ARTICLE:

• SMC modelling of relaminarizing pipe flow subjected to strong heating  download article

R. Jester-Zurker
Department of Mechanical Engineering, Darmstadt University of Technology, Petersenstr. 30, D-64287, Germany

S. Jakirlic
Department of Mechanical Engineering, Darmstadt University of Technology, Petersenstr. 30, D-64287, Germany

Kemo Hanjalic
Department of Multi Scale Physics, Faculty of Applied Sciences, Delft University of Technology, The Netherlands. Present affiliation: Marie Curie Chair, DMA, University of Rome "La Sapienza", Roma, Italy

ABSTRACT

The paper deals with the computational modelling of a flow in a circular pipe subjected to large temperature gradients. Three flow configurations differing in terms of heat flux intensity were examined. Reference experiments were performed by Shehata and McEligot (1998). Strong flow properties variation manifested through density reduction and viscosity increase led to the thermal boundary layer growth and viscous sublayer thickening relative to the boundary layer thickness reduction. In the most severe case with heating rate q_i⁺ = 0.0045, investigated also by means of DNS by Satake et al. (2000), the flow laminarization occurred. A near-wall second-moment closure model based on the homogeneous dissipation concept (Jakirlic and Hanjalic, 2002) was used in conjunction with the scalar transport model of Seki et al. (2003). The results obtained follow closely the experimental findings.

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217-220 pages

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