... characteristics, e.g., surface roughness, surface damage, oxide layers, and deposited thin films, and cannot be assumed as those of pure materials, typically referred to optically smooth surfaces (OS). An experimental investigation of the thermal emittance of some metals (nickel, titanium, silver, and stainless...

.... 654 – 678 . 10.1016/j.rser.2016.08.036 [8] Sefiane , K. , and Bennacer , R. , 2009 , “ Nanofluids Droplets Evaporation Kinetics and Wetting Dynamics on Rough Heated Substrates ,” Adv. Colloid Interface Sci. , 147–148 , pp. 263 – 271 . 10.1016/j.cis.2008.09.011 [9...

..., experimental results of heat transfer coefficients (HTCs) during pool boiling of de-ionized water (DI water), Al 2 O 3 -DI water- and Fe 2 O 3 -DI water-based nanofluids are presented in this paper. Based on these results, the effect of surface roughness and nanofluid concentration on the surface wettability...

... by the distance between the two walls. In the same way, the effect of wall roughness on the thermal conductivity is investigated, which shows that roughness is effective only for low distances between the walls. Also, the thermal conductivity of argon under Poiseuille flow in a nanochannel is studied. The results...

...Viet-Dung Nguyen; Philippe Dufrénoy; Patrice Coorevits The objective of this study focuses on the energy dissipation by friction on the interface of a braking system and the effects of roughness and granular plateaus on heat propagation. Faced with the difficulty of defining velocity accommodation...

... in capturing even the qualitative behavior of slip flow along curved walls. We will present the channel global and local performance in terms of the Poiseuille number Po, where the friction factor f is defined as an average value either over a portion of rough section of the channel or over a single...

...Ting-Yu Lin; Satish G. Kandlikar The effect of structured roughness on the heat transfer of water flowing through minichannels was experimentally investigated in this study. The test channels were formed by two 12.7 mm wide × 94.6 mm long stainless steel strips. Eight structured roughness elements...

...Zhipeng Duan; Y. S. Muzychka The effect of axial corrugated surface roughness on fully developed laminar flow in microtubes is investigated. The radius of a microtube varies with the axial distance due to corrugated roughness. The Stokes equation is solved using a perturbation method with slip...

... roughness. The new all-liquid and all-vapor data are successfully compared against predictions of single-phase flow models. Also the two-phase flow data are compared against a model previously developed by the present authors for adiabatic flow or flow during condensation of halogenated refrigerants inside...

...Robert L. Jackson; Sushil H. Bhavnani; Timothy P. Ferguson A new multiscale model of thermal contact resistance (TCR) between real rough surfaces is presented, which builds on Archard’s multiscale description of surface roughness. The objective of this work is to construct the new model and use...

...Q. Z. Zhu; Z. M. Zhang Both one-dimensional (1D) and two-dimensional (2D) slope distributions were obtained from the surface topographic data, measured using an atomic force microscope for a rough silicon surface. The resulted slope distributions deviate significantly from the Gaussian distribution...

...Stephen E. Turner; Lok C. Lam; Mohammad Faghri; Otto J. Gregory This paper presents an experimental investigation of laminar gas flow through microchannels. The independent variables: relative surface roughness, Knudsen number and Mach number were systematically varied to determine their influence...

... contact resistance 8 9 . Thermal constriction is an important phenomenon which occurs at the interface of two solids due to surface defects (flatness, roughness of first, second order…). This phenomenon is modeled by a thermal constriction resistance...

...-rib data are then slightly higher than the 45 deg and 60 deg parallel rib data from Han et al. 5 6 and the 45 deg parallel rib data from Taslim et al. 7 for Re H < 30,000 , and either slightly lower or in rough agreement with these data at higher Reynolds numbers. Thermal...

... Internal Roughness Turbulent Rrb Turbulators Variable property effects are important in internal passages whenever the ratio of surface temperature to local mixed mean temperature is significantly different from one. This occurs in a variety of applications, including electronics cooling, heat...

... resistance random processes Contact Resistance Heat Transfer Interface Roughness Tribology We consider a laterally insulated semi-infinite square prism (Fig. 1 ), with side, L , thermal conductivity, k , and zero reference temperature. The face, z = 0 , is submitted...

...S. Sunil Kumar; K. Ramamurthi The effect of surface roughness, waviness and flatness deviations on thermal contact conductance is predicted. Threshold values of the surface parameters which do not adversely influence thermal contact conductance are determined. Flatness deviations less than ten...

...Y. H. Zhou; Z. M. Zhang This paper presents a Monte Carlo model for prediction of the radiative properties of semitransparent silicon wafers with rough surfaces. This research was motivated by the need of accurate temperature measurement in rapid thermal processing (RTP) systems. The methods...

..., 2002. Associate Editor: G. Dulikravich. 26 November 2001 21 May 2002 03 12 2002 interface phenomena optimisation thermal resistance Constructal Contact Resistance Geometry Roughness It was shown recently that the geometric form of natural flow systems can...

... February 14, 2002. Associate Editor; H. S. Lee. 14 August 2001 14 February 2002 16 07 2002 rotational flow flow measurement channel flow heat transfer cooling Enhancement Heat transfer Rotating Roughness Turbines As the world becomes exceedingly...