Oronzio Manca^*, Sergio Nardini, Daniele Ricci

Frontiers in Heat and Mass Transfer, Vol.2, No.1, pp. 1-8, 2011, DOI:10.5098/hmt.v2.1.3007

Abstract Convective heat transfer may be enhanced passively by adopting rough surfaces. Ribs break the laminar sub-layer and create local turbulence in the channel, reducing thermal resistance and enhancing the heat transfer. However, higher losses are expected. In this paper a numerical investigation is carried out on air forced convection in a rectangular ribbed channel. A three-dimensional model is developed to study the effect of the angle between the fluid flow direction and the ribbed surface, provided with rectangular turbulators, in the turbulent flow. Simulations s that Nusselt numbers as well as the pressure drops increase More >

Muhammad M. Rahman^*, Phaninder Injeti

Frontiers in Heat and Mass Transfer, Vol.2, No.1, pp. 1-9, 2011, DOI:10.5098/hmt.v2.1.3003

Abstract This paper presents the effects of protrusions on heat transfer in a microtube and in a two-dimensional microchannel of finite wall thickness. The effects of protrusion shape, size, and number were investigated. Calculations were done for incompressible flow of a Newtonian fluid with developing momentum and thermal boundary layers under uniform and discrete heating conditions. It was found that the local Nusselt number near a protrusion changes significantly with the variations of Reynolds number, height, width, and distance between protrusions, and the distribution of discrete heat sources. The results presented in the paper demonstrate that More >

Hai Trieu Phan^b, Nadia Caney^a,†, Philippe Marty^a, Stéphane Colasson^b, Jérôme Gavillet^b

Frontiers in Heat and Mass Transfer, Vol.2, No.1, pp. 1-6, 2011, DOI:10.5098/hmt.v2.1.3002

Abstract Experiments were performed to study the effects of surface wettability on flow boiling of water at atmospheric pressure. The test channel is a single rectangular channel 0.5 mm high, 5 mm wide and 180 mm long. The mass flux was set at 100 and 120 kg/m² s and the base heat flux was varied from 30 to 80 kW/m². Water enters the test channel under subcooled conditions. The sample surfaces are titanium (Ti) and diamond-like carbon (DLC) surfaces having a contact angle of 49° and 63°, respectively. The experimental results show different flow patterns that impact More >

BIOCELL, Vol.35, Suppl.S, pp. 1-60, 2011

Abstract This article has no abstract. More >

BIOCELL, Vol.35, Suppl.S, pp. 153-190, 2011

Abstract This article has no abstract. More >

BIOCELL, Vol.35, Suppl.S, pp. 93-151, 2011

Abstract This article has no abstract. More >

Mirleau-Thebaud V^1,2, JD Scheiner¹, J Dayde¹

Phyton-International Journal of Experimental Botany, Vol.80, pp. 203-210, 2011, DOI:10.32604/phyton.2011.80.203

Abstract Plant yield and oil content determine sunflower production. Those plant production determinants depend in turn on the plant–environment interaction. In the South West of France, there have been recent advances in soil tillage. To date, 35% of the soil surface dedicated to sunflower is cropped under a reduced tillage system. Major constraints to sunflower cropping are water stress and cryptogamic diseases. The second most important sunflower disease in the South West of France is premature ripening caused by Phoma macdonaldii. Aims of this work were to: 1) understand how these factors influence sunflower yield, and 2) More >

Tshisikhawe MP¹, NM Siaga¹, RB Bhat¹

Phyton-International Journal of Experimental Botany, Vol.80, pp. 127-132, 2011, DOI:10.32604/phyton.2011.80.127

Abstract The population dynamics of Millettia stuhlmannii Taub. was investigated to determine its current structure in Ha- Makhuvha. Plant populations are being utilized only for medicinal purposes under the close supervision of a local headman. It is used in treating stomach aches, as well as protecting homesteads and properties. Given the dependence of many rural communities on plants for medicine, timber, and various other non-timber resources, plant populations experience human pressures. These pressures demand great effort for in situ conservation and associated management needs of medicinal plants. Efforts also apply to sustainable usage and ex situ cultivation practices. The… More >

Masato Yoshino, Yoshito Tanaka, Keisuke Yano

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.4, pp. 131-132, 2011, DOI:10.3970/icces.2011.018.131

Abstract Dynamics of droplet impact on solid surfaces is of great importance in many engineering applications such as ink-jet printing and rapid spray cooling of hot surfaces. In this study, the lattice kinetic scheme based on the lattice Boltzmann method for immiscible two-phase fluids [Inamuro (2006)] is applied to such micro-fluid problems. The present method enables us to perform stable calculations of two-phase flows with large density ratios of up to 1000. The boundary condition based on the wetting potential that is calculated according to a prescribed static contact angle is used on solid surfaces [Briant,… More >

Rong Shen, Guangchao Zuo, Wanlin Guo

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.4, pp. 113-114, 2011, DOI:10.3970/icces.2011.018.113

Abstract The NaK channel from Bacillus cereus, with properties of Na+ and K+ permeability and Ca2+ blockage, is the first structure of cation channels without high selectivity to K+ ion. Here, we investigate the mechanism for non-selective ion conduction in NaK channel by systematical molecular dynamics simulations. It is shown that K+ ions prefer to bind within the sites formed by two adjacent planes of oxygen atoms from the selectivity filter, while Na+ ions are inclined to bind to a single plane of four oxygen atoms. Meanwhile, we find four small grottos connecting with the vestibule… More >