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Questions tagged [elements]

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2
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1answer
96 views

Boundary elements method — calculation of solid angle

I am developing a BEM code based on a deal.ii tutorial, see https://www.dealii.org/8.3.0/doxygen/deal.II/step_34.html . Consider the Poisson equation $$ \Delta u=-f\,, $$ and its Green's function $G\...
0
votes
1answer
70 views

Comparing the following mesh grids for a star-shaped plate

Between these four different meshes for the same shape, compare them whilst considering the different results for displacement and stress. Moreover the difference in computational cost and accuracy of ...
8
votes
2answers
192 views

How many cells/elements do I need?

I'm relatively new in the CFD modelling and I'm making a VOFmodel of a rectangular box (lxwxh 120x80x8m) with an inlet (wxh 10x8) at the long side. The pressure outlet is the upper-face of the box (...
2
votes
2answers
4k views

Matlab element within ranges and distance between two points

I have a 53534x3 matrix with x, y and z coordinates. I want to find the element of matrix within ranges as follows: ...
5
votes
1answer
242 views

Are serendipity elements still polynomially complete when the quadrilateral is skewed?

I have not implemented these elements before, but I like their reduced cardinality compared to (e.g.) a tensor product of lagrange interpolants, which is very "overcomplete" (especially for orders>2) ...