Hello everyone,
i've extracted a 2D grid from an FVM model (Fig. 1). My gridpoints (blue dots) perfectly cover the topology i'm modeling. I want to interpolate a dataset, lets say my velocity distribution, on this grid. My U vector contains the same number of points as my x and y vectors. If i use meshgrid to generate the grid from the given sample points the delaunay triangulation is bounded by the red polygon, not my gridpoints. This results in a deformed mesh (Fig. 2).
Can anybods tell me how to generate a mesh that covers only my gridpoints?
Hi Robert,
I'm not a Matlab expert, but maybe the interp2 function could be helpful: https://de.mathworks.com/help/matlab/ref/interp2.html?requestedDomain=www.mathworks.com
Good luck, Ralf
Hello Ralf,
the interp2 function is of no use to me as it requries a grid. But meshgrid results in the deformed grid shown above. So the question is more like: "How do i generate a grid only bounded by my points?" than "How do i interpolate on my grid?".
Thank you for your input non the less. Maybe it'll be usefull once i generated the grid.
Ok, I understand. In this case you should look for the bivariate spline functions, see https://de.mathworks.com/help/curvefit/examples/bivariate-tensor-product-splines.html
What about scatteredInterpolant class ?
https://www.mathworks.com/help/matlab/ref/scatteredinterpolant.html
- Badges
- Science topic
- Similar topics
- Computer Science and Engineering
- Computer Graphics and Animation
- 3D