# Tagged Questions

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### Numerical Solution of the Convection Dispersion equation

I have asked this question on Computational Science and also on Mathoverflow, but no satisfactory answers so far. I thought maybe the physics community could shed some insight on the issue. I am ...
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### 9-point stencil “equivalent” for advection equation

So I inherited from some people a code that solves the advection-diffusion-reaction equation for a particular system. The original code was first implemented in 1D which worked fine in cartesian ...
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### How to produce a 3D density map of a time-depenent system of particles?

I have a time-dependent system of varying number of particles (~100k particles). In fact, each particle represents an interaction in a 3D space with a particular strength. Thus, each particle has ...
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### Quantum system numerical simulation [duplicate]

I'm a student doing a research on computer program in quantum system. I found a challenge when I was writting a program of Euler method in Fortran 77 for a simple function y'=-y^2 before using a ...
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### Why do Runge Kutta's method and Euler's are so different? [migrated]

I am solving a $\underline {\dot A}=\underline A\cdot \underline x$ system of linear equations numerically. I have don'e this in the popular of methods of Euler and Runge Kutta. I have noticed a ...
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### Can I use Runge-Kutta to solve these equations?

Edit: I'm going to give some more background and derivation to show how I got to these equations. I am basically following the derivation that is found in the appendix of the following paper: ...