Prandtl and Rayleigh numbers dependences in Rayleigh-Bénard convection P.-E. Roche, B. Castaing, B. Chabaud and B. Hébral Europhys. Lett., 58 5 (2002) 693-698 Published online: 01 May 2002 DOI: 10.1209/epl/i2002-00405-1