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@PHDTHESIS{alSibai:59863,
      author       = {al-Sibai, Faruk},
      othercontributors = {Renz, Ulrich},
      title        = {{E}xperimentelle {U}ntersuchung der
                      {S}trömungscharakteristik und des {W}ärmeübergangs bei
                      welligen {R}ieselfilmen},
      address      = {Aachen},
      publisher    = {Publikationsserver der RWTH Aachen University},
      reportid     = {RWTH-CONV-121608},
      pages        = {VI, 100 S. : Ill., graph. Darst.},
      year         = {2004},
      note         = {Prüfungsjahr: 2004. - Publikationsjahr: 2005; Aachen,
                      Techn. Hochsch., Diss., 2004},
      abstract     = {In the present work experimental investigations of the flow
                      characteristic and heat transport of wavy silicone oil films
                      were accomplished with different angles of inclination
                      (13°, 30°, 60° and 90°) and Kapitza numbers, which allow
                      a deeper view into the structure and the heat transport
                      phenomena. From the experimental results of laminar-wavy and
                      turbulent films dimensionless approximation equations for
                      different parameters were determined for the description of
                      the film flow like the film thickness, wave frequency and
                      the wave velocity. Furthermore new boundaries for the
                      different film regimes could be discriminated from the
                      results. A substantial part of the work was the development
                      of more suitable temporally and locally high resolving
                      measurement techniques. Thus a measurement technique on the
                      basis of the fluorescence intensity method was developed,
                      which is able to determine simultaneously the film thickness
                      and the wave velocity. A further component of the work was
                      the measurement of the film velocity of periodically excited
                      two-dimensional-wavy films with the Particle Image
                      Velocimetry PIV. The velocity field of a complete length of
                      a two-dimensional wave could be reconstructed by
                      simultaneous film thickness measurements. By measurements of
                      the wall temperature distribution with a developed measuring
                      system on the basis of the infrared thermography the
                      influence of the wavy surface on the heat transfer within
                      the laminar-wavy flow range could be examined. The results
                      of the flow characteristic investigations of wavy film flow
                      are valuable contributions to understand the influence of
                      the waves on hydrodynamics and heat-transport.},
      keywords     = {Rieselfilm (SWD) / Filmströmung (SWD) / Wellenströmung
                      (SWD) / Strömungsmesstechnik (SWD) / Wärmeübergang (SWD)
                      / Infrarotthermographie (SWD)},
      cin          = {400000 / 412610},
      ddc          = {620},
      cid          = {$I:(DE-82)400000_20140620$ / $I:(DE-82)412610_20140620$},
      typ          = {PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:hbz:82-20050535},
      doi          = {10.18154/RWTH-CONV-121608},
      url          = {https://publications.rwth-aachen.de/record/59863},
}