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dc.contributor.authorAvanessian, Tadeh
dc.contributor.authorHwang, Gisuk
dc.identifier.citationAvanessian T, Hwang G. Adsorption and Capillary Condensation in Nanogap With Nanoposts. ASME. Heat Transfer Summer Conference, Volume 2: Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing ():V002T13A008en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractAdsorption isotherm and adsorption-capillary transition theories have been developed based on homogeneous micro-/nanoporous materials and structures. However, material and structures are often heterogeneous including local surface roughness and defects, where no predictive tool is available so far. In this study, the adsorption isotherm and the adsorption-capillary transition is examined for Ar-filled Pt nanogap (Lz = 5 nm) with nanoposts (one surface only) using Grand Canonical Monte Carlo (GCMC) simulations. Results show that the presence of the nanoposts causes a bimodal capillary transition and reduces the capillary transition pressure compared to the nanogap with both bare surfaces. The pressure difference between the bimodal transitions is pronounced with decreasing the nanopost pitch size. The larger nanopost height also leads to the early capillary transition, but the bimodal transition is pronounced for moderate heights of the nanoposts. A stronger solid-fluid interaction reduces the adsorption-capillary transition pressure at given temperature and increases the transition pressure difference between the nanogaps with or without nanoposts. The obtained results provide new insights of the role of surface nanostructure (nanoposts) into adsorption isotherm and capillary transition.en_US
dc.description.sponsorshipNational Science Foundation [EPS-0903806, ACI-1053575]; State of Kansas through the Kansas Board of Regents; College of Engineering, Wichita State University.en_US
dc.relation.ispartofseriesASME 2017 Heat Transfer Summer Conference;v.2
dc.subjectSurface roughnessen_US
dc.subjectEngineering simulationen_US
dc.subjectNanoporous materialsen_US
dc.titleAdsorption and capillary condensation in nanogap with nanopostsen_US
dc.typeConference paperen_US
dc.rights.holderCopyright © 2017 by ASMEen_US

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