Answered
Best toolboxes for my needs?
For FEA, FEM, and CFD simulations the <https://www.mathworks.com/products/pde.html PDE Toolbox> or <https://www.featool.com FEAT...

7 years ago | 0

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Non-linear differential dquation
As per your previous question <https://www.mathworks.com/matlabcentral/answers/368440-how-to-solve-fick-s-2nd-law-of-diffusion-e...

7 years ago | 0

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Answered
Matlab code for solving 2D Laplace pde
Sparse linear solvers are already available in Matlab, the backslash operator per default uses the Umfpack direct solver y...

7 years ago | 0

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3D diffusion equation in cylinder
Modelling and simulation of convection and diffusion for a 3D cylindrical (and other) domains is possible with the <https://www....

7 years ago | 0

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How to solve fick's 2nd law of diffusion equation?
<http://www.featool.com/doc/physics.html#phys_cd Modeling and simulation of convection and diffusion> is certainly possible to s...

7 years ago | 2

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Answered
How to find the maximum length in a structure of vectors?
If by "maximum length" you mean the number of struct entries, then you can just use one of the standard *length*, *numel*, or *s...

7 years ago | 1

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Mesh Plotting in Matlab
The following will plot quadrilaterals from your grid (if you prefer triangles you can use the *patch* command) x = 0 : 0...

7 years ago | 0

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Information about meshgrid in pdetool. How can I define specific mesh?
If you prefer to set up and solve heat transfer plate and other PDE problems with a structured quadrilateral mesh, it is possibl...

7 years ago | 0

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Assembling global matrix from element matrices based on location.
Normally you would have a list of integer pointers between local and global degrees of freedom constructed from the mesh connect...

7 years ago | 0

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How can I solve the equation of curvature on PDE Toolbox?
∥∇f∥ should typically be *sqrt(fx^2+fy^2+eps)* where eps is a small constant to avoid divisions by zeros (since ∥∇f∥ is in the d...

7 years ago | 0

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Create laplacian smoothing matlab
You can get something quite similar with the following code, and tune it by playing around with the <http://www.featool.com/doc/...

7 years ago | 0

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Did anyone developed a code/function to create Stiffness matrix of 8-Node Brick (Hexahedral) in Finite Element Analysis ?
For a single element you can just create a grid with one cell, for example using grid = blockgrid(1); in the example ab...

7 years ago | 0

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Did anyone developed a code/function to create Stiffness matrix of 8-Node Brick (Hexahedral) in Finite Element Analysis ?
Q1 hexahedral elements are available and pre-defined with the FEATool toolbox. Once installed, the following code assembles a bi...

7 years ago | 0

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MATLAB Addons for FEM?
You can use the Matlab <https://www.mathworks.com/products/pde.html PDE Toolbox> or <https://www.featool.com FEATool FEM Toolbox...

7 years ago | 2

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Answered
delaunaytriangulation function: How to associate triangles with edges?
With the <https://www.featool.com/doc/gridedge_8m.html gridedge> function included with the <https://www.featool.com Matlab FEA ...

7 years ago | 0

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Is there any way to solve an advection heat equation in pdetool box?
This <http://www.featool.com/doc/quickstart.html#ex_he1 coupled fluid flow heat transfer model> might be a good starting point. ...

7 years ago | 2

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PDE Toolbox Structural mechanics Static bending of a beam with material properties varying inside the beam
Perhaps you can modify this <http://www.featool.com/tutorial/2017/05/30/Euler-Bernoulli-Beam-Matlab-Simulation-in-FEATool-Multip...

7 years ago | 0

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hello every one , I have a 3d cylinderical shape with temperature distributed in this cylinder in a given function. the question is , can this be ploted by matlab??
Another option if you for example want to <http://www.featool.com/tutorial/2017/09/06/Matlab-Plotly-3D-Unstructured-Visualizatio...

7 years ago | 2

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PDE Thermal Model with heat produced as a function
If you are using the FEATool Multiphysics Toolbox it is possible enter PDE coefficients as regular string expressions, for examp...

7 years ago | 0

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magnetic fiel simulator tools ?
FEATool <https://www.featool.com/multiphysics Multiphysics> has built-in physics modes for Electrostatics simulations, you can f...

7 years ago | 0

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how i can program the following function of (convection-convection) in matlab??
With the <https://www.featool.com FEATool Multiphysics Matlab FEM Toolbox> you can enter your own <http://www.featool.com/tutori...

7 years ago | 1

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How to plot solid tetrahedrons in MATLAB?
With the coordinates and connectivities in your example, and the <https://www.featool.com Matlab FEM Toolbox>, you can create a ...

7 years ago | 0

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Matlab: 2d linear elasticity PDE
2D linear elasticity (plane stress, plane strain, and axisymmetric stress-strain) for small displacements are available as pre-d...

7 years ago | 0

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How can I solve PDE with boundary condition?
Alternatively, if you still prefer to solve it as a PDE, you can quite easily input and solve it with the <https://www.featool.c...

7 years ago | 0

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PDE solver without PDE solver toolpack
Depending on your problem the FEATool FEM Toolbox could possibly work for your case as both modeling and simulation of <http://w...

7 years ago | 0

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How to plot temperature distribution T(X,Y) over a 2D rectangular plate in Matlab?
You can use the <https://www.featool.com/ FEATool FEM toolbox> and postprocessing function to <https://www.featool.com/tutorial/...

7 years ago | 0

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Coupling transport of a species to surface reactions
The <https://www.featool.com FEATool Multiphysics Matlab FEM toolbox> allows for easy coupling and <https://www.featool.com/matl...

7 years ago | 0

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How does MATLAB build the mass matrix for 6-node triangle meshes?
In the FEATool Multiphysics FEM toolbox the finite element shape functions are defined quite easily and available in the <http:/...

7 years ago | 0

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Sparse FEM Matrix build inefficiency
Although looping over all element, finite element forms, and quadrature points is the typical fem assembly approach, even with t...

7 years ago | 0

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solution of system of coupled partial differential equations
One way to approach this is, due to the 2nd derivative in time, to split the time dependent variables into du1/dt = u1h ...

7 years ago | 0