---
res:
  bibo_abstract:
  - 'Multiple impinging jets are widely used for their enhanced heat and mass transfer
    characteristics, especially for drying of material such as paper and textiles.
    Efficient transport characteristics between a drying medium and the material being
    dried as well as the jet impingement force acting on the force sensitive products
    (i.e. paper, fabrics) or force sensitive surfaces (i.e. painted, coated) are very
    critical in the industrial drying applications for the overall performance of
    the operation. Many variables and influencing factors and parameters need to be
    considered for the proper design of such multiple impinging jet systems. At present,
    a complete understanding of the effect of all the design and operating parameters
    is lacking. Designers should optimize the design parameters of industrial drying
    equipment to achieve the minimum capital costs (size of the apparatus) and running
    costs (energy consumption). In the framework of this thesis, the heat and mass
    transfer rates and pressure force between the multiple impinging round jets and
    moving surface are investigated numerically. Numerical simulations have been conducted
    to characterize the impinging jet heat and mass transfer and pressure force on
    a moving surface with an array of impinging round jets varying the following parameters:
    jet Reynolds number, nozzle-to-surface distance, jet-to-jet spacing, jet exit
    angle, relative surface curvature and relative surface velocity. Then, the key
    controlling design variables such as the nozzle-to-surface distance and the jet-to-jet
    spacing both normalized by the jet exit diameter (i.e., H/d and S/d), the jet
    exit velocity, the surface velocity and the jet exit angle have been considered
    for a design optimization. Correlations describing the average Nusselt number
    and pressure force coefficient for single row jet configurations impinging on
    the flat and curved surfaces have been developed. The present work illustrates
    that it is possible to address the effects of the complex flow phenomena as encountered
    in industrial drying process using generic CFD codes with good results. Thus complex
    and extensive computations based on elaborate and time consuming turbulence modelling
    (i.e. RSM or LES) may be avoided as well the expensive measurements of jet arrays
    impinging on moving surfaces. Using the correlation equations derived from the
    computations the dependencies for the main parameters over a wide range may be
    easily be determined. The analysis of the flow fields showed many different phenomena
    interacting, leading to different flow regimes. In order to assess these phenomena
    further investigations, preferably based on LES and DNS modelling and flow measurements
    are needed. Keywords: Multiple jets, Heat transfer, Pressure force, Energy consumption,
    Surface motion, Surface curvature, Optimization@eng'
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Ali
      foaf_name: Chitazan, Ali
      foaf_surname: Chitazan
  bibo_doi: ' https://doi.org/10.15488/11879'
  dct_date: 2022^xs_gYear
  dct_language: eng
  dct_publisher: Gottfried Wilhelm Leibniz Universität@
  dct_subject:
  - Prallstrahlen
  - Wärmeübertragung
  - Druckkraft
  - Energieverbrauch
  - Oberflächenbewegung
  - Oberflächenkrümmung
  - Optimierung
  dct_title: Heat and mass transfer from jet impingement flow for drying machines@
...