Answered
thermal conductivity, pde toolbox
Hi Juan, Looks like you have orthotropic thermal conductivity, not spatially varying conductivity. in that case, you can jus...

7 years ago | 1

Answered
thermal conductivity, pde toolbox
Hi Juan, I recommend using the new <https://www.mathworks.com/help/pde/heat-transfer-and-diffusion-equations.html ThermalMod...

7 years ago | 1

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Answered
Set a noncontinous 2d heat source in PDE toolbox
As the message indicates, the function should take 2 input arguments (which your function does, no problem here). However, your ...

7 years ago | 0

Answered
PDE toolbox and non-constant coefficients
Hello Flo, Your understanding of the function_handle and c-coefficient are correct. The state.u is the value of the solution...

7 years ago | 1

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Answered
Is there any way to speed up the PDE solver with the parallel computing toolbox?
Your mesh density is too high. I could not get the mesh generated on my machine in a reasonable time. This means, there are larg...

7 years ago | 0

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PDE solver on 2D sphere
If you are referring to thin walled hollow sphere, a 3-D volume as your problem domain, then you can create such geometry in PDE...

7 years ago | 0

Answered
How to Identify the Node Indices for Points on a Face? (PDE Toolbox)
I would suggest upgrading to R2018a or newer version, which has several mesh query functions, such as <https://www.mathworks.co...

7 years ago | 1

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Answered
Create tetrahedral mesh out of figure
Assuming you are trying to use PDE Toolbox, you can use the multicylinder function to create cylinder geometry and mesh as shown...

7 years ago | 1

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Answered
solvepde fails on complex 'f' coefficient
Hi Yauhen, The expression exp((r.x.^2+r.y.^2)/2).*exp(-1i.*s.time) evaluates to real 1 when s.time =0, r.x= 0, r.y=...

7 years ago | 2

Answered
Is it possible to apply load on nodes?
Hello Mohammadmahdi, Sorry for the delay. I have shown below an example that should guide you to model your problem. This is ...

7 years ago | 1

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Answered
Error with setting initial condition from previously obtained solution
Hi Ryan, Ability to restart from previous solution was introduced in R2016b, refer to the <https://www.mathworks.com/help/...

7 years ago | 1

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Answered
PDE toolbox pulse source term in heat equation
Hi Nicolas, What version of MATLAB are you running? I can run you code in R2018a, which produced the temperature distributio...

7 years ago | 0

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Accelerating PDE-Solving with Parallel Computing Toolbox
Hello Marion, The solvers such as solvepde or parabolic are not parallel solvers, so you won't be able to speedup using Paral...

7 years ago | 0

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Answered
von Mises Stress due to Centrifugal force on a rotor
Hi Sridhar, Centrifugal load is not yet supported in structural workflow. However, for a specific geometry you can define th...

7 years ago | 2

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Answered
PDE Toolbox - How to specify coefficient for both temperature and region dependent properties
The region.y is a vector, so using vector multiplication should solve your issue. Try using this expression for k_TM k_TM =...

7 years ago | 1

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Answered
Why is my computation time increasing every loop for transient heat transfer pde model?
The reason for increase in the time is due to the two thermalIC call that you make within the loop. Note that each call to therm...

7 years ago | 0

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Answered
I found an error in the "strain.exy" function from PDE toolbox, can someone confirm?
Hello Gottfried, I confirmed that this is a bug. This will be fixed in a upcoming release. I am sorry of the inconvenience a...

7 years ago | 0

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Answered
How should I choose maximum mesh size for thin elements?
Your setup seems to be resulting in an ill-conditioned system of equations. Hard to tell without seeing the actual setup. Contac...

7 years ago | 0

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Plot Slice of pdeplot3D
Take a look at the examples in <https://www.mathworks.com/help/pde/examples/contour-slices-through-a-3-d-solution.html Contour S...

7 years ago | 0

Answered
PDE Toolbox,How to define the interpolate method of finite element method?
If you are asking for shape functions of FEM, then there are two option 'linear' and 'quadratic', check the documentation page o...

7 years ago | 1

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Answered
Export geometry out of model container
You can get this information easily in the latest version of MATLAB, which is R2018a. The function you need to use is <https://w...

7 years ago | 0

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Answered
Boundary Conditions for plane stress
Refer to the <https://www.mathworks.com/help/pde/examples/stress-concentration-in-plate-with-circular-hole.html plate with a hol...

7 years ago | 0

Answered
When solving a PDE, how to assign different conductivity values to different volume regions?
Hi Mark, You sure can! Use 'Cell' parameter in specifyCoefficients, like: specifyCoefficients(model,'Cell',1,'m',0,'...

7 years ago | 0

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Answered
3D conduction equation in cylinder
You can solve the 3-D conduction equation on a cylindrical geometry using the <https://www.mathworks.com/help/pde/heat-transfer-...

7 years ago | 1

Answered
Finding the node near the middle of a 3D model for transient heat transfer anaysis
You can get the temperature at the geometric center, say (xc,yc,zc), using the <https://www.mathworks.com/help/pde/ug/pde.steady...

7 years ago | 1

Answered
Confine "structuralBoundaryLoad" to a specific region of a face?
You can use the function_handle approach to define the load to act only on a portion of a Face. You can identify the portion of ...

7 years ago | 0

Answered
we don't have pde toolbox licenece, we have simulink licenece only, can i solve pde for defection of bar with simulink matlab
You need PDE Toolbox to create a model using createpde and solve the problems using FEM. If you are interested in solving for dy...

7 years ago | 0

Answered
Doubts on specifying 2-D "c" coefficients in Function Form
You might be referring to the old workflow. Please refer to the "Functional Form" section of <http://www.mathworks.com/help/pde/...

7 years ago | 0

Answered
Taking gradient of solution and plotting results in very weird and unsmooth graphs?
I would suggest you use the <https://www.mathworks.com/help/pde/ug/pde.stationaryresults.evaluategradient.html evaluateGradient>...

7 years ago | 0

Answered
can i solve 2 dimensional advection diffusion equation in pde toolbox
PDE Toolbox does not provide a coefficient to specify advection terms of the PDE. You could try providing them as nonlinear f-co...

7 years ago | 0