The data presented in this work also confirm the complex role of roughness, in that it can increase or decrease the air entrainment speed depending on the value on the viscosity of the coating solution.
The smoke mass transport along the tunnel for different conditions is analyzed, and results show that for a certain HRR, the smoke mass flow rate decreases with reduced ambient pressure due to the decreased air density and the weakening of air entrainment strength.
RHA also affected air entrainment and decreased the unit weight of concrete.
Overall, the trends observed in diesel fuel jet soot closely correlate with the cross-sectional average equivalence ratio at the lift-off length, with soot levels decreasing as the equivalence ratio decreases (i.e., as more air entrainment and mixing of fuel and air occur upstream of the lift-off length).
Unless the dangerous air entrainment is eliminated, air entraining causes mechanical damage, vibration in pipelines and loss of pump performance.
When the cloud moves horizontally at a height of 6 8 km, the mass fraction of the ejected material decreases to <0.05 because of air entrainment (Fig. 2(h)).
Early in 1953 the experiments by Peterka proved that air entrainment has effects on decreasing cavitation damage.
However, the thunderstorm activity decreased markedly on September 6, primarily from dry air entrainment, and it weakened to tropical depression status for the last time.
Buoyancy is reached because of the strong decrease of density of the hot gas-particle mixture, which is caused by the drastic decrease of particle volumetric concentration upon the combined effects of gas expansion by decompression and air entrainment.
By early on September 24, the winds had decreased to 80 mph (130 km/h); its convection weakened in intensity, and the eyewall eroded due to dry air entrainment.
