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

6 years 前 | 1

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

6 years 前 | 1

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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 ...

6 years 前 | 0

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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...

6 years 前 | 1

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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...

6 years 前 | 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...

6 years 前 | 0

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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...

6 years 前 | 1

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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...

6 years 前 | 1

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已回答
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=...

6 years 前 | 2

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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 ...

6 years 前 | 1

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已解决

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

6 years 前

已解决

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

6 years 前

已解决

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

6 years 前

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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/...

6 years 前 | 1

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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...

6 years 前 | 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...

6 years 前 | 0

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已回答
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...

6 years 前 | 2

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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 前 | 1

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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 前 | 0

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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 前 | 0

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已回答
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 前 | 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 前 | 0

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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 前 | 1

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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 前 | 0

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已回答
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 前 | 0

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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 前 | 0

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已回答
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 前 | 1

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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 前 | 1

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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 前 | 0

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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 前 | 0