0000000000123087

AUTHOR

Essolé Padayodi

showing 3 related works from this author

Physical modeling of heat and moisture transfer in wet bio-sourced insulating materials.

2018

Simultaneous heat and moisture transfers in bio-sourced insulating materials are significant phenomena in thermal metrology. The present study focuses on these phenomena by experimental and numerical approaches based on the asymmetric hot-plate method. In this paper, a bio-sourced insulating material based on flax fibers is developed. The thermal and hygric properties of the sample are then investigated in the humid atmosphere. The temperature is maintained at 30 °C, and the relative humidity varies between 30% and 90% RH. A physics-based model of simultaneous heat and moisture transfer is developed for thermal conductivity estimation. This model is discretized with finite difference method…

Moisture[SHS.INFO]Humanities and Social Sciences/Library and information sciences0211 other engineering and technologiesFinite difference method02 engineering and technology021001 nanoscience & nanotechnologyAtmosphereThermal conductivity measurementThermal conductivity021105 building & constructionHeat transferThermalRelative humidityComposite material0210 nano-technologyInstrumentationComputingMilieux_MISCELLANEOUSThe Review of scientific instruments
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In-flight temperature of solid micrometric powders during cold spray additive manufacturing

2020

Abstract During cold dynamic gas spray additive manufacturing, the thermal field within particles is generally simplified by a state of an instantaneous uniform distribution over the particle's media at any position inside and outside the De-Laval nozzle. This paper addresses critical discussions using analytical and computational analysis of the transient heat transfer within the solid particles due to the convective exchange with the flowing gas. An analytical criterion depicts conditions of instantaneous uniform temperature over the range of typical cold spray data including various particle thermal conductivity, particle size range, dragging velocities, gas nature and gas setting condit…

ConvectionRange (particle radiation)Materials science020209 energyGeneral EngineeringGas dynamic cold spray02 engineering and technologyMechanicsCondensed Matter PhysicsResidence time (fluid dynamics)01 natural sciences010305 fluids & plasmasTemperature gradient[SPI]Engineering Sciences [physics]Thermal conductivity0103 physical sciences0202 electrical engineering electronic engineering information engineeringParticleParticle size
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A new nature of microporous architecture with hierarchical porosity and membrane template via high strain rate collision

2019

Abstract This paper presents the formation of an unusual porous structure at Al/Al interface joined by magnetic pulse welding. The porous structure consists of a hierarchical microporous architecture with pore size of less than 2 µm that represents more than 80% over the whole area, in which 38% of them are sub-micron size pores. It also exhibits ultra-thin wall, sufficiently thin enough to behave as an electron-transparent material with a wall thickness of 50 nm. The formation of this porous structure is attributed to a cavitation process of a molten material in three stages including, (1) nucleation, (2) growth and coalescence and (3) solidification. Further analysis of this cavitation pr…

Materials science[SHS.INFO]Humanities and Social Sciences/Library and information sciencesNucleation02 engineering and technologyWeldingBallistic collisionPorous structure01 natural scienceslaw.invention[SHS]Humanities and Social SciencesSurface tensionlaw0103 physical sciencesGeneral Materials ScienceComposite materialPorosityComputingMilieux_MISCELLANEOUS010302 applied physicsCoalescence (physics)DepressurizationCavitationMicroporous material021001 nanoscience & nanotechnologyMagnetic pulse weldingCavitationMicro-pores0210 nano-technology
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