Influence of a strong density stratification on the entrainment of a turbulent axisymmetric plume

✍ Scribed by L. Dehmani; D. -K. Son; L. Gbahoué; F. X. Rongère

• Book ID: 104657678
• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 939 KB
• Volume: 21
• Category: Article
• ISSN: 0723-4864
• DOI: 10.1007/bf00191688

✦ Synopsis

The effect of entrainment and the role of the N * interface during the interaction between an axisymmetric Q turbulent mass plume and a strong stratified layer are in-r vestigated. We describe mainly the characteristics of the plume: the change in the profiles of the density, the horizontal rl component of the velocity and the corresponding intensity of turbulence, the change in the entrainment co-efficient, when r'~ the plume goes through the impingement interface, assuming Re a self-similar Gaussian property of the axial velocity compon-Ri ent and of the density difference. The influence of the u stratification on the plume angle coefficient is studied, and U compared with the results related to a homogeneous environv ment, obtained elsewhere. Experimental correlation on the x mean entrainment coefficient in a given plume cross-section, is xv formulated. X :~= d X ~ List of symbols B specific buoyancy flux at the source ( = gQ (Pai~--p.o)IpH~) d diameter of the source