Number of particles 1000 DeltaT 0.0020 Nu 1.0E-6 Velocity scale 5.0E-5 Length scale 0.0010 Initial velocity X 0.0 Initial velocity Y 0.0 Density variation 0.03 Mach number 0.1 Body force X 5.0E-7 Body force Y 0.0 Initial density 1000.0 Output every 5000 Container width / height 0.15 Cylinder 0.075, 0.075 radius = 0.02 Box 0, 0 width=0.15 height=0.025 Box 0, 0.125 width=0.15 height=0.025