Double diffusive convection between two parallel plates with different boundary conditions etc15 Tracking Number 279Presentation: Session: Geophysical and astrophysical turbulence 2 Room: Room C Session start: 15:00 Thu 27 Aug 2015 Yantao Yang yantao.yang@utwente.nl Affifliation: Erwin P. van der Poel e.p.vanderpoel@utwente.nl Affifliation: Rodolfo Ostilla-Monico r.ostillamonico@utwente.nl Affifliation: Chao Sun c.sun@utwente.nl Affifliation: Roberto Verzicco verzicco@uniroma2.it Affifliation: Siegfried Grossmann grossmann@physik.uni-marburg.de Affifliation: Detlef Lohse d.lohse@utwente.nl Affifliation: Topics: - Geophysical and astrophysical turbulence, - Thermally driven turbulence Abstract: We investigate the double diffusive convection between two parallel plates with either no-slip or free-slip boundary conditions. Direct numerical simulations have been conducted systematically for a series of control parameters. Salt fingers can be observed for both boundary conditions and all parameters explored. Compared to the no-slip case, salt fingers are stronger in the free-slip case, which is accompanied by larger salinity flux and flow velocity. For both boundary conditions, thin boundary regions develop adjacent to two plates. The salinity flux and the Reynolds number show similar dependences on the control parameter, namely, the Rayleigh number of the salinity field. |