1. Rayleigh-Benard convection Rayleigh Number Nusselt Number total heat flux conductive heat flux

2. Turbulent Convection Experimental set up d = 20 cm Lx =40 cm Ly = 10 cm Temperature profiles Nu versus Ra

3. Heat transport in turbulent convection When the system is turbulent: probe

4. Variable employed for the test

5. PDF of temperature at Ra=10 10

6. Deviation from a Gaussian as a function of 

7. PDF of temperature at Ra=10 10 We select an interval around zero and we compute

8. with We find:        Therefore the temperature PDF verifies for -0.5<Y<0.5

9. A good rescaling of the PDF is obatined for all values of  Scaling Function We modify the Sinai scaling function in the following way: