Can you get solutions from nodes internally on a 3D model in PDE or just from the surface of the model?

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Kevin Giles 2020-11-16

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https://ww2.mathworks.cn/matlabcentral/answers/650028-can-you-get-solutions-from-nodes-internally-on-a-3d-model-in-pde-or-just-from-the-surface-of-the-mod

评论： Priysha LNU 2020-11-25

I am solving a 3d model using the transient heat transfer pde toolbox. The 3d model was imported as an stl file. I am trying to get the temperature profile in the centre of the model but I am not sure if this is possible. I think all the data I am getting are from nodes on the surface. Is it possible to locate nodes within the model itself?

For example this location should be in the centre of the model (0,0,-0.0295674) and this one should be on the surface (0,-0.00969541,-0.0295674), however when i find the closest node it returns the same node and hence the same temperature values. Could this be because my 'Hmax' in my mesh isnt small enough? Or is what I am trying to do possible?

Thanks

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Kevin Giles 2020-11-17

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Would this work, if I was for example looking for the temperature in the very centre of the object.

[X,Y,Z] = meshgrid(0,0,0);
Tintrp = interpolateTemperature(R,X,Y,Z,1:length(time));

It seems to be returning reasonable values, I am just unsure on what the function of the meshgrid is?

Thanks

Priysha LNU 2020-11-25

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Hi,

meshgrid(0,0,0)

The above 'meshgrid()' function will return a 3-D grid coordinates defined by input (0,0,0) here. Generally,

the meshgrid() function can return a 2-D or a 3-D grid depending on the number of inputs
the inputs to this function are vectors defining the x-coordinates, y-coordinates,and z-coordinates.

For more details, refer to the following documentation links:

https://www.mathworks.com/help/matlab/ref/meshgrid.html

Hope this helps!

DISCLAIMER: These are my own views and in no way depict those of MathWorks.

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