Gas‐liquid‐fiber flow in a cocurrent bubble column

Effect of fiber type on gas holdup in a cocurrent air–water–fiber bubble column

“…The overall column gas holdup is defined as ε = (ε 1 + ε 2 + ε 3 )/3, the average gas holdup in the three lower sections. The gas holdup in the top section is not included in the overall gas holdup because of measurement error due to the void caused by large bubbles escaping the column top, which is significant during some experimental conditions [24]. Measurement uncertainties are estimated following the method provided by Figliola and Beasley [30] and details can be found in Tang [29].…”

“…This paper focuses on fiber effects in gas-liquid-fiber slurries and extends the work of Tang and Heindel [23,24]. The effects of fiber type on gas holdup in a cocurrent air-waterfiber bubble column are investigated experimentally using three types of cellulose fibers (i.e., hardwood, softwood, and bleached chemithermomechanical pulp (BCTMP)) and Rayon fiber of three different lengths.…”

“…Bubble size distribution in gas-liquid-fiber flows and its variation with fiber mass fraction and fiber type have been investigated in semi-batch [13][14][15] and cocurrent bubble columns [16]. Gas holdup in gas-liquid-fiber systems has also been studied in both semi-batch [5,[17][18][19][20][21][22] and cocurrent [5,10,11,23,24] bubble columns. Effects of superficial gas and liquid velocity, fiber mass fraction, and gas distribution method on gas holdup were studied in these investigations.…”

Similitude Analysis for Gas-Liquid-Fiber Flows in Cocurrent Bubble Columns

“…The overall column gas holdup is defined ass= (s 1 + E2 + e 3 )/3, the average gas holdup in the three lower sections. The gas holdup in the top section is not included in the overall gas holdup because of measurement error due to the void caused by large bubbles escaping the column top, which is significant during some experimental conditions [21]. Measurement uncertainties are estimated following the method provided by Figliola and Beasley [75] and details are presented by Tang [71].…”

“…Bubble size distribution in gas-liquid-fiber flows and its variation with fiber mass fraction and fiber type have been investigated in semi-batch [8-1 0] and cocurrent bubble columns [11 ]. Gas holdup in gas-liquid-fiber systems has also been studied in both semi-batch [2,[12][13][14][15][16][17][18] and co current [2,[19][20][21][22][23] bubble columns. Effects of superficial gas and liquid velocity, fiber mass fraction, fiber type, and gas ·Corresponding author, Phone: 515-294-0057, Fax: 515-294-3261, Email: theindel@iastate.edu distribution method on gas holdup were studied in these investigations.…”