Answered

pde themral model, thermally connect two cells

Hi Derek, Multidomains in the imported geometry, using STL file, are not recoganized as connected cells of the same geometry. ...

pde themral model, thermally connect two cells

Hi Derek, Multidomains in the imported geometry, using STL file, are not recoganized as connected cells of the same geometry. ...

13 days ago | 0

Answered

Simple compression of cylinder- results of finite element model don't make sense

Hi Clay, Your BCs are correct. I think the load you are applying is resulting in very small defomration. This is causing the d...

Simple compression of cylinder- results of finite element model don't make sense

Hi Clay, Your BCs are correct. I think the load you are applying is resulting in very small defomration. This is causing the d...

13 days ago | 0

| accepted

Answered

error in heat transfer example

Hi Charlie, What version of MATLAB are you running R2018a or R2018b. In any case, you should not see this error if you run t...

error in heat transfer example

Hi Charlie, What version of MATLAB are you running R2018a or R2018b. In any case, you should not see this error if you run t...

16 days ago | 0

| accepted

Answered

PDE Toolbox: Using different temperature-dependent thermal conductivities

I did not realize this in my initial response, both of your k values goes to inf when u=0. Try the following following instead, ...

PDE Toolbox: Using different temperature-dependent thermal conductivities

I did not realize this in my initial response, both of your k values goes to inf when u=0. Try the following following instead, ...

23 days ago | 0

Answered

PDE Toolbox: Using different temperature-dependent thermal conductivities

Both k1 and k2 yields zero when state.u = 0, this is causing solver to misinterpret them as same functions. You can get around t...

PDE Toolbox: Using different temperature-dependent thermal conductivities

Both k1 and k2 yields zero when state.u = 0, this is causing solver to misinterpret them as same functions. You can get around t...

24 days ago | 0

Answered

nonzero m and d coefficients for Matlab PDE

Refer to this documentation: https://www.mathworks.com/help/pde/ug/pde.pdemodel.specifycoefficients.html#bu7pwf5 d has to be a...

nonzero m and d coefficients for Matlab PDE

Refer to this documentation: https://www.mathworks.com/help/pde/ug/pde.pdemodel.specifycoefficients.html#bu7pwf5 d has to be a...

1 month ago | 0

| accepted

Answered

How to indicate the number of nodes and elements of mesh of PDE problem in command line? (the function pdeplot can't do this)

Try using: pdemesh(modelM,'NodeLabels','on') Does it not show labels of node for you?

How to indicate the number of nodes and elements of mesh of PDE problem in command line? (the function pdeplot can't do this)

Try using: pdemesh(modelM,'NodeLabels','on') Does it not show labels of node for you?

1 month ago | 0

Answered

PDE Thermal model computation speed

Hi Juan, Nonconstant BC would take longer than constant BC. However, the increase you are observing seems abnormal, given that...

PDE Thermal model computation speed

Hi Juan, Nonconstant BC would take longer than constant BC. However, the increase you are observing seems abnormal, given that...

1 month ago | 0

Answered

How to incorporate a 3D mesh in [p,e,t] format on a PDE thermal model?

You can attempt to use geometryFromMesh function to import geometry as a mesh (also retain the original mesh). Regards, Ra...

How to incorporate a 3D mesh in [p,e,t] format on a PDE thermal model?

You can attempt to use geometryFromMesh function to import geometry as a mesh (also retain the original mesh). Regards, Ra...

2 months ago | 0

Answered

How to apply external heat flux to a surface with specified "emissivity" boundary conditions in MATLAB R2018 PDE Toolbox?

You can specify all heat fluxes on that BC with a single function call, like: thermalBC(thermalmodelT,'Edge',2,'HeatFlux',@So...

How to apply external heat flux to a surface with specified "emissivity" boundary conditions in MATLAB R2018 PDE Toolbox?

You can specify all heat fluxes on that BC with a single function call, like: thermalBC(thermalmodelT,'Edge',2,'HeatFlux',@So...

2 months ago | 0

| accepted

Answered

How to impose a variable temperature distribution for one edge of a rectangular plate while keeping the temperatures of other three edges same and constant?

Hi Anik, Define a function to model variation of temperature and use it in BC specification: tFunc = @(region,state) 30.*sin(...

How to impose a variable temperature distribution for one edge of a rectangular plate while keeping the temperatures of other three edges same and constant?

Hi Anik, Define a function to model variation of temperature and use it in BC specification: tFunc = @(region,state) 30.*sin(...

2 months ago | 1

| accepted

Answered

Assigning faces or cells fro meshes created by distmesh

Hello Lewis, To get multiple subdomains into PDE Toolbox you need to use the four argument format of the geometryFromMesh. Lik...

Assigning faces or cells fro meshes created by distmesh

Hello Lewis, To get multiple subdomains into PDE Toolbox you need to use the four argument format of the geometryFromMesh. Lik...

3 months ago | 0

Answered

Compute Craig Bampton model reduction using structural PDE toolbox

Hi Alberto, I see have asked this question a while ago, hope it is still relevant to you. Could you elaborate your use case a ...

Compute Craig Bampton model reduction using structural PDE toolbox

Hi Alberto, I see have asked this question a while ago, hope it is still relevant to you. Could you elaborate your use case a ...

3 months ago | 0

Answered

How to export things from pdetool?

You can export gometry related information from pdetool from the 'Draw' menu, last option. You might also consider other geomet...

How to export things from pdetool?

You can export gometry related information from pdetool from the 'Draw' menu, last option. You might also consider other geomet...

3 months ago | 0

Answered

Control mesh size on the faces of a 3D Structural Model

Local mesh refinement is currently not availbale in PDE Toolbox.

Control mesh size on the faces of a 3D Structural Model

Local mesh refinement is currently not availbale in PDE Toolbox.

3 months ago | 0

Answered

How to extract data from a stress displacement graph generated by pdeplot3d?

Use the function interpolateStress. For example, in your case you could do: intrpStress = interpolateStress(structuralresults,0...

How to extract data from a stress displacement graph generated by pdeplot3d?

Use the function interpolateStress. For example, in your case you could do: intrpStress = interpolateStress(structuralresults,0...

4 months ago | 0

| accepted

Answered

Is it possible to calculate the reaction forces in a PDEModel if i use enforced displacement as load?

You can evaluate reaction at the boundary using evaluateReaction function.

Is it possible to calculate the reaction forces in a PDEModel if i use enforced displacement as load?

You can evaluate reaction at the boundary using evaluateReaction function.

4 months ago | 0

Answered

What is wrong about my "specifyCoefficients" function use for PDEModel?

Can you try using: specifyCoefficients(model,'m',0,'d',d_mod,'c',c_mod,'a',0,'f',f_mod); and see if you get the solution? Reg...

What is wrong about my "specifyCoefficients" function use for PDEModel?

Can you try using: specifyCoefficients(model,'m',0,'d',d_mod,'c',c_mod,'a',0,'f',f_mod); and see if you get the solution? Reg...

5 months ago | 0

| accepted

Answered

it's possible to update nodes value in a mesh that was created with pde toolbox?

Hello Gabriel, You can achieve this using geometryFromMesh function. Following your example: results = solvepde(model); u = ...

it's possible to update nodes value in a mesh that was created with pde toolbox?

Hello Gabriel, You can achieve this using geometryFromMesh function. Following your example: results = solvepde(model); u = ...

5 months ago | 1

| accepted

Answered

Does the importgeometry command work to import any geometry in simmechanics ?

Currently only STL import is supported in importGeometry.

Does the importgeometry command work to import any geometry in simmechanics ?

Currently only STL import is supported in importGeometry.

5 months ago | 0

Answered

Is it possible to export stresses computed with the PDE Modeler App?

I would suggest using the programmatic workflow instead of PDEModeler, where you get direct access to solution and its derived q...

Is it possible to export stresses computed with the PDE Modeler App?

I would suggest using the programmatic workflow instead of PDEModeler, where you get direct access to solution and its derived q...

5 months ago | 1

| accepted

Answered

PDE modeler plotting method

You can export solution from Solve dropdown menu. You will have the solution for all time-steps as variable 'u' in your workspac...

PDE modeler plotting method

You can export solution from Solve dropdown menu. You will have the solution for all time-steps as variable 'u' in your workspac...

5 months ago | 0

Answered

What does deflection mean in Structural Mechanics PDE Toolbox?

a) Results output from PDE Toolbox contains Displacements wstruct array ith ux, uy, and uz as fields, these values are displace...

What does deflection mean in Structural Mechanics PDE Toolbox?

a) Results output from PDE Toolbox contains Displacements wstruct array ith ux, uy, and uz as fields, these values are displace...

5 months ago | 0

| accepted

Answered

Time-dependent boundary condition in PDE Toolbox

Hi Alexis, Replace the BC assignment line: Tgauche = applyBoundaryCondition(pdem,'Edge',4, 'u', sin(350*t).^2); with mybc =...

Time-dependent boundary condition in PDE Toolbox

Hi Alexis, Replace the BC assignment line: Tgauche = applyBoundaryCondition(pdem,'Edge',4, 'u', sin(350*t).^2); with mybc =...

5 months ago | 1

| accepted

Answered

Stationary Convection-Diffusion Equation 2-D

Hi Andrea, I suggest using <https://www.mathworks.com/help/pde/ug/solve-problems-using-pdemodel-objects.html programmatic> w...

Stationary Convection-Diffusion Equation 2-D

Hi Andrea, I suggest using <https://www.mathworks.com/help/pde/ug/solve-problems-using-pdemodel-objects.html programmatic> w...

6 months ago | 0

| accepted

Answered

About PDETOOL in 3-D

Use programmatic workflow for 3-D problems. An outline of the programmatic workflow is shown in the <https://www.mathworks.com/h...

About PDETOOL in 3-D

Use programmatic workflow for 3-D problems. An outline of the programmatic workflow is shown in the <https://www.mathworks.com/h...

6 months ago | 0

Answered

thermal conductivity, pde toolbox

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

thermal conductivity, pde toolbox

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

6 months ago | 0

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...

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 months ago | 0

| accepted

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 ...

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 months 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...

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 months ago | 1

| accepted