Search Results - "Moreira, A.L.N."

Experimental investigation on heat transfer and pressure drop of internal flow in corrugated tubes by Andrade, F., Moita, A.S., Nikulin, A., Moreira, A.L.N., Santos, H.

“…•Diabatic and adiabatic friction factor data for two corrugated tubes.•Corrugated tubes presented a smoother transition than the smooth tube.•Corrugated tubes…”
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Effect of pattern geometry on bubble dynamics and heat transfer on biphilic surfaces by Pontes, Pedro, Cautela, Ricardo, Teodori, Emanuele, Moita, Ana, Liu, Yan, Moreira, A.L.N., Nikulin, Artem, del Barrio, Elena Palomo

“…•Explore the boiling mechanisms while using biphilic surfaces.•Alter biphilic geometrical parameters to enhance heat transfer capabilities.•Use non-intrusive…”
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Effect of extreme wetting scenarios on pool boiling conditions by Teodori, E., Valente, T., Malavasi, I., Moita, A.S., Marengo, M., Moreira, A.L.N.

“…•Pool boiling bubble dynamics on extreme wetting regimes is described in detail.•Under extreme wetting regimes, wettability plays a dominant…”
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How does change of the bulk concentration affect the pool boiling of the refrigerant oil solutions and their mixtures with surfactant and nanoparticles? by Nikulin, A., Khliyeva, O., Zhelezny, V., Semenyuk, Yu, Lukianov, N., Moreira, A.L.N.

“…•The oil concentration near by the heater was higher compared to the initial one.•The increase in oil concentration leads to systematic underestimation of the…”
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Effect of alumina nanofluids on bubble dynamics and heat transfer under quiescent conditions by Santos, R., Ribeiro, A.P.C., Moreira, A.L.N., Moita, Ana Sofia Oliveira

“…•Pool boiling of alumina based nanofluids is studied for cooling applications.•Bubble dynamics is focused combining high-speed visualization and…”
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Drop impacts onto cold and heated rigid surfaces: Morphological comparisons, disintegration limits and secondary atomization by Moita, A.S., Moreira, A.L.N.

“…This paper addresses an experimental study aimed at characterizing the mechanisms of disintegration which occur when individual water and fuel droplets impact…”
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Influence of surface topography in the boiling mechanisms by Moita, A.S., Teodori, E., Moreira, A.L.N.

“…•Pool boiling heat transfer.•Use of micro-textured surfaces to enhance heat transfer.•Importance of the bubble dynamics and of the interaction mechanisms in…”
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Advances and challenges in explaining fuel spray impingement: How much of single droplet impact research is useful? by Moreira, A.L.N., Moita, A.S., Panão, M.R.

“…The impingement of fuel spray onto interposed surfaces in an IC engine, equipped either with a direct or an indirect injection system, is a fundamental issue…”
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Fluid flow and heat transfer in microchannel devices for cooling applications: Experimental and numerical approaches by Pontes, P., Gonçalves, I., Andredaki, M., Georgoulas, A., Moreira, A.L.N., Moita, A.S.

“…•Two phase flow in microchannels is characterized by numerical and experimental approaches.•Transition from bubbly flow to slug plug flow is numerically…”
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Enhancement of microchannel heat sink heat transfer: Comparison between different heat transfer enhancement strategies by Marseglia, G., De Giorgi, M.G., Pontes, P., Solipa, R., Souza, R.R., Moreira, A.L.N., Moita, A.S.

“…•Different strategies are analyzed to enhanced microchannels based heat sinks.•Nanofluids to enhance heat performance of microchannel based heat sinks is…”
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Experimental description of bubble dynamics and heat transfer processes occurring on the pool boiling of water on biphilic surfaces by Pontes, P., Cautela, R., Teodori, E., Moita, A.S., Moreira, A.L.N.

“…•Synchronized high-speed video and thermography for pool boiling characterization.•Biphilic surfaces enhance pool boiling heat transfer.•Smaller…”
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Experimental investigation on the effects of the geometry of microchannels based heat sinks on the flow boiling of HFE-7100 by Marseglia, G., De Giorgi, M.G., Carvalho, D.S., Pontes, P., Souza, R.R., Moreira, A.L.N., Moita, A.S.

“…•MCHs with different aspect ratios and wall thickness are tested.•New experimental procedures based on high-speed thermography are performed.•A MEMS device…”
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Thermofluid characterization of nanofluids in spray cooling by Marseglia, Guido, Sanches, M., Ribeiro, A.P.C., Moreira, A.L.N., Moita, A.S.

“…•Nanofluid have potentil to enhance thermal performance of spray is demonstrated.•Different concentrations of alumina and silver nanoparticles are…”
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Effect of Al2O3 nanoparticles on laminar, transient and turbulent flow of isopropyl alcohol by Nikulin, A., Moita, A.S., Moreira, A.L.N., Murshed, S.M.S., Huminic, A., Grosu, Y., Faik, A., Nieto-Maestre, J., Khliyeva, O.

“…•Single-phase flow of isopropanol/Al2O3 nanofluid was studied.•Viscosity of nanofluid exhibit non-linear trend vs. temperature.•Dependence of the friction…”
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Thermographic analysis of interfacial heat transfer mechanisms on droplet/wall interactions with high temporal and spatial resolution by Teodori, E., Pontes, P., Moita, A.S., Moreira, A.L.N.

“…•Droplet spreading on heated surfaces is studied under extreme wetting regimes.•High-speed visualization is combined with time resolved infrared analysis.•IR…”
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Fast, flexible and low-cost multiphase blood analogue for biomedical and energy applications by Lima, Rui Alberto Madeira Macedo, Vega, E. J., Moita, A. S., Miranda, J. M., Pinho, Diana, Moreira, A. L. N.

“…During the last two decades, several kinds of particulate blood analogue fluids have been proposed, but none of those were able to mimic the multiphase effects…”
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Effect of nanoparticles concentration on the characteristics of nanofluid sprays for cooling applications by Malý, M., Moita, A. S., Jedelsky, J., Ribeiro, A. P. C., Moreira, A. L. N.

“…This study addresses the effect of nanofluid synthesis on the rheological properties of the resulting fluid and their consequent effect on the characteristics…”
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A new approach for predicting the pool boiling heat transfer coefficient of refrigerant R141b and its mixtures with surfactant and nanoparticles using experimental data by Khliyeva, O., Zhelezny, V., Lukianova, T., Lukianov, N., Semenyuk, Yu, Moreira, A. L. N., Murshed, S. M. S., Palomo del Barrio, Elena, Nikulin, A.

“…In the present study, the pool boiling process for the refrigerant R141b and its mixtures with Span 80 surfactant and TiO 2 nanoparticles has been examined…”
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Characterization of pool boiling mechanisms over micro-patterned surfaces using PIV by Teodori, E., Moita, A.S., Moreira, A.L.N.

“…The present work addresses hydrodynamic and heat transfer processes of pool boiling over surfaces patterned with micro-cavities, in the context of cooling…”
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Design, fabrication and test of an integrated multi-microchannel heat sink for electronics cooling by Silvério, V., Cardoso, S., Gaspar, J., Freitas, Paulo P., Moreira, A.L.N.

“…•A microchannel cooling device is designed and fabricated using microfabrication techniques for integrated heaters and sensors.•Precise and interface-free heat…”
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