Effects of Diameters on Countercurrent Flow Limitation at a Square Top End in Vertical Pipes

Table 1

Experimental conditions (D, diameter; h, water level; our judgement of the condition).

Reference	Top end	D [mm]	h [mm]
Wallis and Kuo [11]	Protruding	6.4, 19, 31.2, 38.2,	< 7
		63.5, 113, 145
Bharathan et al. [12]	Protruding	19, 148, 250	Mid-level
	Square	19, 25, 51, 148
Richter [9]	(Protruding)	19, 25, 32, 38, 44, 51,	(< 7)
		64, 76, 89, 100, 140
Matsumura and	Square	12, 20	50, 100, 200
Kaminaga [13]
Doi et al. [10]	Square	30, 45, 60 (UT1)	200
		30, 45, 60 (UT2)	200
		30 (UT3)	100, 200, 300, 450, 600