void Simulation:: initialize()
{
const double Ly = sim_region.length.y;
const double Lx = sim_region.length.x;
U.ldz();
P.ldz();
bubbles.empty();
for( unit_t j=lower.y;j<=upper.y;++j)
{
for( unit_t i=lower.x;i<=upper.x;++i)
{
P[j][i] = Y[j] / Ly;
P[j][i] = 0.1 * (0.5 - Alea());
U[j][i].y = 0.04 + 0.08 * cos( numeric<double>::pi * Y[j] / Ly );
U[j][i].y = 0.15;
}
}
if( master )
{
Bubble *b = bubbles.create();
//b->map_peanut( Vertex(sim_box.x/2,0), 0.15 * Lx, 0.9 + 0.09 * Alea() );
b->map_circle(Vertex(sim_box.x/3,0), 0.15 * Lx);
b->set_pressure(2);
}
cycle = 0;
bubbles_velocities = true;
compute_fields();
}
void Bubble:: map_circle(const Vertex ¢er, Real radius)
{
assert(lambda>0);
empty();
const Real theta_max = 2 * atan( lambda/(radius+radius) );
const size_t nmin = max_of<size_t>(3,size_t( ceil( numeric<Real>::two_pi/theta_max) ));
const Real dtheta = numeric<Real>::two_pi / nmin;
const Real theta0 = numeric<Real>::two_pi * Alea();
for( size_t i=0; i < nmin; ++i )
{
const Real theta = i * dtheta + theta0;
Tracer *p = append();
p->vertex.x = center.x + radius * Cos( theta );
p->vertex.y = center.y + radius * Sin( theta );
}
raw_initialize();
}
double Exponentielle (double lambda)
{
return -((double) log(1 - Alea())/log(10))/lambda;
}
