Connecting flow structures and heat flux in turbulent Rayleigh-Bénard convection

Details Connecting flow structures and heat flux in turbulent Rayleigh-Bénard convection Connecting flow structures and heat flux in turbulent Rayleigh-Bénard convection

2011-09-30

arxiv.org/abs/1109.6865v1

Phys. Rev. E 84, 045303(R) (2011)

Physics

Fluid Dynamics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevE.84.045303

The aspect ratio (\Gamma) dependence of the heat transfer (Nusselt number Nu in dimensionless form) in turbulent (two-dimensional) Rayleigh-B\'enard convection is numerically studied in the regime $0.4 \le \Gamma \le 1.25$ for Rayleigh numbers $10^7 \le Ra \le Ra^{9}$ and Prandtl numbers Pr =0.7 (gas) and 4.3 (water). Nu (\Gamma) shows a very rich structure with sudden jumps and sharp transitions. We connect these structures to the way the flow organizes itself in the sample and explain why the aspect ratio dependence of Nu is more pronounced for small Pr. Even for fixed \Gamma different turbulent states (with different resulting Nu) can exist, between which the flow can or cannot switch. In the latter case the heat transfer thus depends on the initial conditions.

Affiliated with

Also associated with

No associations

Rating

Connecting flow structures and heat flux in turbulent Rayleigh-Bénard convection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Connecting flow structures and heat flux in turbulent Rayleigh-Bénard convection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Connecting flow structures and heat flux in turbulent Rayleigh-Bénard convection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-669634