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Lattice Boltzmann Simulation of Nucleate Pool Boiling in Saturated Liquid

Communications in Computational Physics 2011年第5期9卷 1347-1361页

作者： Yoshito Tanaka masato yoshino Tetsuo Hirata Department of Mathematics and System Development Engineering Interdisciplinary Graduate School of Science and TechnologyShinshu University4-17-1WakasatoNagano-shiNagano 380-8553Japan Department of Mechanical Systems Engineering Faculty of EngineeringShinshu UniversityNagano-shiNagano 380-8553Japan CREST Japan Science and Technology Agency4-1-8HonchoKawaguchi-shiSaitama 332-0012Japan

A thermal lattice Boltzmann method(LBM)for two-phase fluid flows in nucleate pool boiling process is *** the present method,a new function for heat transfer is introduced to the isothermal LBM for two-phase immiscible fluids with large density *** calculated temperature is substituted into the pressure tensor,which is used for the calculation of an order parameter representing two phases so that bubbles can be formed by nucleate *** using this method,twodimensional simulations of nucleate pool boiling by a heat source on a solid wall are carried out with the boundary condition for a constant heat *** flow characteristics and temperature distribution in the nucleate pool boiling process are *** is seen that a bubble nucleation is formed at first and then the bubble grows and leaves the wall,finally going up with deformation by the buoyant *** addition,the effects of the gravity and the surface wettability on the bubble diameter at departure are numerically *** calculated results are in qualitative agreement with other theoretical predictions with available experimental data.

关键词： Lattice Boltzmann method(LBM) two-phase fluid flows heat transfer nucleate pool boiling wettability

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Three-Dimensional Lattice Boltzmann Simulation of Two-Phase Flow Containing a Deformable Body with a Viscoelastic Membrane

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Communications in Computational Physics 2011年第5期9卷 1397-1413页

作者： Toshiro Murayama masato yoshino Tetsuo Hirata Department of Mathematics and System Development Engineering Interdisciplinary Graduate School of Science and TechnologyShinshu University4-17-1 WakasatoNagano-shiNagano 380-8553Japan Satellite Venture Business Laboratory(SVBL) Shinshu University3-15-1 TokidaUeda-shiNagano 386-8567Japan Department of Mechanical Systems Engineering Faculty of EngineeringShinshu University4-17-1 WakasatoNagano-shiNagano 380-8553Japan CREST Japan Science and Technology Agency4-1-8 HonchoKawaguchi-shiSaitama 332-0012Japan

The lattice Boltzmann method(LBM)with an elastic model is applied to the simulation of two-phase flows containing a deformable body with a viscoelastic *** numerical method is based on the LBM for incompressible two-phase fluid flows with the same *** body has an internal fluid covered by a viscoelastic membrane of a finite *** elastic model is introduced to the LBM in order to determine the elastic forces acting on the viscoelastic membrane of the *** the present method,we take account of changes in surface area of the membrane and in total volume of the body as well as shear deformation of the *** using this method,we calculate two problems,the behavior of an initially spherical body under shear flow and the motion of a body with initially spherical or biconcave discoidal shape in square pipe *** deformations of the body(the Taylor shape parameter)for various shear rates are in good agreement with other numerical ***,tank-treading motion,which is a characteristic motion of viscoelastic bodies in shear flows,is simulated by the present method.

关键词： Lattice Boltzmann method(LBM) two-phase flow viscoelastic membrane shear flow tank-treading motion

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Interactions between Phospholipid Monolayers (DPPC and DMPC) and Anesthetic Isoflurane Observed by Quartz Crystal Oscillator

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Journal of Biophysical Chemistry 2015年第2期6卷 42-53页

作者： Yasushi Yamamoto Takashi Yokoyama Daisuke Yoshida Hiroya Mori Karina Sekiguchi Takatsugu Shimoaki Akihiro yoshino Keijiro Taga Zameer Shervani masato Yamamoto Department of Materials Science and Engineering Nagoya Institute of Technology Nagoya Japan Tohoku Foods Corporation Limited Sendai Japan Department of Chemistry Graduate School of Science Tohoku University Sendai Japan College of Arts and Sciences Showa University Fujiyoshida Japan

The interactions of phospholipid monolayers (dipalmitoyl phosphatidyl choline;DPPC and dimyristoyl phosphatidyl choline;DMPC) with volatile anesthetic isoflurane were investigated using quartz crystal microbalance (QCM) and quartz crystal impedance (QCI) methods. The quartz crystal oscillator was attached horizontally on the surface of DPPC and DMPC monolayer formed on the water surface. Physisorption of isoflurane hydrate at the DPPC monolayer surface was monitored in terms of frequency and resistance change of quartz crystal on addition of anesthetics isoflurane. Both frequency and resistance change showed the elastic nature of DPPC monolayer. Measurement of DMPC monolayer-isoflurane hydrate revealed the expandable nature of DMPC monolayer. Variation of frequency and impedance of DPPC and DMPC monolayer on addition of isoflurane which proved a two-step change has occurred at monolayer surface at isoflurane concentration of ≤8 mM that has been attributed to isoflurane aggregation at monolayer/water interface. Isoflurane hydrates formed in the process have capability to affect the interfacial properties of monolayer such as existence of structured water.

关键词： Physisorption DPPC Monolayer DMPC Monolayer Quartz Crystal Oscillator Anesthetic Isoflurane-Monolayer Interaction

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