Blar i NTNU Open på forfatter "Andersson, Helge"

Viser treff 1-5 av 5

    • Asymmetric cellular bi-stability in the gap between tandem cylinders 

      Aasland, Tale Egeberg; Pettersen, Bjørnar; Andersson, Helge; Jiang, Fengjian (Peer reviewed; Journal article, 2023)
      In the gap region of tandem cylinders, within the reattachment regime, bi-stability is seen to be cellular. Direct numerical simulations at a Reynolds number of 500, and a gap ratio of 3.0, show that shedding of gap vortices ...

    • Experimental study of turbulent flow with dispersed rod-like particles through optical measurements 

      Abbasi Hoseini, Afshin (Doctoral Theses at NTNU, 1503-8181; 2014:194, Doctoral thesis, 2014)
      The knowledge of the behavior of non-spherical particles suspended in turbulent flows covers a wide range of applications in engineering and science. Dispersed two-phase flows and turbulence are the most challenging subjects ...

    • Flow topology in the gap and wake of convex curved tandem cylinders 

      Aasland, Tale Egeberg; Pettersen, Bjørnar; Andersson, Helge; Jiang, Fengjian (Journal article; Peer reviewed, 2023)
      Flow around curved tandem cylinders in the convex configuration has been studied by means of direct numerical simulations, for a Reynolds number of 500 and a nominal gap ratio of 3.0. Spanwise variation of flow regimes, ...

    • How vortex dynamics affects the structural load in step cylinder flow 

      Tian, Cai; Zhu, Jianxun; Holmedal, Lars Erik; Andersson, Helge; Jiang, Fengjian; Pettersen, Bjørnar (Journal article; Peer reviewed, 2023)
      The vortex dynamics and the structural load in a step cylinder (consisting of a small, d, and a large, D, cylinder) flow are investigated numerically at Reynolds number (ReD) 150 for diameter ratios D/d=2.0,2.4 and 2.8. ...

    • Numerical Studies of Viscous Flow Around Step Cylinders 

      Tian, Cai (Doctoral theses at NTNU;2021:122, Doctoral thesis, 2021)
      A step cylinder consists of a small diameter cylinder (d) attached coaxially to a large diameter cylinder (D). Structures with a similar shape as the step cylinder have been extensively used in many marine engineering ap- ...