Academic literature on the topic 'Inhomogeneous fluids'

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Journal articles on the topic "Inhomogeneous fluids"

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Slattery, John C. "Fundamentals of Inhomogeneous Fluids." Chemical Engineering Journal and the Biochemical Engineering Journal 53, no. 3 (February 1994): 201. http://dx.doi.org/10.1016/0923-0467(93)02819-i.

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Varea, C., and A. Robledo. "Stress tensor of inhomogeneous fluids." Physica A: Statistical Mechanics and its Applications 233, no. 1-2 (November 1996): 132–44. http://dx.doi.org/10.1016/s0378-4371(96)00244-0.

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Myrzakulov, Ratbay, and Lorenzo Sebastiani. "Inhomogeneous viscous fluids for inflation." Astrophysics and Space Science 356, no. 1 (December 4, 2014): 205–13. http://dx.doi.org/10.1007/s10509-014-2203-5.

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Boudh-Hir, M. E. "New developments for inhomogeneous fluids." Molecular Physics 63, no. 5 (April 10, 1988): 939–49. http://dx.doi.org/10.1080/00268978800100671.

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Hoang, Hai, and Guillaume Galliero. "Shear viscosity of inhomogeneous fluids." Journal of Chemical Physics 136, no. 12 (March 28, 2012): 124902. http://dx.doi.org/10.1063/1.3696898.

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Todd, B. D., Denis J. Evans, and Peter J. Daivis. "Pressure tensor for inhomogeneous fluids." Physical Review E 52, no. 2 (August 1, 1995): 1627–38. http://dx.doi.org/10.1103/physreve.52.1627.

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Das, Subir K., and Sanjay Puri. "Inhomogeneous cooling in inelastic granular fluids." Physica A: Statistical Mechanics and its Applications 318, no. 1-2 (February 2003): 55–62. http://dx.doi.org/10.1016/s0378-4371(02)01403-6.

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Godin, Oleg A. "Acoustic energy streamlines in inhomogeneous fluids." Journal of the Acoustical Society of America 135, no. 4 (April 2014): 2362. http://dx.doi.org/10.1121/1.4877784.

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Parry, A. O., and P. S. Swain. "Correlation function algebra for inhomogeneous fluids." Journal of Physics: Condensed Matter 9, no. 11 (March 17, 1997): 2351–73. http://dx.doi.org/10.1088/0953-8984/9/11/006.

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Sokolowski, Stefan, and Johann Fischer. "Density functional theory for inhomogeneous fluids." Molecular Physics 68, no. 3 (October 20, 1989): 647–57. http://dx.doi.org/10.1080/00268978900102431.

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Dissertations / Theses on the topic "Inhomogeneous fluids"

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Reich, Thorsten Hendrik Bozzo. "Inhomogeneous hard platelet fluids." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=983423806.

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Zhang, Junfang, and junfang zhang@csiro au. "Computer simulation of nanorheology for inhomogeneous fluids." Swinburne University of Technology. Centre for Molecular Simulation, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20050620.095154.

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In this thesis, we use nonequilibrium molecular dynamics (NEMD) methods to investigate the structural and dynamic properties of highly confined atomic and polymeric fluids undergoing planar Poiseuille flow. We derive 'method of planes' expressions for pressure tensor and heat flux vector for confined inhomogeneous atomic fluids under the influence of three-body forces. Our derivation is validated against NEMD simulations of a confined atomic fluid acted upon by a two-body Barker-Fisher-Watts force coupled with the Axilrod-Teller three-body force. Our method of planes calculations are in excellent agreement with the equivalent mesoscopic route of integrating the momentum and energy continuity equations directly from the simulation data. Our calculations reveal that three-body forces have an important consequence for the isotropic pressure, but have negligible in�uence on the shear stress and heat flux vector for a confined simple fluid. We use the non-local linear hydrodynamic constitutive model, proposed by Evans and Morriss [1] for computing a viscosity kernel, a function of compact support, for inhomogeneous nonequilibrium fluids. Our results show that the viscosity kernel, �(y), has a peak at y = 0, and gets smaller and decays to zero as y increases. Physically, it means that the strain rate at the location where we want to know the stress contributes most to the stress, and the contribution of the strain rate becomes less significant as the relative distance y increases. We demonstrate that there is a limitation in the model when it is applied to our confined fluids due to the effect of domain restriction on inverse convolution. We study the nanorheology of simple polymeric fluids. Our NEMD simulation results show that sufficiently far from the walls, the radius of gyration for molecules under shear in the middle of the channel follows the power law, Rg / N�, where N is the number of bonds and the exponent has a value � = 0:60�0:04, which is larger than the melt value of 0:5 for a homogeneous equilibrium �uid. Under the conditions simulated, we find that viscous forces dominate the flow, resulting in the onset of plug-like flow velocity pro�les with some wall slippage. An examination of the streaming angular velocity displays a strong correlation with the radius of gyration, being maximum in those regions where Rg is minimum and vice-versa. The angular velocity is shown to be proportional to half the strain rate su�ciently far from the walls, consistent with the behaviour for homogeneous fluids in the linear regime. Finally, we make some concluding remarks and suggestions for future work in the final chapter.
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Sartori, Anna. "Wetting at non-planar walls : unbending, unbinding and beyond." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247084.

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Razavi, Seyed Mostafa. "OPTIMIZATION OF A TRANSFERABLE SHIFTED FORCE FIELD FOR INTERFACES AND INHOMOGENEOUS FLUIDS USING THERMODYNAMIC INTEGRATION." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1481881698375321.

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Herring, Adam Russell. "Computer Simulation Studies of Inhomogeneous Fluids: The Depletion Force and the Disjoining Pressure of Colloidal Physics." Thesis, University of Leeds, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491650.

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Investigations have been carried out via Monte Carlo simulation of simple, inhomogeneous fluids into two important quantities of colloidal systems; the depletion force and the disjoin'': ing pressure. Simulations of a hard-sphere solvent confined to the annular wedge formed between a spherical hard colloid and a planar hard wall were performed in order to shed light on the recently discovered disagreement of several results for the depletion force in the nanD-colloidal regime at solvent density pa3 > 0.6. Emphasis is placed on attempting to understand the limits of validity in terms of colloid size for the Derjaguin approximation applied to depletion forces and fundamental-measures-theory density functional theory (FMT-DFT), and the manner in which the depletion force scales between these two results at intermediate colloid sizes. The depletion force was evaluated via an exact statistical mechanical sum rule requiring only knowledge of the integral of the one-body density of solvent at the planar hard wall from the apex of the wedge to a large distance from the colloid. Simulations were performed for a colloid/solvent size ratio of 8 = 20 for several colloid-wall separations, h, between physical contact and the hard-sphere solvent diameter, a, at pa3 = 0.764, the results for the depletion force appearing to be consistent with a recently proposed theoretic model suggesting a (curiously non-analytic) 8-1/ 2 correction to the linear scaling behaviour of the depletion force with colloid size between the FMT-DFT and Derjaguin results, with the Derjaguin result valid in the large colloidal limit 8 --t 00 and FMT-DFT only as colloid size approaches solvent size. Further simulations, restricted to h = a for 8 = 10, 30, 50 and 100 though reveal that at least for this special separation 8-1/ 2 scaling does not hold, suggesting that to confirm scaling behaviour requires simulations over the entire range 0 ~ h ~ a for several values of 8. The disjoining pressure profile has been simulated through the three-phase contact line formed between the liquid-vapour interface of a square-well fluid at bulk liquid-vapour coexistence and a planar, square-well wall for three different depths of the wall-fluid potential. The disjoining pressure is found to follow a smooth, downward curve across the contact line that is well fit by a Gaussian. The simulation method used to make these disjoining pressure measurements has been validated using a statistical mechanical sum rule linking the integral of the disjoining pres- . . sure across the contact line to the liquid-vapour surface tension and macroscopic Young's contact angle, both measured from the interface far from three-phase contact.
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Wu, Liang. "Modelling liquid crystalline ordering in anisotropic and inhomogeneous fluids : from simple models of rod- and disc-like particles to polypeptides." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/14620.

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A liquid crystal (LC) is a substance that exhibits phases intermediate between a crystal and a disordered liquid state. LCs have attracted longstanding research interest because of their potential commercial applications in opto-electronics, pharmaceuticals and surfactants but also because ordered soft matter is prevalent in bio-molecular systems such as DNA and lipid cell membranes. In liquid-crystalline systems, both molecular shape and asymmetric attractive interactions contribute to the formation and ultimate stability of anisotropic phases. The research outlined in this thesis provides a fundamental understanding of these systems by developing theoretical models and undertaking detailed molecular simulation studies. In the first part of this thesis, prototype oblate models for LCs are studied: cut spheres and cylindrical discs. Coupled with a scaled Onsager approach, a general equation of state (EoS) for hard-core discotic LCs is developed that allows for an accurate description of the isotropic and nematic phases of oblate discs by introducing a correction to incorporate the negative contributions from high-order virial coefficients. Combining the above mentioned approach with an extended cell approach, the isotropic-nematic-columnar phase diagram of cut spheres is determined. The accuracy of the EoS is assessed by comparison with the more traditional Parsons-Lee description and existing simulation data. Although the anisotropic athermal hard-body fluid is a reasonable representation of lyotropic or colloidal LCs, for thermotropic LC systems temperature plays a key role. In the second part of this thesis a model of hard-core particles incorporating additional anisotropic attractive interactions is proposed to describe thermotropic LCs. Based on a perturbation theory and the Onsager-Parsons-Lee approach, a van der Waals-type (meanfield level) theory of attractive hard-core particles is formulated in a compact algebraic form. The phase diagrams of model attractive prolate (spherocylinder) and oblate (cylindrical disc) molecules are calculated in order to examine the separate effects of molecular shape and anisotropic attractive interactions. As a practical example, a coarse-grained model comprising an attractive spherocylinder is employed to describe phase behaviour of solutions of the polypeptide poly-(γ-benzyl-L-glutamate) (PBLG) in dimethylformamide (DMF). Quantitative agreement between the results obtained from the EoS and experimental data is obtained. In the final part of the thesis, a detailed Monte Carlo (MC) simulation study of athermal mixtures of hard spherocylinders and hard spheres between two well separated parallel hard walls is performed. A combination of constant volume (canonical ensemble) and constant (normal) pressure (isobaric-isothermal ensemble) simulations are carried out. With these simulations, the bulk phase behaviour as well as surface-induced LC ordering are explored. The phase diagram of binary mixtures of hard spherocylinders and hard spheres is presented and is compared with the predictions of the one-fluid Parsons-Lee and many-fluid theories. Rich phase behaviour is exhibited on the surface of the walls: drying (de-wetting), isotropic wetting, and nematic wetting are all observed. A previously unreported entropy-driven transition from a bulk nematic state to a homeotropic smectic surface ordering (with particles arranged in a perpendicular orientation relative to the surface plane) is seen in for both the pure hard rod system and the mixture of hard rods and hard spheres as the density is increased (high pressure states).
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Hoang, Hai. "Modeling of Simple Fluids Confined in Slit Nanopores : Transport and Poromechanics." Thesis, Pau, 2013. http://www.theses.fr/2013PAUU3016/document.

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Ce travail vise à étudier les propriétés de transport et le comportement poromécaniquede fluides simples confinés dans des nanopores lamellaires par le biais de simulationsmoléculaires. Pour ce faire, nous avons proposé différents schémas de simulations de ladynamique moléculaire dans des ensembles adaptés aux propriétés étudiées (diffusion demasse, viscosité, force de friction, gonflement …). Il a été note que les propriétés de transportde fluides fortement inhomogènes variaient fortement dans la direction perpendiculaire auxmurs solides. Nous avons alors proposé une approche non-locale permettant de déterminerquantitativement la viscosité locale de fluides inhomogènes à partir du profil de densité etapplicable pour des sphères dures, molles et le fluide de Lennard-Jones. Il a été égalementmontré qu’un fluide de Lennard-Jones fortement confiné pouvait avoir un comportementviscoplastique (et rhéofluidifiant) si un ordre structurel était induit dans le fluide par laposition relative des murs solides. Enfin, nous avons montré qu’une modification importantede la pression de solvatation du fluide confiné peut être induite par cisaillement ce qui peutinduire un gonflement « dynamique » d’un nanopore lamellaire
This work aims at investigating the transport properties and the poromechanics of simple spherical fluids confined in slit nanopores through molecular simulations. To do so, we have proposed different schemes to perform molecular dynamics simulations in ensembles adequate to deal with the properties we were looking after (mass diffusion, shear viscosity,friction force, swelling …). The transport properties of strongly inhomogeneous fluids were found to be varying with space perpendicularly to the solid walls. We have then proposed a non-local approach to determine quantitatively the local shear viscosity of such inhomogeneous fluids from the density profile applicable from the Hard-Sphere to the Lennard-Jones fluids. In addition, it has been shown that highly confined Lennard-Jones fluid may exhibit a visco-plastic (+ shear thinning) behavior when a strong structural order is induced in the whole confined fluid because of the relative position of the solid walls. Finally, it was demonstrated that shear induced modifications of the solvation pressure of a confined fluid may exist that leads to a “dynamic” swelling when a slit micropore is sheared
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Kim, Kwangmoo. "Topics in the theory of inhomogeneous media composite superconductors and dielectrics /." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1180537980.

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Clotet, i. Fons Xavier. "Imbibition in a model open fracture. Capillary rise, kinetic roughening, and intermittent avalanche dynamics." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/284588.

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The dynamics of fractured media flows is relevant in many processes of interest that range from the micrometre to the kilometre lengthscales. Flow in disordered media has been proven to be an interesting system to study fundamental physics problems also. The goal of this Thesis is to study the spatio-temporal dynamics of the oil-air interface between displaced air and invading oil, in imbibition displacements through a model open fracture. The research combines exhaustive experimental work with accurate data analysis based on methods of nonlinear statistical physics. Imbibition is a process of fluid transport in a medium in which an invading fluid that preferentially wets the medium displaces the previously resident, immiscible fluid. According to the driving protocols we define spontaneous imbibition, in which the interface is driven at constant pressure difference between the inlet and the outlet of the medium and the flow rate is free to change in time, and forced-flow imbibition in which a constant flow rate of fluid is imposed at the inlet and the pressure difference may change in time. Our model open fracture consists of a Hele-Shaw (HS) cell, i.e. two parallel plates separated by a narrow gap spacing. Two configurations that mimic an open fracture have been explored: a flat HS cell, with constant aperture, and a HS cell with a dichotomic gap spacing randomly distributed in space (disordered cell). Silicone oils of different viscosities have been used as invading fluid. The advancement of the fluid front is recorded by using either CCD or CMOS cameras. An edge-tracking algorithm is applied to the binarized images to obtain front positions. We first study the evolution in time of the mean position of the interface in spontaneous imbibition experiments (capillary rise) through our two model open fractures. Experiments are performed with and without the presence of an effective gravity, achieved systematically tilting the cell against the advancement of the front or keeping it horizontal. Different pressure differences between the inlet and the outlet are systematically explored as well. We propose a new analytical solution for the spatially-averaged position of the imbibing front, based on a pressure balance equation, that reproduces experimental results at all times. In invasion of the disordered cell, capillary pressure and permeability variations distort imbibition fronts due to medium heterogeneities, while viscous pressure and surface tension tend to restore their flatness. As a result, the oil-air interface develops long-range correlations, with a lateral correlation length that depends on the capillary number Ca, tuned experimentally. Consequently, fronts advancing through the disordered cell are not flat during the whole experiment but get rough as the fluid penetrates the medium from an initially-flat interface to a final, statistically-invariant rough front. The kinetic roughening process, that occurs as a consequence of the competition of forces acting on the interface at different lengthscales, has been characterized in low-viscosity, forced-flow imbibition displacements obtaining a super-rough scaling scenario. The complex spatio-temporal dynamics of the front is studied at the statistically-stationary state of saturated front roughness in forced-flow experiments. We have analysed the spatial and temporal correlations of velocities of the front from the local scale, much smaller than the lateral correlation length and the characteristic length of the disorder, to the system size. Imbibition fronts exhibit burst-like dynamics, advancing by spatially-localized avalanches. These avalanches are power-law distributed in sizes and durations with exponential cutoffs. Power-law exponents are independent of the experimental conditions while the cutoffs diverge as Ca is reduced. We study also the intermittent character of these displacements by analysing different moments of the statistical distributions of velocity increments as a function of the time lag. We show that intermittency is controlled by two parameters only. The ensemble of results presented in this Thesis supports a very general picture of the nonequilibrium dynamics of slowly-driven fronts in open fractures. The lateral propagation of interfacial fluctuations is controlled by local mass conservation, through the lateral correlation length. The advancement of the interface in the direction of propagation is controlled by the characteristic extent of the disorder and by the mean front velocity.
L'objectiu de la tesi és l'estudi de la dinàmica espacio-temporal de la interfície entre aire desplaçat i oli invasor, en desplaçaments d'imbibició a través d'un model de fractura oberta. La recerca presentada combina un extens i exhaustiu treball experimental amb una anàlisi de dades acurada, basada en mètodes utilitzats en física estadística de no-equilibri. El procés d'imbibició, en que el fluid invasor mulla preferentment el medi envaït, és rellevant en diverses situacions d'interès, des de fluxos fisiològics a la irrigació del sòl i l'extracció de petroli. També és un sistema model interessant per a l'estudi de problemes de física fonamental degut a les correlacions de llarg abast que es desenvolupen al front, que indueixen una dinàmica complexa. Primer s'estudia l'avançament de la posició mitjana del front de fluid en condicions d'imbibició espontània (ascens capil•lar). Hem proposat una nova solució analítica que reprodueix els resultats experimentals tant amb presència de gravetat efectiva oposant-se a l'avançament del fluid com sense. En experiments d'imbibició forçada s'ha caracteritzat el procés d'arrugament dinàmic (kineticroughening) del front oli-aire a baixa viscositat. L'escenari d'escalament observat és super-rugós. Finalment s'ha estudiat la dinàmica del sistema en el règim estadísticament estacionari. S'han analitzat les correlacions temporals i espacials de les velocitats des de l'escala local, per sota la mida de les heterogeneïtats del desordre, fins a la mida del sistema. El front mostra una dinàmica a batzegades caracteritzada en termes d'allaus. Les mides i durades d'aquestes allaus estan distribuïdes estadísticament en llei de potències, amb exponents independents de les condicions experimentals, amb un truncament exponencial, que divergeix en reduir el nombre de capil•laritat. La intermitència del senyal s'ha quantificat i se n'ha extret els dos paràmetres que la controlen. El conjunt de resultats presentats en aquesta tesi dóna suport a una descripció molt general de la dinàmica de propagació lenta de fronts d'imbibició fora de l'equilibri en fractura oberta. La conservació local de massa controla la correlació lateral de les fluctuacions de la interfície. La longitud característica de les illes de desordre i la velocitat mitjana del front, per la seva banda, controlen l'avançament del front en la direcció de propagació.
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Calleja, Mark. "Simulation and density functional theory of simple inhomogeneous liquids." Thesis, University of Kent, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314605.

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Books on the topic "Inhomogeneous fluids"

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Transport theory of inhomogeneous fluids. Singapore: World Scientific, 1994.

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Caviglia, Giacomo. Inhomogeneous waves in solids and fluids. Singapore: World Scientific, 1992.

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Koh, K. W. An analysis of inhomogeneously filled rectangular wave fluids. Manchester: UMIST, 1993.

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Collective modes in inhomogeneous plasma: Kinetic and advanced fluid theory. Bristol: Institute of Physics, 2000.

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IUTAM Symposium (2002 University of Texas at Austin). Micromechanics of fluid suspensions and solid composites: Papers of a theme issue. London: The Royal Society, 2003.

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Rheology of particulate dispersions and composites. Boca Raton, FL: CRC Press, 2007.

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Leszczyński, Jacek Sławomir. Dyskretny model dynamiki zderzeń ziaren w przepływach materiałów granulowanych. Częstochowa: Wydawnictwa Politechniki Częstochowskiej, 2005.

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IUTAM Symposium on Segregation in Granular Flows (1999 Cape May, N.J.). IUTAM Symposium on Segregation in Granular Flows: Proceedings of the IUTAM Symposium held in Cape May, NJ, U.S.A., June 5-10, 1999. Dordrecht: Kluwer Academic Publishers, 2000.

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Allen, Michael P., and Dominic J. Tildesley. Inhomogeneous fluids. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198803195.003.0014.

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In this chapter, the special techniques needed to simulate and calculate properties for inhomogeneous systems are presented. The estimation of surface properties, such as the interfacial tension, may be accomplished by a variety of methods, including the calculation of the stress tensor profiles, the change in the potential energy on scaling the surface area at constant volume, the observation of equilibrium capillary wave fluctuations, or direct free energy measurement by cleaving. The structure within the interface is also of interest, and ways of quantifying this are described. Practical issues such as system size, preparation of a two-phase system, and equilibration time, are discussed. Special application areas, such as liquid drops, fluid membranes, and liquid crystals, are described.
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1934-, Henderson Douglas, ed. Fundamentals of inhomogeneous fluids. New York: M. Dekker, 1992.

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Book chapters on the topic "Inhomogeneous fluids"

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Schick, Michael. "Theories of Equilibrium Inhomogeneous Fluids." In Physics of Biological Membranes, 125–40. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00630-3_5.

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Henderson, Douglas. "Integral Equations for Inhomogeneous Fluids." In Condensed Matter Theories, 427–33. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2934-7_37.

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Harnau, Ludger, and Siegfried Dietrich. "Inhomogeneous Platelet and Rod Fluids." In Soft Matter, 159–60. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2014. http://dx.doi.org/10.1002/9783527682300.ch4.

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Kusaka, Isamu. "Statistical Mechanics of Inhomogeneous Fluids." In Statistical Mechanics for Engineers, 259–308. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13809-1_7.

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Pierce, Allan D. "The inhomogeneous wave equation of thermoacoustics." In Flow of Real Fluids, 92–100. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/3-540-15989-4_74.

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Lado, F., and E. Lomba. "Inhomogeneous Fluids in an External Field." In New Approaches to Problems in Liquid State Theory, 279–91. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4564-0_14.

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Ashcroft, N. W. "Inhomogeneous Fluids and the Freezing Transition." In NATO ASI Series, 581–623. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-9975-0_24.

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Khodja, Farid Ammar, and Marcelo M. Santos. "2d Ladyzhenskaya-Solonnikov Problem for Inhomogeneous Fluids." In Progress in Nonlinear Differential Equations and Their Applications, 351–64. Basel: Birkhäuser Basel, 2005. http://dx.doi.org/10.1007/3-7643-7401-2_23.

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Spencer, A. J. M., P. Watson, and T. G. Rogers. "Stress and deformation in moderately anisotropic inhomogeneous elastic plates." In Theoretical, Experimental, and Numerical Contributions to the Mechanics of Fluids and Solids, 225–44. Basel: Birkhäuser Basel, 1995. http://dx.doi.org/10.1007/978-3-0348-9229-2_13.

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Garrett, Steven L. "Radiation and Scattering." In Understanding Acoustics, 543–620. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44787-8_12.

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Abstract At this point, we have made a rather extensive investigation into the sounds that excite Helmholtz resonators as well as the departures from equilibrium that propagate as plane waves through uniform or inhomogeneous media. We have not, as yet, dealt with how those sounds are actually produced in fluids. Our experience tells us that sound can be generated by vibrating objects (e.g., loudspeaker cones, stringed musical instruments, drums, bells), by modulated or unstable flows (e.g., jet engine exhaust, whistles, fog horns, speech), by electrical discharges in the atmosphere (i.e., thunder), or by optical absorption (e.g., modulated laser beams). In this chapter, we will develop the perspective and tools that will be used for the calculation of the radiation efficiency of various sources and combinations of sources, like the sound reinforcement system shown in Fig. 12.1.
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Conference papers on the topic "Inhomogeneous fluids"

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Ammar-Khodja, Farid, and Marcelo M. Santos. "The Leray problem for 2D inhomogeneous fluids." In Regularity and Other Aspects of the Navier-Stokes Equation. Warsaw: Institute of Mathematics Polish Academy of Sciences, 2005. http://dx.doi.org/10.4064/bc70-0-3.

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Zabusky, Norman. "Visiometrics for reduced modeling of accelerated inhomogeneous flows." In Fluids 2000 Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2000. http://dx.doi.org/10.2514/6.2000-2412.

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Gupta, Ajay, and Christos N. Markides. "TURBULENT INHOMOGENEOUS AUTOIGNITION OF POLYDISPERSED N-HEPTANE DROPLETS: AN EXPERIMENTAL STUDY." In Second Thermal and Fluids Engineering Conference. Connecticut: Begellhouse, 2017. http://dx.doi.org/10.1615/tfec2017.cbe.018106.

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Kawaharada, Noritsune, Daisaku Sakaguchi, Keisuke Komada, Hironobu Ueki, and Masahiro Ishida. "Inhomogeneous Structure in High-Speed and High-Number-Density Sprays." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-11001.

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A L2F (Laser 2-Focus velocimeter) was applied for the measurements of the velocity and size of droplets in diesel fuel sprays. The micro-scale probe of the L2F has an advantage in avoiding the multiple scattering from droplets in a dense region of fuel sprays. A data sampling rate of 15MHz has been achieved in the L2F system for detecting almost all of the droplets which passed through the measurement probe. Diesel fuel was injected into the atmosphere by using a common rail injector. Measurement positions were located in the planes 15, 20, and 25 mm apart from the injector nozzle exit. Measurement result showed that the integral time scale of turbulence in size was nearly the same as the one in frequency. And the integral time scale of turbulence in velocity was about two times larger than the time scale of size and frequency.
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Iida, Oaki, and Yosuke Aono. "Effects of System Rotation on Disturbances Injected Into Laminar Flow." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-25598.

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Effects of system rotation are investigated on inhomogeneous flow where disturbances are transported from turbulent to non-turbulent flow field through advection and turbulent diffusion. With the body force on the fringe region, spectral method is used for inhomogeneous flow which is stirred at the bottom of the cuboid computational box. As a result, it is found that inertial waves with a constant helicity are transmitted in the direction perpendicular to the stirred surface, and parallel to rotational axis. In this study, the effects of system rotation on generation and propagation of wave are discussed.
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Yuen, Walter W. "Development of a Multiple Absorption Coefficient Zonal Method (MACZM) for Application to Radiative Heat Transfer in Multi-Dimensional Inhomogeneous Non-Gray Media." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56285.

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The formulation of a multiple absorption coefficient zonal method (MACZM) is presented. The method can be directly applied to a fine-grid finite-difference or finite-element computation and is thus an effective approach to generate accurate assessment of the importance of radiative heat transfer in multi-dimensional inhomogeneous, non-gray media. The feasibility of the method is demonstrated by calculating the radiative exchange between a high temperature (∼3000 K) molten nuclear fuel (UO2) and water (with a large variation in absorption coefficient from the visible to the infrared) in a highly 3-D and inhomogeneous environment simulating the premixing phase of a steam explosion.
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Gerolymos, Georges A., and Isabelle Vallet. "Contribution to Single-Point-Closure Reynolds-Stress Modelling of Inhomogeneous Flows." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45346.

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The purpose of this paper is to present recent advances on the development of fully single-point-closure Reynolds-stress models, for flows with strong inhomogeneities, such as solid-wall effects or strong streamwise gradients (eg. shockwave/turbulent-boundary-layer-interaction). As a starting point it is shown that several recently developed wall-normal-free (wall-topology-free) RSMs, using gradients of turbulence length-scale and of anisotropy-invariants to replace geometric normals, can be interpreted as a generalization of well-known redistribution closures but with coefficients that are not scalars but fourth-order tensors. These tensorial coefficients are function of anisotropy-invariants and of their gradients (which indicate the direction of inhomogeneity). In view of the above result, it is suggested that the theory of the redistribution tensor closure should be revisited, with emphasis on inhomogeneity effects. Four baseline sets of coefficient values are given, and the proposed models are applied for various flows (developing flow in a square duct, 2-D and 3-D separated flows).
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Sharif, M., and Z. Yousaf. "Causes of Inhomogeneous Energy Density in Relativistic Fluids with f(R) Background." In 14th Regional Conference on Mathematical Physics. WORLD SCIENTIFIC, 2018. http://dx.doi.org/10.1142/9789813224971_0009.

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Druault, Philippe, Abbas Hekmati, and Denis Ricot. "On the Use of POD for Identifying Acoustic and Turbulent Components of an Inhomogeneous Wall Pressure Field." In ASME 2013 Fluids Engineering Division Summer Meeting. ASME, 2013. http://dx.doi.org/10.1115/fedsm2013-16381.

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Godin, Oleg A. "An exact wave equation for sound in inhomogeneous, moving, and non-stationary fluids." In OCEANS 2011. IEEE, 2011. http://dx.doi.org/10.23919/oceans.2011.6106920.

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Reports on the topic "Inhomogeneous fluids"

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Zhong, S., and J. C. Doran. An experimental and numerical study of the modifications of mixed-layer structure by inhomogeneous surface fluxes and secondary circulations. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/10170304.

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