Problems of Astrophysical Turbulent Convection: Thermal convection in a layer without boundaries [PDF]
in Procs 2010 CTR Summer Program, P. Moin (ed.), pp. 475-484,
Stanford University, 2010, 2011 Thermal convection in fluid layers heated from below are usually realized experimentally as well as treated theoretically with fixed boundaries on which conditions for the temperature and the velocity field are prescribed. The thermal and velocity boundary layers attached to the upper and lower boundaries determine to a large extent the properties of ...
arxiv
Topology optimisation for natural convection problems [PDF]
International Journal for Numerical Methods in Fluids, 2014 SummaryThis paper demonstrates the application of the density‐based topology optimisation approach for the design of heat sinks and micropumps based on natural convection effects. The problems are modelled under the assumptions of steady‐state laminar flow using the incompressible Navier–Stokes equations coupled to the convection‐diffusion equation ...
Joe Alexandersen +3 more
openaire +4 more sources
Numerical Analysis of Turbulent Mixed Convection in Vertical Annular Channel
Yuanzineng kexue jishu, 2023 Reactor cavity cooling system (RCCS) is a competitive residual heat removal scheme for small modular reactors. In this paper, the RCCS has been simplified to a scenario that ascending air flow is got heated in vertical annular channels and driven by ...
HU Xiangjie;WEN Jiming;GAO Puzhen;TIAN Ruifeng
doaj
Heat transfer enhancement and reduction by poylmer additives in turbulent Rayleigh Benard convection [PDF]
arXiv, 2010 This letter confirms the existence of heat transfer enhancement (HTE) and reduction (HTR) in turbulent natural convection with polymer additives. HTE and HTR were numerically predicted by Benzi et al.(PRL, 104, 024502, 2010) in homogenous turbulent convection, but experiments by Ahlers & Nikolaenko(PRL, 104, 034503, 2010) in turbulent natural ...
arxiv
The influence of nanofluid PH on natural convection [PDF]
, 2016 The vast majority of experimental studies of nanofluids under natural convection have shown that the heat transfer rate decreases in contrast to observations of increased heat transfer rate for forced convection and boiling heat transfer. This surprising
Hardalupas, I, Kouloulias, K, Sergis, A
core
Discussion: “Integral Methods in Natural-Convection Flow” (Levy, Salomon, 1955, ASME J. Appl. Mech., 22, pp. 515–522) [PDF]
, 1956 Carl Wagner
openalex +3 more sources
Role of natural convection in the dissolution of sessile droplets [PDF]
, 2016 The dissolution process of small (initial (equivalent) radius $R_0 < 1$ mm) long-chain alcohol (of various types) sessile droplets in water is studied, disentangling diffusive and convective contributions. The latter can arise for high solubilities of the alcohol, as the density of the alcohol-water mixture is then considerably less as that of pure ...
arxiv +1 more source
Thermal modeling of phase change solidification in thermal control devices including natural convection effects [PDF]
Natural convection effects in phase change thermal control devices were studied. A mathematical model was developed to evaluate natural convection effects in a phase change test cell undergoing solidification.
Golden, J. O. +2 more
core +1 more source
Tikrit Journal of Engineering Sciences, 2007 A theoretical and experimental study on the transient natural convection heat transfer across an eccentric horizontal annulus under the condition of constant surface temperature was carried out. The numerical study was carried out using the computational
Omer Khalil Ahmad
doaj +1 more source
Effects of Slotted Structures on Nonlinear Characteristics of Natural Convection in a Cylinder with an Internal Concentric Slotted Annulus [PDF]
arXiv, 2016 Natural convection in a cylinder with an internally slotted annulus was solved by SIMPLE algorithm, and the effects of different slotted structures on nonlinear characteristics of natural convection were investigated. The results show that the equivalent thermal conductivity Keq increases with Rayleigh number, and reaches the maximum in the vertical ...
arxiv