Studying Disturbance Wave Velocity and Wall Shear Stress of Vertical Upward Annular Flow in Narrow Rectangular Channel

Table 1

Summary of correlations for the disturbance wave velocity.

Reference	Correlation	Remarks
Kumar et al. [2]		Rectangular channel: 6.35 mm × 63.5 mm
		Marmottant and Villermaux [13]		Liquid jet
		Schubring [11]		Air-water
Circular tube:
Al-Sarkhi et al. [14]				Air-water
				Circular tube:
		Berna et al. [4]		Multiple databases used
			Ju et al. [5]			Circular tube:
Lin et al. [8]					Air-water
		Circular tube: