=grhs/MUA.Area;
D2=[frhs;grhs]'*[dh;dl];
rWork=full(D2^2);
rForce=full([frhs;grhs]'*[frhs;grhs]);
switch CtrlVar.hMinimisationQuantity
case "Force Residuals"
r=rForce;
case "Work Residuals"
r=rWork;
end
end