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Articles de revues sur le sujet « Medium gravity »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

Cembranos, José A. R., Mario Coma Díaz, and Prado Martín-Moruno. "Modified gravity as a diagravitational medium." Physics Letters B 788 (January 2019): 336–40. http://dx.doi.org/10.1016/j.physletb.2018.10.068.

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Fakir, Redouane. "The Interstellar Medium as a Gravity Wave Detector." International Journal of Modern Physics D 06, no. 01 (1997): 49–56. http://dx.doi.org/10.1142/s0218271897000042.

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An observer, situated several thousand light-years away from a radio pulsar, finds himself embedded in the diffraction pattern resulting from the propagation of the radio waves through the irregular interstellar medium. The gravity waves produced by an intervening binary star cause the diffraction pattern to be displaced laterally in a manner familiar from refractive interstellar scintillation, except that this gravity wave effect is not dispersive. This periodic displacement can reach a few hundred kilometers. Thus, there seems to be a possibility that the exceedingly faint gravity waves can

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3

LYLE, SARAH, HERBERT E. HUPPERT, MARK HALLWORTH, MIKE BICKLE, and ANDY CHADWICK. "Axisymmetric gravity currents in a porous medium." Journal of Fluid Mechanics 543, no. -1 (2005): 293. http://dx.doi.org/10.1017/s0022112005006713.

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Dolgunin, V. N., V. Ya Borshchev, and P. A. Ivanov. "Rapid Gravity Flow of a Granular Medium." Theoretical Foundations of Chemical Engineering 39, no. 5 (2005): 548–54. http://dx.doi.org/10.1007/s11236-005-0115-3.

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5

Willigenburg, L. Gerard Van, and Willem L. De Koning. "Medium and Waves Clarifying Fundamental Physics." Physical Science International Journal 27, no. 4 (2023): 85–93. http://dx.doi.org/10.9734/psij/2023/v27i4799.

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Although quantum theory, relativity and gravity provide excellent predictions of observations in their corresponding domains, a qualitative understanding of these three pillars of fundamental physics and their connection, is still very much lacking. As shown in this paper, by considering a medium (ether) in three-dimensional Euclidean space, representing potential energy, and waves in this medium representing all physical objects and phenomena, all three can be much better connected and understood. All waves move with the velocity of light c which is only approximately constant because it is a

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Sennerby-Forsse, Lisbeth. "Clonal variation of wood specific gravity, moisture content, and stem bark percentage in 1-year-old shoots of 20 fast-growing Salix clones." Canadian Journal of Forest Research 15, no. 3 (1985): 531–34. http://dx.doi.org/10.1139/x85-087.

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Specific gravity, moisture content of the wood, and stem bark percentages in 1-year-old shoots of 20 Salix (L.) clones originating from natural and artificial stands in Sweden were measured for 3 years. Clones were classified into three groups with high, medium, and low specific gravity. Ranking stability for specific gravity was high. Moisture content and bark percentage fluctuated considerably from one year to another but showed a slight increase from the high to the medium and low specific gravity groups.

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Zhu, Yiqing, and F. Benjamin Zhan. "Medium-Term Earthquake Forecast Using Gravity Monitoring Data: Evidence from the Yutian and Wenchuan Earthquakes in China." International Journal of Geophysics 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/307517.

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Gravity changes derived from regional gravity monitoring data in China from 1998 to 2005 exhibited noticeable variations before the occurrence of two large earthquakes in 2008 in China—the 2008 Yutian (Xinjiang)Ms=7.3earthquake and the 2008 Wenchuan (Sichuan)Ms=8.0earthquake. Based on these gravity variations, a group of researchers at the Second Crust Monitoring and Application Center of China Earthquake Administration made a suggestion in December of 2006 that the possibility for the Yutian (Xinjiang) and Wenchuan (Sichuan) areas to experience a large earthquake in either 2007 or 2008 was hi

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Aketi, Veera AK, TR Vakamalla, M. Narasimha, GE Sreedhar, R. Shivakumar, and RajanKumar. "Computational Fluid Dynamic study on the effect of near gravity material on dense medium cyclone treating coal using Discrete Phase Model and Algebraic Slip mixture multiphase model." Journal of Computational Multiphase Flows 9, no. 2 (2016): 58–70. http://dx.doi.org/10.1177/1757482x16677755.

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In this paper, the effect of near gravity material at desired separation density during the coal washing is studied. It is believed that the Dense Medium Separation of coal particles in the presence of high percentage of near gravity material, results in a significant misplacement of coal particles to wrong products. However the performance of dense medium cyclone does not merely depend on the total amount of near gravity materials but also on their distribution as well as on their quality. This paper deals with numerical simulation of magnetite medium segregation and coal partitioning handled

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Bhadauria, Beer S., Atul K. Srivastava, Nirmal C. Sacheti, and Pallath Chandran. "Gravity Modulation of Thermal Instability in a Viscoelastic Fluid Saturated Anisotropic Porous Medium." Zeitschrift für Naturforschung A 67, no. 1-2 (2012): 1–9. http://dx.doi.org/10.5560/zna.2011-0045.

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The present paper deals with a thermal instability problem in a viscoelastic fluid saturating an anisotropic porous medium under gravity modulation. To find the gravity modulation effect, the gravity field is considered in two parts: a constant part and an externally imposed time-dependent periodic part. The time-dependent part of the gravity field, which can be realized by shaking the fluid, has been represented by a sinusoidal function. Using Hill’s equation and the Floquet theory, the convective threshold has been obtained. It is found that gravity modulation can significantly affect the st

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10

Elhag, S. H., and F. S. Bayones. "Effect of Rotation, Gravity, Primary Stress and Magnetic Field on Shear Waves Spreading in an Anisotropic Incompressible Sandy Elastic Medium." Journal of Computational and Theoretical Nanoscience 16, no. 11 (2019): 4443–54. http://dx.doi.org/10.1166/jctn.2019.8610.

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In this paper, we investigated the spreading of shear wave in an anisotropic non-homogeneous elastic medium under effect of dry sand, rotation, gravity, primary stress, and magnetic field. We have reached equation of variation of shear wave velocity c1 in an anisotropic incompressible medium according to sand, rotation, gravity, primary stress, and magnetic field, then we used graphs to illustrate to show the effect of direction of spreading of shear wave. The results indicate that the effect of dry sand, rotation, gravity, primary stress, and magnetic field on the spreading of shear wave in a

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11

Biswas, P. K., P. R. Sengupta, and Lokenath Debnath. "Axisymmetric Lamb's problem in a semi-infinite micropolar viscoelastic medium." International Journal of Mathematics and Mathematical Sciences 19, no. 4 (1996): 815–20. http://dx.doi.org/10.1155/s0161171296001135.

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A study is made of the axisymmetric problem of wave propagation under the influence of gravity in a micropolar viscoelastic semi-infinite medium when a time varying axisymmetric loading is applied on the surface of the medium. Special attention is given to the effects of gravity which induces a kind of initial stress of a hydrostatic nature on the wave propagation.

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12

WOODS, ANDREW W. "Vaporizing gravity currents in a superheated porous medium." Journal of Fluid Mechanics 377 (December 25, 1998): 151–68. http://dx.doi.org/10.1017/s0022112098003012.

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We analyse the motion of a current of water migrating under gravity into a hot vapour-saturated porous rock accounting for the vaporization which occurs as the water invades the hot rock. We present a series of similarity solutions to describe the rate of advance of both planar and axisymmetric currents when the total mass of water injected after time t is proportional to tγ. Three distinct cases arise. When γ>1/2 (planar) or γ>1 (axisymmetric), the depth of the current increases at all points from the source, and therefore vaporization occurs at all points on its surface. This case is d

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13

Ryazhskikh, V. I., and Yu V. Chernukhin. "Steady-state gravity flow of a granular medium." Theoretical Foundations of Chemical Engineering 34, no. 5 (2000): 500–501. http://dx.doi.org/10.1007/bf02827396.

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Kuipers, M., and A. A. F. van de Ven. "Rayleight-gravity waves in a heavy elastic medium." Acta Mechanica 81, no. 3-4 (1990): 181–90. http://dx.doi.org/10.1007/bf01176985.

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RUITH, MICHAEL, and ECKART MEIBURG. "Miscible rectilinear displacements with gravity override. Part 1. Homogeneous porous medium." Journal of Fluid Mechanics 420 (October 10, 2000): 225–57. http://dx.doi.org/10.1017/s0022112000001543.

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Rectilinear homogeneous miscible displacements with gravity override are analysed by means of direct numerical simulations on the basis of the vorticity–streamfunction formulation of the governing equations. The vorticity-based point of view offers the advantage of clearly attributing the dominant flow characteristics to the effects of viscosity contrast, density difference, impermeable boundary conditions, or interactions among the above. Basic considerations regarding the vorticity field show that in an integral sense the coupling between viscosity and gravity vorticity is predominantly one

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Aggarwal, A. K., and D. Dixit. "Effect of Suspended Particles on Thermosolutal Convection of Rivlin-Ericksen Fluid in Porous Medium with Variable Gravity." International Journal of Applied Mechanics and Engineering 23, no. 3 (2018): 813–20. http://dx.doi.org/10.2478/ijame-2018-0045.

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Abstract The thermosolutal stability of a layer of the Rivlin-Ericksen fluid in a porous medium is considered under varying gravity conditions. It is found that for stationary convection, medium permeability and suspended particles have a destabilizing/stabilizing effect when gravity increases/decreases. The stable solute gradient has a stabilizing effect on the system.

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17

Philatov, Vladimir, Lubov Boltnova, and Ksenya Vandysheva. "Generalization of study experience of Ural ore deposits by method of tectonophysical analysis gravitational field." E3S Web of Conferences 177 (2020): 02001. http://dx.doi.org/10.1051/e3sconf/202017702001.

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Gravity is important in the history of Earth 's formation and evolution. Gravitational accretion, gravitational differentiation of Earth matter by density. Gravitational accretion, gravity differentiation of the Earth 's substance in density, its movement and other processes deform the Earth 's crust, contribute to the formation in it of different scale, shape and metallogenical specialization of plicative and disjunctive structures, with which genetically and spatially related deposits of different minerals. The link between gravity and deformation of the geological medium is its density inho

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18

D.Shivaranjani*, P. Venkateswara Rao E.Venkata Kishore M. Madhu Naik B. Triveni. "PRODUCTION OF WINE FROM INDIAN STAR GOOSE BERRY AND A COMPARATIVE STUDY OVER GRAPE WINE." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 05 (2018): 4784–90. https://doi.org/10.5281/zenodo.1279410.

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<em>Wine is one of the functional fermented foods that have many health benefits. Commercially, wine is produced by the fermentation of yeast which involves the conversion of sugar to alcohol. Wine can act as a nutrient supplement for seasonal fruits and vegetables throughout the year. Using fruits and vegetables having medicinal and nutritional value as a substrate for wine production, the health benefits of them can be improved widely. Indian gooseberrywhich is known for their high medicinal and nutritional values are used as the substrate here. Fermentation is carried out with Saccharomyces

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19

Othman, Mohamed I. A., and Montaser Fekry. "Effect of rotation and gravity on generalized thermo-viscoelastic medium with voids." Multidiscipline Modeling in Materials and Structures 14, no. 2 (2018): 322–38. http://dx.doi.org/10.1108/mmms-08-2017-0082.

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PurposeThe purpose of this paper is to study the effect of rotation and gravity on a homogeneous, isotropic, and generalized thermo-viscoelastic material with voids. The problem is studied in the context of the coupled theory, Lord-Shulman theory with one relaxation time, and Green-Lindsay theory with two relaxation times.Design/methodology/approachThe analytical method used was the normal mode analysis technique.FindingsNumerical results for the physical quantities were analyzed and presented graphically. The graphical results indicated that the effects of rotation and gravity were observable

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20

Gupta, Asit Kumar, and Pulak Patra. "Influence of gravity on torsional surface waves in a dissipative medium." Geofísica Internacional 60, no. 1 (2021): 1–13. http://dx.doi.org/10.22201/igeof.00167169p.2021.60.1.1916.

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The present paper deals with the possibilities of propagation of torsional surface waves in a viscoelastic medium under gravity field. During the study it will observe that the increase in gravity parameter will increase the velocity of the wave, the increase in viscoelastic parameter, decrease the velocity of the wave until the product of angular frequency and viscoelastic parameter is less than unity. It also notes that as the velocity increases, the curve becomes asymptotic in nature when the period of oscillation increases. In fact the maximum damping in velocity has been identified at thi

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21

Füglistaler, A., and D. Pfenniger. "Solid H2 in the interstellar medium." Astronomy & Astrophysics 613 (May 2018): A64. http://dx.doi.org/10.1051/0004-6361/201731739.

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Context. Condensation of H2 in the interstellar medium (ISM) has long been seen as a possibility, either by deposition on dust grains or thanks to a phase transition combined with self-gravity. H2 condensation might explain the observed low efficiency of star formation and might help to hide baryons in spiral galaxies. Aims. Our aim is to quantify the solid fraction of H2 in the ISM due to a phase transition including self-gravity for different densities and temperatures in order to use the results in more complex simulations of the ISM as subgrid physics. Methods. We used molecular dynamics s

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22

SPANNUTH, MELISSA J., JEROME A. NEUFELD, J. S. WETTLAUFER, and M. GRAE WORSTER. "Axisymmetric viscous gravity currents flowing over a porous medium." Journal of Fluid Mechanics 622 (March 10, 2009): 135–44. http://dx.doi.org/10.1017/s0022112008005223.

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We study the axisymmetric propagation of a viscous gravity current over a deep porous medium into which it also drains. A model for the propagation and drainage of the current is developed and solved numerically in the case of constant input from a point source. In this case, a steady state is possible in which drainage balances the input, and we present analytical expressions for the resulting steady profile and radial extent. We demonstrate good agreement between our experiments, which use a bed of vertically aligned tubes as the porous medium, and the theoretically predicted evolution and s

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Naumov, Dmitry V., Alexander V. Kurkov, Svetlana I. Anufrieva, Igor V. Cheprasov, and Nikolai T. Vorogushin. "Assessment of physical methods of enrichment of poor spodumene-containing ore tailings." Transactions of the Kоla Science Centre of RAS. Series: Engineering Sciences 1, no. 1/2023 (2023): 188–91. http://dx.doi.org/10.37614/2949-1215.2023.14.1.033.

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The results of the material composition of the initial sample of Zavitinskoye deposit tailings and technological research by physical methods of enrichment are presented: dry gravity enrichment (Sepair technology); coarse lump, heavy medium enrichment; dry magnetic separation; gravity enrichment methods. The prospects of heavy-medium enrichment for obtaining spodumene 6% (Li2O) concentrate are shown. An enlarged calculation of the cost of processing 1 million tons of tailings is given.

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Abbas, Amir, Ioannis E. Sarris, Muhammad Ashraf, Kaouther Ghachem, Nidhal Hnaien, and Badr M. Alshammari. "The Effects of Reduced Gravity and Radiative Heat Transfer on the Magnetohydrodynamic Flow Past a Non-Rotating Stationary Sphere Surrounded by a Porous Medium." Symmetry 15, no. 4 (2023): 806. http://dx.doi.org/10.3390/sym15040806.

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In the present study, the effects of reduced gravity and solar radiation on the magnetohydrodynamics (MHD) fluid flow and heat transfer past a solid and stationary sphere embedded in a porous medium are investigated. A model describing the considered configuration is put in dimensionless form using appropriate dimensionless variables and then transformed to primitive form for a smooth algorithm on a computing tool. A primitive form of the model is solved by employing the finite difference method. Solutions for variables of interest, such as velocity distribution and temperature field, along wi

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Senin, Nor Halawati, Nor Fadzillah Mohd Mokhtar, and Mohamad Hasan Abdul Sathar. "Ferroconvection in an Anisotropic Porous Medium with Variable Gravity." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 71, no. 2 (2020): 56–68. http://dx.doi.org/10.37934/arfmts.71.2.5668.

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Lingevitch, Joseph F., Michael D. Collins, and William L. Siegmann. "Modeling internal gravity waves in a range‐dependent medium." Journal of the Acoustical Society of America 100, no. 4 (1996): 2614. http://dx.doi.org/10.1121/1.417665.

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PRITCHARD, DAVID. "Gravity currents over fractured substrates in a porous medium." Journal of Fluid Mechanics 584 (July 25, 2007): 415–31. http://dx.doi.org/10.1017/s0022112007006623.

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We consider the behaviour of a gravity current in a porous medium when the horizontal surface along which it spreads is punctuated either by narrow fractures or by permeable regions of limited extent. We derive steady-state solutions for the current, and show that these form part of a long-time asymptotic description which may also include a self-similar ‘leakage current’ propagating beyond the fractured region with a length proportional to t1/2. We discuss the conditions under which a current can be completely trapped by a permeable region or a series of fractures.

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Bayones, Fatimah S., and Nahed S. Hussien. "Fibre-Reinforced Generalized Thermoelastic Medium Subjected to Gravity Field." Journal of Modern Physics 06, no. 08 (2015): 1113–34. http://dx.doi.org/10.4236/jmp.2015.68116.

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Schiller, S., G. M. Tino, P. Gill, et al. "Einstein Gravity Explorer–a medium-class fundamental physics mission." Experimental Astronomy 23, no. 2 (2008): 573–610. http://dx.doi.org/10.1007/s10686-008-9126-5.

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LIANG, Jun, Hong YUAN, and Weixing WAN. "MEDIUM-SCALE GUIDED GRAVITY WAVESSUPPORTED BY THE BACKGROUND WINDS." Chinese Journal of Space Science 19, no. 4 (1999): 327. http://dx.doi.org/10.11728/cjss1999.04.327.

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BOLSTER, DIOGO, ALICE HANG, and P. F. LINDEN. "The front speed of intrusions into a continuously stratified medium." Journal of Fluid Mechanics 594 (December 14, 2007): 369–77. http://dx.doi.org/10.1017/s0022112007008993.

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This paper examines intrusive Boussinesq gravity currents, propagating into a continuously stratified fluid. We develop a model, based on energy arguments, to predict the front speed of such an intrusive gravity current from a lock release. We find that the depth at which the intrusion occurs, which corresponds to the level of neutral buoyancy (i.e. the depth where the intrusion density equals the stratified fluid density), affects the front speed. The maximum speeds occur when the intrusion travels along the top and bottom boundaries and the minimum speed occurs at mid-depth. Experiments and

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Chand, R., G. C. Rana, and S. Kumar. "Variable Gravity Effects on Thermal Instability of Nanofluid in Anisotropic Porous Medium." International Journal of Applied Mechanics and Engineering 18, no. 3 (2013): 631–42. http://dx.doi.org/10.2478/ijame-2013-0038.

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Abstract In this paper, we study the effects of variable gravity on thermal instability in a horizontal layer of a nanofluid in an anisotropic porous medium. Darcy model been used for the porous medium. Also, it incorporates the effect of Brownian motion along with thermophoresis. The normal mode technique is used to find the confinement between two free boundaries. The expression of the Rayleigh number has been derived, and the effects of variable gravity and anisotropic parameters on the Rayleigh number have been presented graphically

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Sethi, Munish, Manisha Gupta, Kishan Chand Gupta, Mahinder Singh Saroa, and Deepak Gupta. "Surface waves in fibre-reinforced anisotropic solid elastic media under the influence of gravity." Journal of the Mechanical Behaviour of Materials 20, no. 4-6 (2012): 81–85. http://dx.doi.org/10.1515/jmbm.2011.017.

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AbstractThe aim of the present article is to investigate the surface waves in anisotropic, elastic solid medium under the influence of gravity. The theory of generalised surface waves has first been developed and then used to investigate particular cases of waves, viz., Stoneley, Rayleigh, and Love. The wave velocity equations have been obtained for different cases and are in well agreement with the corresponding classical result, when the effect of gravity, viscosity, and fibre-reinforced parameters of the material medium are ignored.

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GOLDING, MADELEINE J., and HERBERT E. HUPPERT. "The effect of confining impermeable boundaries on gravity currents in a porous medium." Journal of Fluid Mechanics 649 (April 13, 2010): 1–17. http://dx.doi.org/10.1017/s0022112009993223.

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The effect of confining boundaries on gravity currents in porous media is investigated theoretically and experimentally. Similarity solutions are derived for currents when the volume increases as tα in horizontal channels of uniform cross-section with boundary height b satisfying b ~ a|y/a|n, where y is the cross-channel coordinate and a is a length scale of the channel width. Experiments were carried out in V-shaped and semicircular channels for the case of gravity currents with constant volume (α=0) and constant flux (α=1). These showed generally good agreement with the theory.Typically, we

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Y. H., Gangadharaiah, Suma S. P, and Ananda K. "VARIABLE GRAVITY FIELD AND THROUGHFLOW EFFECTS ON PENETRATIVE CONVECTION IN A POROUS LAYER." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 5, no. 3 (2013): 172–91. http://dx.doi.org/10.24297/ijct.v5i3.3519.

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The effect of vertical throughflow and variable gravity field on the onset of penetrative convection simulated via internal heating in a porous medium is studied. Flow in the porous medium is governed by Forchheimer-extended Darcy equation. The boundaries are considered to be rigid, however permeable, and insulated to temperature perturbations. The eigen value problem is solved using a regular perturbation technique with wave number as a perturbation parameter. The variable gravity parameter, the direction of throughflow and the presence of volumetric internal heat source in a porous layer pla

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Ahmed, S. M. "Stoneley waves in a non-homogeneous orthotropic granular medium under the influence of gravity." International Journal of Mathematics and Mathematical Sciences 2005, no. 19 (2005): 3145–55. http://dx.doi.org/10.1155/ijmms.2005.3145.

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The aim of this paper is to investigate the Stoneley waves in a non-homogeneous orthotropic granular medium under the influence of a gravity field. The frequency equation obtained, in the form of a sixth-order determinantal expression, is in agreement with the corresponding result when both media are elastic. The frequency equation when the gravity field is neglected has been deduced as a particular case.

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Kavyashree, Kavyashree, Rudrappa Arunkumar, Subramanya Raghavendra, Bhaskar Chola, and Mohammed Fareeduddin. "Effect of Variable Gravity and Internal Heat Source Strength on Marangoni-Benard Ferroconvection in a Saturated Porous Medium." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 132, no. 1 (2025): 102–13. https://doi.org/10.37934/arfmts.132.1.102113.

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The effect of gravity modulation via internal heating on the onset of Marangoni-Bénard ferroconvection in MNFs in a saturated porous medium is investigated theoretically. The upper boundary, which is free, considered flat and undeformable, and the lower boundary is assumed to be rigid. Upper and lower boundaries are protected perfectly to temperature perturbations. The higher-order Galerkin approach is used to derive the crucial stability parameters quantitatively. It is inferred that the internal heat source strength and gravity modulation have considerable influence on the onset of ferroconv

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Sethi, M., K. C. Gupta, and D. Gupta And Manisha. "Surface Waves in Fibre-Reinforced Anisotropic Solid Elastic Media under the Influence of Gravity." International Journal of Applied Mechanics and Engineering 18, no. 1 (2013): 177–88. http://dx.doi.org/10.2478/ijame-2013-0012.

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The aim of the present paper is to investigate surface waves in an anisotropic, elastic solid medium under the influence of gravity. First, a theory of generalised surface waves was developed and then it was employed to investigate particular cases of waves, viz., Stoneley and Rayleigh, Love type. The wave velocity equations were obtained for different cases and they are in well agreement with the corresponding classical result, when the effect of gravity, viscosity as well as parameters for fibre-reinforcement of the material medium are ignored.

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Aggarwal, A. K., and D. Dixit. "Triple Diffusive Convection of a Non-Newtonian Fluid Under the Combined Effect of Compressibility and Variable Gravity." International Journal of Applied Mechanics and Engineering 24, no. 4 (2019): 1–11. http://dx.doi.org/10.2478/ijame-2019-0046.

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Abstract In this paper, triple diffusive convection in a Rivlin-Ericksen fluid layer, which is permeated with suspended particles in the porous medium under the effect of compressibility and variable gravity, is investigated. Linear stability theory and normal mode analysis have been used to study the problem under consideration. It is observed that, for stationary convection, suspended particles, compressibility and medium permeability have destabilizing/stabilizing effects under certain conditions. The variable gravity parameter destabilizes the system whereas stable solute gradients have a

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Kango, S. K., G. C. Rana, and Ramesh Chand. "TRIPLE-DIFFUSIVE CONVECTION IN WALTERS’ (MODEL B’) FLUID WITH VARYING GRAVITY FIELD SATURATING A POROUS MEDIUM." Studia Geotechnica et Mechanica 35, no. 3 (2013): 45–56. http://dx.doi.org/10.2478/sgem-2013-0029.

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Abstract The Triple-Diffusive convection in Walters’ (Model B') fluid with varying gravity field is considered in the presence of uniform vertical magnetic field in porous medium. For the case of stationary convection, the magnetic field, varying gravity field and the stable solute gradients have stabilizing effects whereas the medium permeability has destabilizing (or stabilizing) effect on the system under certain conditions. A linear stability analysis theory and normal mode analysis method have been carried out to study the onset convection. The kinematic viscoelasticity has no effect on t

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Taylor, M. J., P. D. Pautet, A. F. Medeiros, et al. "Characteristics of mesospheric gravity waves near the magnetic equator, Brazil, during the SpreadFEx campaign." Annales Geophysicae 27, no. 2 (2009): 461–72. http://dx.doi.org/10.5194/angeo-27-461-2009.

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Abstract. As part of the SpreadFEx campaign, coordinated optical and radio measurements were made from Brazil to investigate the occurrence and properties of equatorial Spread F, and to characterize the regional mesospheric gravity wave field. All-sky image measurements were made from two sites: Brasilia and Cariri located ~10° S of the magnetic equator and separated by ~1500 km. In particular, the observations from Brasilia provided key data in relatively close proximity to expected convective sources of the gravity waves. High-quality image measurements of the mesospheric OH emission and the

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Dolgunin, Viktor N., Oleg O. Ivanov, and Sergey A. Akopyan. "Transversal mass transfer and shear stress formation during rapid gravity flow of a granular medium." Image Journal of Advanced Materials and Technologies 6, no. 3 (2021): 204–15. http://dx.doi.org/10.17277/jamt.2021.03.pp.204-215.

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The micro structural models for shear stress generation during rapid gravity flow of granular materials on a rough chute are discussed. The mechanism of the shear stress formation, taking into account the tangential impulse formed under transversal mass transfer of particles, is suggested. The analogy between granular media during rapid shear deformation and dense gases is used to develop the suggested mechanism on the basis of kinetic theory. The total shear stress is determined as the sum of the stress components induced by collisions, transversal mass transfer and contact interactions of un

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Zhang, Li Hua, Li Xin Zhang, and Su Zhen Cheng. "Stability Analysis of Gravity Dam on Soil Foundation." Applied Mechanics and Materials 501-504 (January 2014): 79–82. http://dx.doi.org/10.4028/www.scientific.net/amm.501-504.79.

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For small and medium sized water conservancy project, gravity dam on soil foundation is a comparatively economic and reasonable dam structure. Based on project case, the author discusses in this paper the seepage-proofing and anti-sliding stability of the gravity dam on soil foundation, focusing on calculation of anti-sliding stability of deep stratum, selection of soil pressure and effective measures for improving the anti-sliding stability of the gravity dam on soil foundation.

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Agullo, Ivan, Adrian del Rio, and Jose Navarro-Salas. "Gravity and handedness of photons." International Journal of Modern Physics D 26, no. 12 (2017): 1742001. http://dx.doi.org/10.1142/s0218271817420019.

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Vacuum fluctuations of quantum fields are altered in the presence of a strong gravitational background, with important physical consequences. We argue that a nontrivial spacetime geometry can act as an optically active medium for quantum electromagnetic radiation, in such a way that the state of polarization of radiation changes in time, even in the absence of electromagnetic sources. This is a quantum effect, and is a consequence of an anomaly related to the classical invariance under electric-magnetic duality rotations in Maxwell theory.

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Xie, Haojun, Aifen Li, Zhaoqin Huang, Bo Gao, and Ruigang Peng. "Coupling of two-phase flow in fractured-vuggy reservoir with filling medium." Open Physics 15, no. 1 (2017): 12–17. http://dx.doi.org/10.1515/phys-2017-0002.

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AbstractCaves in fractured-vuggy reservoir usually contain lots of filling medium, so the two-phase flow in formations is the coupling of free flow and porous flow, and that usually leads to low oil recovery. Considering geological interpretation results, the physical filled cave models with different filling mediums are designed. Through physical experiment, the displacement mechanism between un-filled areas and the filling medium was studied. Based on the experiment model, we built a mathematical model of laminar two-phase coupling flow considering wettability of the porous media. The free f

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Dolgunin, V. N., O. O. Ivanov, and S. A. Akopyan. "Quasithermal Effects During Rapid Gravity Flow of a Granular Medium." Advanced Materials & Technologies, no. 3(19) (2020): 047–55. http://dx.doi.org/10.17277/amt.2020.03.pp.047-055.

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The investigation results of granular temperature during rapid gravity flow of granular medium on a rough chute are discussed. The granular temperature is determined as the kinetic energy of several forms of mutual displacements of particles. The influence of the chute angle on the value ratio of different components of granular temperature is analyzed. The components of granular temperature induced by fluctuation, shear and transversal mutual displacements of particles were taken into account.

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Barsky, E. M. "Medium Motion Modes and Universal Curves for Gravity Separation Processes." Refractories and Industrial Ceramics 62, no. 1 (2021): 11–14. http://dx.doi.org/10.1007/s11148-021-00553-0.

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Bulatov, V. V., and Yu V. Vladimirov. "Asymptotical analysis of internal gravity wave dynamics in stratified medium." Applied Mathematical Sciences 8 (2014): 217–40. http://dx.doi.org/10.12988/ams.2014.311637.

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VELLA, DOMINIC, and HERBERT E. HUPPERT. "Gravity currents in a porous medium at an inclined plane." Journal of Fluid Mechanics 555 (May 2006): 353. http://dx.doi.org/10.1017/s0022112006009578.

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Fan, Tianguang, and Jill S. Buckley. "Rapid and Accurate SARA Analysis of Medium Gravity Crude Oils." Energy & Fuels 16, no. 6 (2002): 1571–75. http://dx.doi.org/10.1021/ef0201228.

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