sinusoidal time dependent boundary condition - pde toolbox

Question

yonatan s 2017-6-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/345636-sinusoidal-time-dependent-boundary-condition-pde-toolbox

评论： yonatan s 2017-6-23

采纳的回答： Alan Weiss

在 MATLAB Online 中打开

hello,

i would like to have a sinusoidal time dependent BC. i didnt find an example of this in the related docs.

this is the relevant part of the code

tlist=0:30:360;
Flux= @(region,state) sin(2*pi*state.time)*F
b=applyBoundaryCondition(model,'neumann','Face',1,'q',0,'g',Flux,'Vectorized','on');

i want the bc to osicllate with time period of 30. is this the correct way of doing this?

thank you.

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Answer 1

Alan Weiss 2017-6-21

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链接

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https://ww2.mathworks.cn/matlabcentral/answers/345636-sinusoidal-time-dependent-boundary-condition-pde-toolbox#answer_271416

Depending on your software version, that looks correct. The relevant documentation is here. But, if you are hoping to calculate the sin of something in degrees (not radians), use the sind function instead of sin.

Alan Weiss

MATLAB mathematical toolbox documentation

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yonatan s 2017-6-23

i have another question about this topic. my solution matrix is of vectors with the solutions at time (2pi*t), which will always be zero for my time periods (t=30,60,90..), so how could i see any oscillations?

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