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Basilisk source code

## root / src / tracer.h.page

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45  /** # Tracer advection event This event integrates advection equations of the form $$\partial_tf_i+\mathbf{u_f}\cdot\nabla f_i=0$$ where $\mathbf{u_f}$ is the velocity field and $f_i$ are a list of passive tracers. The tracers list is defined elsewhere (typically by the user), the face vector field uf and the timestep dt are defined by a solver. */ extern scalar * tracers; extern face vector uf; extern double dt; /** On adaptive meshes, tracers need to use linear interpolation (rather than the default bilinear interpolation) to ensure conservation when refining cells. */ #if TREE event defaults (i = 0) { for (scalar s in tracers) { s.refine = refine_linear; s.restriction = restriction_volume_average; } } #endif /** The integration is performed using the Bell-Collela-Glaz scheme. */ #include "bcg.h" event tracer_advection (i++,last) { advection (tracers, uf, dt); } /** Diffusion can be added by overloading this hook. */ event tracer_diffusion (i++,last);