Search Results for wetting

Fig. 16 Wetting behavior between a liquid and a solid showing (a) good wetting, (b) poor wetting, and (c) complete wetting, for a liquid with a contact angle of θ More

Fig. 8 Wetting behavior and change of heat-transfer coefficient (α) along the surface of a metallic probe. (a) Immersion cooling. (b) Film cooling. Source: Ref 36 , 40 . Reprinted, with permission, from Fuels and Lubricants Handbook: Technology, Properties, Performance and Testing More

Fig. 9 Wetting front kinematics during quenching of a conical-end AISI 304 stainless steel probe in water flowing (parallel to the probe) at 0.2 m/s (0.7 ft/s). (a) Wetting front location as a function of time during quenching in water at 60 °C (140 °F). Data (symbols); linear regression (line More

Fig. 13 Wetting front kinematics in a composite probe with solid material at the bottom, hollow in the upper part, and no screw threads. Quenched in high-speed oil at 80 °C (175 °F) without agitation. Source: Ref 49 More

Fig. 15 Wetting front kinematics, along the axial direction, for (a) horizontally and (b) vertically oriented rings. Source: Ref 50 More

Fig. 16 Observed wetting-front advancement (left) and temperature distribution (right) calculated by using the local heat-transfer coefficient when immersion cooling an AISI 4140 steel cylinder of 40 mm (1.6 in.) diameter by 120 mm (4.7 in.) in 80 °C (180 °F) water. Source: Ref 11 More

Fig. 20 Wetting of large, spherical tungsten particles by liquid copper during liquid phase sintering. (a) In vacuum, wetting is very good. Most of liquid copper fills the contact regions, and some of it spreads over the surface of the tungsten spheres. (b) In an oxygen-containing argon More

Fig. 7 Schematic representation of molten solder wetting a substrate. The balance of surface tension forces at the contact edge is illustrated by the black arrows. More

Fig. 6 Intergranular fracture surface showing partial intergranular wetting with both solid-solid and liquid-liquid bonding. 500× More

Fig. 18 Optical micrographs of 60Sn-40Pb solder on sample surfaces. (a) Wetting. (b) Dewetting. (c) Nonwetting. Source: Sandia National Laboratories More

Fig. 19 Wetting balance trace for solderability tests and acceptance criteria per MIL-STD-883C More

Fig. 3 Effect of interfacial energies on sessile drops. (a) No wetting takes place when contact angle is > 90°. (b) Wetting occurs when contact angle is < 90°. More

Fig. 5 Liquid solder droplets on a solid surface under two conditions. (a) Wetting. (b) Nonwetting. Arrows indicate surface tension. More

Fig. 5 Surface hardness profile calculated from the measured wetting time, t B , and the specific calibration curve for the material related to the distance from the lower end of the sample and compared to the measured hardness profile. Sample: 25 × 100 mm (1 × 4 in.) diam 100Cr6. Bath More

Fig. 1 Sessile drop configurations: (top) wetting, and (bottom) nonwetting. γ sv and γ lv , surface tensions and surface free energies of the solid-vapor and liquid-vapor, respectively. γ sl , interfacial energy of the solid-liquid. −dG R /dA · dt, free energy of reaction More

Fig. 1 Wetting characteristics as evaluated by the angle, θ, between a droplet of liquid and a solid surface. (a) Good wetting is obtained when θ < 90°. (b, c) Poor wetting results when θ ≥ 90°. More

Fig. 4 Motion of the wetting front during immersion quenching More

Fig. 5 Heat transition showing the phases of wetting during film boiling. Source: Ref 12 More

Fig. 6 The wetting state of sample surface at time t* and the change of HTC at the place Z* with the time t (schematically). (a) ZB place of transition from film boiling to nucleate boiling (i.e., point of wetting front). (b) Z* random surface point; tB time when the wetting front has reached More

Fig. 18 Examples of the wetting process upon immersion in quenching media (rewetting). These media include (a) petroleum oil, (b) water, (c) a prismatic surface quenched in water, (d) aqueous solution of polymer 1, and (e) aqueous solution of polymer 2. Source: Ref 59 More