Flow structure and optical beam propagation in high-Reynolds-number gas-phase shear layers and jets
We report on the structure of the scalar index-of-refraction field generated by turbulent, gas-phase, incompressible and compressible shear layers and incompressible jets, and on associated beam-propagation aero-optical phenomena. Using simultaneous imaging of the optical-beam distortion and the tur...
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| Veröffentlicht in: | Journal of fluid mechanics 2001-04, Vol.433, p.105-134 |
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| container_title | Journal of fluid mechanics |
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| creator | DIMOTAKIS, P. E. CATRAKIS, H. J. FOURGUETTE, D. C. |
| description | We report on the structure of the scalar index-of-refraction field generated by turbulent,
gas-phase, incompressible and compressible shear layers and incompressible
jets, and on associated beam-propagation aero-optical phenomena. Using simultaneous
imaging of the optical-beam distortion and the turbulent-flow index-of-refraction field,
wavefront-phase functions were computed for optical beams emerging
from the turbulent region in these free-shear flows, in an aero-optical regime producing
weak wavefront distortions. Spatial wavefront-phase behaviour is found to be
dominated by the large-scale structure of these flows. A simple level-set representation
of the index-of-refraction field in high-Reynolds-number, incompressible shear layers
is found to provide a good representation of observed wavefront-phase behaviour,
indicating that the structure of the unsteady outer boundaries of the turbulent region
provides the dominant contributions. |
| doi_str_mv | 10.1017/S0022112000003281 |
| format | Article |
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gas-phase, incompressible and compressible shear layers and incompressible
jets, and on associated beam-propagation aero-optical phenomena. Using simultaneous
imaging of the optical-beam distortion and the turbulent-flow index-of-refraction field,
wavefront-phase functions were computed for optical beams emerging
from the turbulent region in these free-shear flows, in an aero-optical regime producing
weak wavefront distortions. Spatial wavefront-phase behaviour is found to be
dominated by the large-scale structure of these flows. A simple level-set representation
of the index-of-refraction field in high-Reynolds-number, incompressible shear layers
is found to provide a good representation of observed wavefront-phase behaviour,
indicating that the structure of the unsteady outer boundaries of the turbulent region
provides the dominant contributions.</description><identifier>ISSN: 0022-1120</identifier><identifier>EISSN: 1469-7645</identifier><identifier>DOI: 10.1017/S0022112000003281</identifier><identifier>CODEN: JFLSA7</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Exact sciences and technology ; Flow index ; Fluid dynamics ; Fluid mechanics ; Fundamental areas of phenomenology (including applications) ; High-reynolds-number turbulence ; Instrumentation for fluid dynamics ; Jets ; Physics ; Turbulent flows, convection, and heat transfer</subject><ispartof>Journal of fluid mechanics, 2001-04, Vol.433, p.105-134</ispartof><rights>2001 Cambridge University Press</rights><rights>2001 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c423t-b8d510d49da4bdc53e4eb13650a8095a322afc266a2cd96b2ed599ae65b018e33</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.cambridge.org/core/product/identifier/S0022112000003281/type/journal_article$$EHTML$$P50$$Gcambridge$$H</linktohtml><link.rule.ids>164,314,780,784,27924,27925,55628</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=938422$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>DIMOTAKIS, P. E.</creatorcontrib><creatorcontrib>CATRAKIS, H. J.</creatorcontrib><creatorcontrib>FOURGUETTE, D. C.</creatorcontrib><title>Flow structure and optical beam propagation in high-Reynolds-number gas-phase shear layers and jets</title><title>Journal of fluid mechanics</title><addtitle>J. Fluid Mech</addtitle><description>We report on the structure of the scalar index-of-refraction field generated by turbulent,
gas-phase, incompressible and compressible shear layers and incompressible
jets, and on associated beam-propagation aero-optical phenomena. Using simultaneous
imaging of the optical-beam distortion and the turbulent-flow index-of-refraction field,
wavefront-phase functions were computed for optical beams emerging
from the turbulent region in these free-shear flows, in an aero-optical regime producing
weak wavefront distortions. Spatial wavefront-phase behaviour is found to be
dominated by the large-scale structure of these flows. A simple level-set representation
of the index-of-refraction field in high-Reynolds-number, incompressible shear layers
is found to provide a good representation of observed wavefront-phase behaviour,
indicating that the structure of the unsteady outer boundaries of the turbulent region
provides the dominant contributions.</description><subject>Exact sciences and technology</subject><subject>Flow index</subject><subject>Fluid dynamics</subject><subject>Fluid mechanics</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>High-reynolds-number turbulence</subject><subject>Instrumentation for fluid dynamics</subject><subject>Jets</subject><subject>Physics</subject><subject>Turbulent flows, convection, and heat transfer</subject><issn>0022-1120</issn><issn>1469-7645</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp1kE9P20AQxVeolUgpH4DbCs4L-9_2EaESkCKgbcp1Nd6dJA6O7e7aovn2OCSih6pzmcP7zZunR8iZ4JeCi-zqJ-dSCiH5bpTMxRGZCG0LllltPpHJTmY7_Zh8SWnNuVC8yCbE39btK019HHw_RKTQBNp2feWhpiXChnax7WAJfdU2tGroqlqu2A_cNm0dEmuGTYmRLiGxbgUJaVohRFrDFmN691pjn76SzwuoE54e9gn5dfttfnPHZo_T-5vrGfNaqp6VeTCCB10E0GXwRqHGUihrOOS8MKCkhIWX1oL0obClxGCKAtCakosclToh53vfMfPvAVPv1u0Qm_Glk4LnmdFcj5DYQz62KUVcuC5WG4hbJ7jbVen-qXK8uTgYQxqLWURofJU-DguVaylHiu2pKvX450OF-OJspjLj7PS7m-dP83w2fXYPI68OSWBTxios8W_e_2d5A_aXkXo</recordid><startdate>20010425</startdate><enddate>20010425</enddate><creator>DIMOTAKIS, P. 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E.</au><au>CATRAKIS, H. J.</au><au>FOURGUETTE, D. C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Flow structure and optical beam propagation in high-Reynolds-number gas-phase shear layers and jets</atitle><jtitle>Journal of fluid mechanics</jtitle><addtitle>J. Fluid Mech</addtitle><date>2001-04-25</date><risdate>2001</risdate><volume>433</volume><spage>105</spage><epage>134</epage><pages>105-134</pages><issn>0022-1120</issn><eissn>1469-7645</eissn><coden>JFLSA7</coden><abstract>We report on the structure of the scalar index-of-refraction field generated by turbulent,
gas-phase, incompressible and compressible shear layers and incompressible
jets, and on associated beam-propagation aero-optical phenomena. Using simultaneous
imaging of the optical-beam distortion and the turbulent-flow index-of-refraction field,
wavefront-phase functions were computed for optical beams emerging
from the turbulent region in these free-shear flows, in an aero-optical regime producing
weak wavefront distortions. Spatial wavefront-phase behaviour is found to be
dominated by the large-scale structure of these flows. A simple level-set representation
of the index-of-refraction field in high-Reynolds-number, incompressible shear layers
is found to provide a good representation of observed wavefront-phase behaviour,
indicating that the structure of the unsteady outer boundaries of the turbulent region
provides the dominant contributions.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/S0022112000003281</doi><tpages>30</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Exact sciences and technology Flow index Fluid dynamics Fluid mechanics Fundamental areas of phenomenology (including applications) High-reynolds-number turbulence Instrumentation for fluid dynamics Jets Physics Turbulent flows, convection, and heat transfer |
| title | Flow structure and optical beam propagation in high-Reynolds-number gas-phase shear layers and jets |
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