Physical modelling and similitude of air bubble entrainment at vertical circular plunging jets
When a plunging jet impinges into a pool of liquid, air bubble entrainment takes place if the inflow velocity exceeds a threshold velocity. This study investigates air entrainment and bubble dispersion in the developing flow region of vertical circular plunging jets. Three scale models were used and...
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| Veröffentlicht in: | Chemical engineering science 2004-03, Vol.59 (4), p.747-758 |
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| creator | Chanson, H. Aoki, S. Hoque, A. |
| description | When a plunging jet impinges into a pool of liquid, air bubble entrainment takes place if the inflow velocity exceeds a threshold velocity. This study investigates air entrainment and bubble dispersion in the developing flow region of vertical circular plunging jets. Three scale models were used and detailed air–water measurements (void fraction, bubble count rate, bubble sizes) were performed systematically for identical inflow Froude numbers. The results highlight that the modelling of plunging jet based upon a Froude similitude is affected by significant scale effects when the approach flow conditions satisfied
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| doi_str_mv | 10.1016/j.ces.2003.11.016 |
| format | Article |
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We
1<1
E+3, while some lesser scale effect was noticed for
V
1/
u
r
<10 and
We
1>1
E+3. Bubble chord time measurements showed pseudo-chord sizes of entrained bubbles ranging from less than
0.5
mm
to more than
10
mm
with an average pseudo-chord size were between 4 and
9
mm
. However, bubble size data could not be scaled properly.</description><identifier>ISSN: 0009-2509</identifier><identifier>EISSN: 1873-4405</identifier><identifier>DOI: 10.1016/j.ces.2003.11.016</identifier><identifier>CODEN: CESCAC</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Air bubble entrainment ; Applied sciences ; Chemical engineering ; Circular plunging ; Developing shear flow ; Exact sciences and technology ; Miscellaneous ; Physical modelling ; Similitude</subject><ispartof>Chemical engineering science, 2004-03, Vol.59 (4), p.747-758</ispartof><rights>2003 Elsevier Ltd</rights><rights>2004 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c356t-b6b61a32037cc5bfc0e2bd4173ee0e360e5378003426e57fea1011172ba8f57d3</citedby><cites>FETCH-LOGICAL-c356t-b6b61a32037cc5bfc0e2bd4173ee0e360e5378003426e57fea1011172ba8f57d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.ces.2003.11.016$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,778,782,3539,27911,27912,45982</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15558687$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Chanson, H.</creatorcontrib><creatorcontrib>Aoki, S.</creatorcontrib><creatorcontrib>Hoque, A.</creatorcontrib><title>Physical modelling and similitude of air bubble entrainment at vertical circular plunging jets</title><title>Chemical engineering science</title><description>When a plunging jet impinges into a pool of liquid, air bubble entrainment takes place if the inflow velocity exceeds a threshold velocity. This study investigates air entrainment and bubble dispersion in the developing flow region of vertical circular plunging jets. Three scale models were used and detailed air–water measurements (void fraction, bubble count rate, bubble sizes) were performed systematically for identical inflow Froude numbers. The results highlight that the modelling of plunging jet based upon a Froude similitude is affected by significant scale effects when the approach flow conditions satisfied
We
1<1
E+3, while some lesser scale effect was noticed for
V
1/
u
r
<10 and
We
1>1
E+3. Bubble chord time measurements showed pseudo-chord sizes of entrained bubbles ranging from less than
0.5
mm
to more than
10
mm
with an average pseudo-chord size were between 4 and
9
mm
. However, bubble size data could not be scaled properly.</description><subject>Air bubble entrainment</subject><subject>Applied sciences</subject><subject>Chemical engineering</subject><subject>Circular plunging</subject><subject>Developing shear flow</subject><subject>Exact sciences and technology</subject><subject>Miscellaneous</subject><subject>Physical modelling</subject><subject>Similitude</subject><issn>0009-2509</issn><issn>1873-4405</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNp9kE9LxDAQxYMouK5-AG-56K01aZqmiydZ_AcLetCrIUmna0rarkm6sN_erCt48zTM8N4bfg-hS0pySmh10-UGQl4QwnJK83Q5QjNaC5aVJeHHaEYIWWQFJ4tTdBZCl1YhKJmhj9fPXbBGOdyPDThnhzVWQ4OD7a2zcWoAjy1W1mM9ae0AwxC9skOfJlYRb8HHH7ux3kxOebxx07Dex3QQwzk6aZULcPE75-j94f5t-ZStXh6fl3erzDBexUxXuqKKFYQJY7huDYFCNyUVDIAAqwhwJuoEVxYVcNGCStCUikKruuWiYXN0fcjd-PFrghBlb4NJPGqAcQqyqBlZlOUiCelBaPwYgodWbrztld9JSuS-SdnJ1KTcNykplemSPFe_4Sok1NarwdjwZ-Sc11Xqeo5uDzpIpFsLXgZjYTDQWA8myma0_3z5BmYjiYI</recordid><startdate>20040301</startdate><enddate>20040301</enddate><creator>Chanson, H.</creator><creator>Aoki, S.</creator><creator>Hoque, A.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>20040301</creationdate><title>Physical modelling and similitude of air bubble entrainment at vertical circular plunging jets</title><author>Chanson, H. ; Aoki, S. ; Hoque, A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c356t-b6b61a32037cc5bfc0e2bd4173ee0e360e5378003426e57fea1011172ba8f57d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Air bubble entrainment</topic><topic>Applied sciences</topic><topic>Chemical engineering</topic><topic>Circular plunging</topic><topic>Developing shear flow</topic><topic>Exact sciences and technology</topic><topic>Miscellaneous</topic><topic>Physical modelling</topic><topic>Similitude</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chanson, H.</creatorcontrib><creatorcontrib>Aoki, S.</creatorcontrib><creatorcontrib>Hoque, A.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>Chemical engineering science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chanson, H.</au><au>Aoki, S.</au><au>Hoque, A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Physical modelling and similitude of air bubble entrainment at vertical circular plunging jets</atitle><jtitle>Chemical engineering science</jtitle><date>2004-03-01</date><risdate>2004</risdate><volume>59</volume><issue>4</issue><spage>747</spage><epage>758</epage><pages>747-758</pages><issn>0009-2509</issn><eissn>1873-4405</eissn><coden>CESCAC</coden><abstract>When a plunging jet impinges into a pool of liquid, air bubble entrainment takes place if the inflow velocity exceeds a threshold velocity. This study investigates air entrainment and bubble dispersion in the developing flow region of vertical circular plunging jets. Three scale models were used and detailed air–water measurements (void fraction, bubble count rate, bubble sizes) were performed systematically for identical inflow Froude numbers. The results highlight that the modelling of plunging jet based upon a Froude similitude is affected by significant scale effects when the approach flow conditions satisfied
We
1<1
E+3, while some lesser scale effect was noticed for
V
1/
u
r
<10 and
We
1>1
E+3. Bubble chord time measurements showed pseudo-chord sizes of entrained bubbles ranging from less than
0.5
mm
to more than
10
mm
with an average pseudo-chord size were between 4 and
9
mm
. However, bubble size data could not be scaled properly.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ces.2003.11.016</doi><tpages>12</tpages></addata></record> |
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| ispartof | Chemical engineering science, 2004-03, Vol.59 (4), p.747-758 |
| issn | 0009-2509 1873-4405 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete - AutoHoldings |
| subjects | Air bubble entrainment Applied sciences Chemical engineering Circular plunging Developing shear flow Exact sciences and technology Miscellaneous Physical modelling Similitude |
| title | Physical modelling and similitude of air bubble entrainment at vertical circular plunging jets |
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