Abstract
Entrainment coefficients of miscible conservative two-dimensional gravity currents traveling downslope, namely, the front of inclined starting plumes and inclined thermals, are investigated in laboratory. Using a large volume of experimental data, the entrainment coefficients of the front of inclined starting plumes and inclined thermals are quantified as functions of bottom slope angles for the slope angles ranging from 5° to 90°. No significant difference in the amount of entrainment coefficients between the two gravity currents is identified. Consequently, an empirical relationship for the entrainment coefficients for inclined gravity currents is proposed as a linear functions of bottom slope angles.
