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Fix air-particle heat transfer

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Heat transfer rate is proportional to temperature difference.

Previously, the code caused the temperature change to be proportional to
absolute temperature.
This commit is contained in:
jacksonmj 2011-06-01 22:38:04 +01:00 committed by Simon Robertshaw
parent 744854ef36
commit 469de0cae0
1 changed files with 5 additions and 12 deletions
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15
src/powder.c
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@ -1610,23 +1610,16 @@ void update_particles_i(pixel *vid, int start, int inc)
}
//heat transfer code
c_heat = 0.0f;
h_count = 0;
if (t&&(t!=PT_HSWC||parts[i].life==10)&&ptypes[t].hconduct>(rand()%250))
{
if (aheat_enable)
{
if (hv[y/CELL][x/CELL] < parts[i].temp)
{
hv[y/CELL][x/CELL] = hv[y/CELL][x/CELL] + parts[i].temp*0.04;
parts[i].temp = parts[i].temp - hv[y/CELL][x/CELL]*0.04;
}
else
{
hv[y/CELL][x/CELL] = hv[y/CELL][x/CELL] - parts[i].temp*0.04;
parts[i].temp = parts[i].temp + hv[y/CELL][x/CELL]*0.04;
}
c_heat = (hv[y/CELL][x/CELL]-parts[i].temp)*0.04;
parts[i].temp += c_heat;
hv[y/CELL][x/CELL] -= c_heat;
}
c_heat = 0.0f;
for (j=0; j<8; j++)
{
surround_hconduct[j] = i;