Effect of Gas Distributor on Gas Holdup in Fiber Suspensions

dc.contributor.author Su, Xufeng
dc.contributor.author Heindel, Theodore
dc.contributor.author Heindel, Theodore
dc.contributor.department Mechanical Engineering
dc.date 2019-07-18T06:30:13.000
dc.date.accessioned 2020-06-30T06:01:43Z
dc.date.available 2020-06-30T06:01:43Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2004
dc.date.embargo 2014-11-19
dc.date.issued 2004-07-01
dc.description.abstract <p>Two different aeration plates are used to study their effect on gas holdup and flow regime transition in fiber suspensions. Two gas distributors with different open areas (A = 0.57% and 2.14%) and the same orifice diameter (do = 1 mm) are used, and experiments are performed using three different Rayon fiber lengths (L = 3, 6, and 12 mm) over a range of superficial gas velocities (Ug ≤ 18 cm/s) and a range of fiber mass fractions (0 ≤ C ≤ 1.8%) in a 15.24 cm diameter semi-batch bubble column. Experimental results show that the distributor with A = 2.14% tends to produce lower gas holdup than the one with A = 0.57% for both air-water systems and fiber slurries. However, the effect of distributor open area on gas holdup diminishes at high fiber mass fractions (C ≤ 1.2%). Both distributors generate homogeneous, transitional, and heterogeneous flow regimes over the range of superficial gas velocities for air-water and low fiber mass fraction suspensions. However, the distributor with A = 2.14% enhances the flow regime transition, i.e., the superficial gas velocity at which the transitional flow regime appears is lower. Additionally, the fiber mass fraction at which purely heterogeneous flow is observed is lower when A = 2.14%.</p>
dc.description.comments <p>This is a conference proceeding from <em>ASME 2004 Heat Transfer/Fluids Engineering Summer Conference </em>3 (2004): 507, <a href="http://dx.doi.org/10.1115/HT-FED2004-56222" target="_blank">doi:10.1115/HT-FED2004-56222</a>. Posted with permission.</p>
dc.identifier archive/lib.dr.iastate.edu/me_conf/138/
dc.identifier.articleid 1143
dc.identifier.contextkey 6374120
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath me_conf/138
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/54781
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/me_conf/138/2004_Heindel_EffectGas.pdf|||Fri Jan 14 20:01:09 UTC 2022
dc.source.uri 10.1115/HT-FED2004-56222
dc.subject.disciplines Acoustics, Dynamics, and Controls
dc.subject.disciplines Fluid Dynamics
dc.subject.disciplines Polymer and Organic Materials
dc.subject.keywords bubble column
dc.subject.keywords drift flux
dc.subject.keywords gas holdup
dc.subject.keywords gas distributor
dc.subject.keywords fiber suspension
dc.subject.keywords flow regime
dc.title Effect of Gas Distributor on Gas Holdup in Fiber Suspensions
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication f918da1b-aa02-4c95-91a3-b6617c83b07b
relation.isOrgUnitOfPublication 6d38ab0f-8cc2-4ad3-90b1-67a60c5a6f59
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