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Questions related to solving the advection-diffusion equation using numerical methods, including derivation and implementation of boundary conditions.

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CFL Condition and Convection Diffusion Equation in 2D

I am solving the convection-diffusion equation in 2D using Finite Differences with the $\theta$ scheme. The velocity of the fluid and the diffusion coefficient is low in my case (in the range of $10^{ …
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