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f coefficient in PDEtool: exponential function of state.u

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diana bianchi 2021-12-9

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回答： Priyanka Kondapalli 2022-2-9

Hi,

I am currently working on solving a pde imposing c coefficient as an exponential function of the unknow and the location, as below:

cCoef= @(location,state) k.*(exp(state.u-location.y));

specifyCoefficients(model,'m',0,'d',0,'c',cCoef,'a',0,'f',0);

However, when I run the code it does not to consider the exponential relationship.

I could not find any question answering this problem, only addressing how to write a coefficent dependent only on location or only on the unknow.

Thanks,

Diana

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回答（1 个）

Priyanka Kondapalli 2022-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/1606810-f-coefficient-in-pdetool-exponential-function-of-state-u#answer_891900

Hi,

Below are few links that can help you guide during the exponential function

Exponential - MATLAB exp (mathworks.com)

Coefficients of polynomial - MATLAB coeffs (mathworks.com)

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Mathematics and Optimization Partial Differential Equation Toolbox General PDEs

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