# Is there any way to speed up the PDE solver with the parallel computing toolbox?

조회 수: 8(최근 30일)
Steven 2018년 9월 25일
편집: Steven 2018년 9월 26일
Can I speed up this code by paralleling it with the parallel computing toolbox?
thermalmodel = createpde('thermal','transient');
gm = multicuboid(1,1,0.5,'ZOffset',0.5);%if this doesn't work choose your own geometry
thermalmodel.Geometry = gm;
%%%%%%%%%%%%%%%%%%%%%%%GENERATE MESH %%%%%%%%%%%%%%%
% meshsize = 0.4;%mm
meshsize = 4;%mm
generateMesh(thermalmodel,'Hmax',meshsize/1000);
thermalmodel.Mesh
pdemesh(thermalmodel)
htc = vpa(25) *u.Watt/(u.m^2*u.Kelvin);
htc = rewrite(htc,u.Watt/(u.in^2*u.Kelvin));
htc = double(separateUnits(htc));
thermalBC(thermalmodel,'Face',1:thermalmodel.Geometry.NumFaces,'ConvectionCoefficient',htc,'AmbientTemperature',288.15);
thermalBC(thermalmodel,'Face',1,'Temperature',50+273);%bottom face
mybc = @(region,state) sin(350*state.time).^2;
thermalBC(thermalmodel,'Face',12,'Temperature',mybc);%top face
tfinal = 6;
tlist = 0:3:tfinal;
thermalIC(thermalmodel,0);
thermalmodel.SolverOptions.ReportStatistics = 'on';
result = solve(thermalmodel,tlist);
figure; pdeplot3D(thermalmodel)
pdeplot3D(thermalmodel,'XYData',T(:,end),'Contour','on','ColorMapData',results.Temperature);
title('Temperature in K')
colorbar
pdeplot3D(thermalmodel,'ColorMapData',results.Temperature);
axis equal
title(sprintf('Transient Temperature at Final Time (%g seconds)',tfinal));

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### 채택된 답변

Alan Weiss 2018년 9월 26일
Sorry, currently Partial Differential Equation Toolbox™ does not use parallel computing.
Alan Weiss
MATLAB mathematical toolbox documentation

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### 추가 답변(1개)

Ravi Kumar 2018년 9월 26일
Your mesh density is too high. I could not get the mesh generated on my machine in a reasonable time. This means, there are large number of DoFs. Can you run your problem first with the default mesh, by using:
generateMesh(thermalmodel);
generateMesh(thermalmodel,'Hmax',meshsize/1000);
I am sure you will be able to solve this on a single machine. Then see how much mesh resolution you really need.
Regards, Ravi
##### 댓글 수: 1표시숨기기 없음
Steven 2018년 9월 26일
it works fine on my machine even with mesh densities 100x this, the mesh density doesn't matter, the transient solution is not working. I'm more concerned about how to use the PDE toolbox with the parallel computing toolbox

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R2018a

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