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/** | ||
# Droplet Coalescence with Phase Change | ||
We modify the [coalescence.c](/sandbox/popinet/coalescence.c) file using the clsvof approach and including phase change with a simple isothermal evaporation model. | ||
![Evolution of the velocity field](coalescence/movie.mp4) | ||
![Evolution of the species mass fractions](coalescence/species.mp4) | ||
*/ | ||
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#include "grid/multigrid.h" | ||
#include "navier-stokes/centered-evaporation.h" | ||
#include "navier-stokes/centered-doubled.h" | ||
#include "two-phase-clsvof.h" | ||
#include "integral.h" | ||
#include "evaporation.h" | ||
#include "species-gradient.h" | ||
#include "view.h" | ||
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double Dmix1, Dmix2, YIntVal; | ||
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u.n[top] = neumann (0.); | ||
u.t[top] = neumann (0.); | ||
p[top] = dirichlet (0.); | ||
uext.n[top] = neumann (0.); | ||
uext.t[top] = neumann (0.); | ||
pext[top] = dirichlet (0.); | ||
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u.n[bottom] = neumann (0.); | ||
u.t[bottom] = neumann (0.); | ||
p[bottom] = dirichlet (0.); | ||
uext.n[bottom] = neumann (0.); | ||
uext.t[bottom] = neumann (0.); | ||
pext[bottom] = dirichlet (0.); | ||
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u.n[left] = neumann (0.); | ||
u.t[left] = neumann (0.); | ||
p[left] = dirichlet (0.); | ||
uext.n[left] = neumann (0.); | ||
uext.t[left] = neumann (0.); | ||
pext[left] = dirichlet (0.); | ||
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u.n[right] = neumann (0.); | ||
u.t[right] = neumann (0.); | ||
p[right] = dirichlet (0.); | ||
uext.n[right] = neumann (0.); | ||
uext.t[right] = neumann (0.); | ||
pext[right] = dirichlet (0.); | ||
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int main() | ||
{ | ||
size (4. [*]); | ||
origin (-L0/2. [*], -L0/2. [*]); | ||
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rho1 = 1. [*], rho2 = 1. [*]; | ||
mu1 = 1e-2 [*], mu2 = 1e-2 [*]; | ||
Dmix1 = 0., Dmix2 = 1.e-2; | ||
YIntVal = 0.6; | ||
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const scalar sigmav[] = 1.; | ||
d.sigmaf = sigmav; | ||
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run(); | ||
} | ||
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event init (t = 0) | ||
{ | ||
fraction (f, max (- (sq(x + 1.) + sq(y) - sq(0.5)), | ||
- (sq(x - 1.) + sq(y) - sq(0.5)))); | ||
foreach() | ||
d[] = max (- (sq(x + 1.) + sq(y) - sq(0.5)), | ||
- (sq(x - 1.) + sq(y) - sq(0.5))); | ||
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foreach() { | ||
u.x[] = - sign(x)*f[]; | ||
uext.x[] = u.x[]; | ||
} | ||
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foreach() { | ||
YL[] = f[]; | ||
YG[] = 0.; | ||
Y[] = YL[] + YG[]; | ||
} | ||
} | ||
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event movie (t += 0.04; t <= 6.) | ||
{ | ||
clear(); | ||
squares ("u.x", spread = -1, linear = true); | ||
draw_vof ("f"); | ||
box(); | ||
save ("movie.mp4"); | ||
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clear(); | ||
squares ("Y", min = 0., max = 1., linear = true); | ||
draw_vof ("f"); | ||
box(); | ||
save ("species.mp4"); | ||
} | ||
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