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Showing 1 to 13 of 13 for “"Porous-Coating"”.
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Characterization of pool boiling heat transfer from porous-coating-enhanced surfaces
… analysis of heat transfer enhancement by surface-coating-based boiling enhancement methods and to quantitatively analyze the dependence of heat transfer performance on coating properties.</p> <p>For passive systems, which cannot afford active cooling due to either form factor or other application …
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Validation of numerical prediction of bone ingrowth into cementless implants
… implants depend on the ingrowth of bone into a porous coating, to produce a durable method of implant fixation which the normal bone turnover process will maintain. One of the problems with cementless implants is that the type and extent of tissue ingrowth into the porous coating is …
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Analytical studies of corrosion and wear resistant CrN/NbN superlattice PVD coatings.
CrN/NbN nano-scale multilayered coatings have found use in a number of commercial applications where both wear and corrosion resistance are important factors that are required. CrN/NbN nano-scale multilayered coatings have been successfully deposited at temperatures as low as 250°C on 304 …
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Determination of pool boiling Critical Heat Flux enhancement in nanofluids
… in the two-phase flow regime. SEM images show a porous coating layer of nanoparticles on wires subjected to nanofluid CHF tests. These coating layers change the morphology of the heater's surface, and are responsible for the CHF enhancement. The thickness of the coating was estimated using SEM …
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Bacterial biofilms and biomineralisation on titanium
… to produce a hydroxyapatite (HA) coating on titanium. Adherence of Gram-positive Staphylococcus epidermidis and Streptococcus sanguinis and Gram-negative Serratia sp. NCIMB 40259 and Escherichia coli was compared on commercially pure titanium, Ti6Al4V alloy, pure aluminium and pure …
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Surface Coatings for Antimicrobial Activity and Fast Evaporation
Coatings play a pivotal role in everyday life and across various industries. They offer protection, corrosion resistance, insulation, optical improvements, aesthetics, etc. This study investigates the design, fabrication, characterization and evaluation of surface coatings in two areas: …
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Formation of salt crystal whiskers on nanoporous coatings and coating onto open celled foam.
… were grown from salt solution saturated nanoporous silica coatings. Coated substrates were partially immersed into an aqueous potassium chloride solution and then kept in a controlled relative humidity chamber for whisker growth. The salt solution was first wicked into the coating by …
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Fabrication of Thermal Management Devices using Thermal Spray Technology
Thermal spray coating processes have been employed to create a composite finned heat sink and a flat vapor chamber featuring structured porous coating wicks, for thermal management application. Three composite heat sinks in the shape of a disk, a cylinder, and a cylinder with vertically projecting …
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Electrohydrodynamic Microfabricated Ionic Wind Pumps for Electronics Cooling Applications
… and explores the effect of employing a palladium coating on the device. Various design configurations and optimization processes were explored and modeled computationally to investigate their influence on the cooling phenomenon. The optimized single element device provides a convection heat …
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Numerical simulation of implant-bone interaction following cementless joint replacement
… components rely on the ingrowth of bone into a porous coating, which covers a portion of the component surface, to achieve the required mechanical interlock. Once mineralised bone tissue has formed within .the porous surface, a stable bond results which will be maintained by the normal bone …
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Wettability on nanoparticle modified surface: for thermal engineering
… wettability. The properties of the deposited nanoporous layer are affected by the nanofluid boiling parameters such as nanoparticle concentration, nanoparticle type and size, solvent liquid type, boiling surface roughness, heat flux, boiling deposition duration and so on. In this thesis, an …
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Applications of room temperature ionic liquids in interfacial polymerization
… series of 1 -alkyl-3-methylimidazolium ILs. Nanoporous or nanofibrous polymer morphologies with various sizes ranging from 50 to 500 nm and geometries, depending on the ILs used, were observed by scanning electron microscopy (SEM). A correlation length of ~20nm and a suppression of …
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Experimental Study of Meniscus Thin-Film Evaporation in a Horizontal-Tube, Falling-Film Heat Exchanger, Focusing on Dynamic Contact Angle Variation of an Advancing Meniscus
… subcooling, evaporator wall superheat, and porous-layer coating on the portions of sensible and evaporation heat transfer in a falling-film system. The porous layer was found to enhance both sensible and evaporation heat transfer by exploiting the capillary pumping of the porous matrix, …