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Keywords: Bubble column
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Proceedings Papers

Proc. ASME. FEDSM2007, Volume 1: Symposia, Parts A and B, 453-461, July 30–August 2, 2007
Paper No: FEDSM2007-37031
... 26 03 2009 Bubble column reactors are used for several processes in the chemical industry, e.g. hydrogenation or oxidation reactions. At the bottom of the reactor a gaseous phase is dispersed into a continuous liquid phase with suspended particles. The resulting bubble swarm induces...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 3, 507-515, July 11–15, 2004
Paper No: HT-FED2004-56222
... at which ly heterogeneous flow is observed is lower when A = %. words: Bubble column; Drift flux; Gas holdup; Gas ibutor; Fiber suspension; Flow regime. MENCLATURE open area, % fiber mass fraction, % orifice diameter, mm column height, m fiber length, mm dry fiber mass, kg total mass of fiber-water mixture...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 3, 497-505, July 11–15, 2004
Paper No: HT-FED2004-56220
... 03 03 2009 Effects of superficial liquid velocity ( U l ), superficial gas velocity ( U g ), and fiber mass fraction ( C ) on gas holdup ( ε ) and flow regime transition are studied experimentally in well-mixed water-cellulose fiber suspensions in a cocurrent bubble column...
Proceedings Papers

Proc. ASME. FEDSM2005, Volume 1: Symposia, Parts A and B, 43-48, June 19–23, 2005
Paper No: FEDSM2005-77043
... 14 10 2008 Three different cellulose fiber types are used to study their effect on gas holdup and flow regime transition in a 10.2 cm semi-batch bubble column. The three natural fiber types include bleached softwood chemical pulp (softwood), bleached hardwood chemical pulp (hardwood...
Proceedings Papers

Proc. ASME. FEDSM2006, Volume 1: Symposia, Parts A and B, 1799-1805, July 17–20, 2006
Paper No: FEDSM2006-98142
... 08 09 2008 For measuring local phase fractions in 2- and 3-phase bubble columns, an X-ray tomographic measurement system is applied. This measurement technique, also referred to as Computer Tomography or CT, is based on the attenuation of X-rays along their path through the bubble...
Topics: Bubbles, X-rays
Proceedings Papers

Proc. ASME. FEDSM2006, Volume 2: Fora, 55-60, July 17–20, 2006
Paper No: FEDSM2006-98178
... prediction of heterogeneous bubbly flows. Hence we implemented several bubble coalescence and breakup models into the (N+2) field model, which is a hybrid combination of an interface tracking method and a multi-fluid model. Void and bubble size distributions in an open rectangular bubble column were measured...