# Questions tagged [grid]

For questions about solving numerical problems by evaluating over a discrete grid of points in the problem domain.

55 questions
Filter by
Sorted by
Tagged with
66 views

### Algebraic Grid Generation

I am new to the topic " Algebraic Grid Generation". I want to find a simple example where we solve the host equation, let us say the heat equation, numerically in the computational domain ...
41 views

4k views

### Three dimensional irregular grid data interpolation to regular grid

I have three-dimensional radar reflectivity data obtained as voxels (scans, rays, altitudes). The data has been sampled at irregular spacings and I want to convert this into a regular grid. In ... 57 views

### Converting mass density to point mass approximation on a grid

In an nbody gravity simulation, instead of doing exact(all-pair brute force) solution, I added masses of each body into cells of a 3D grid(each cell is just a float value having a mass value). Then ...
1 vote
169 views

### Choice of velocity grid - staggered or not?

I'm trying to understand when and why one would use a staggered vs. a colocated grid in problems that have velocities and scalars that they transport (e.e. density). If scalars are defined cell-...
1 vote
71 views

### adaptive / smart grid choice for dynamic programming

I've a read a paper about investing where they used a dynamic programming approach to solve a finite horizon problem, i.e. $$\max_{x_t} E[u(W_T)]$$ where $u$ is a utility function and $W_T$ ...
1 vote
188 views

### Grid mapping from Tchebyshev

I am using Tchebyshev discretization to solve a system of PDEs. Usually, I map the Tchebyshev space($\xi$, from -1 to 1) to physical space ($x$, from 0 to L) using $$x = (\xi +1)*L/2$$ Now, I also ...
68 views

### Efficient Representation of (spatially sparse) spatial time series

Background I have a huge dataset consisting of points (on a plane) together with a timestamp for each point. This is a collection of car GPS measures, giving us the location (latitude/longitude) of ...
55 views