Log in

Relevant bibliographies by topics / Marangoni-convection / Journal articles

To see the other types of publications on this topic, follow the link: Marangoni-convection.

Journal articles on the topic 'Marangoni-convection'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Marangoni-convection.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Buyevich, Yu A., L. M. Rabinovich, and A. V. Vyazmin. "Chemo-Marangoni Convection." Journal of Colloid and Interface Science 157, no. 1 (April 1993): 202–10. http://dx.doi.org/10.1006/jcis.1993.1177.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Buyevich, Yu A., L. M. Rabinovich, and A. V. Vyazmin. "Chemo-Marangoni Convection." Journal of Colloid and Interface Science 157, no. 1 (April 1993): 211–18. http://dx.doi.org/10.1006/jcis.1993.1178.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Rabinovich, L. M., A. V. Vyazmin, and Yu A. Buyevich. "Chemo-Marangoni Convection." Journal of Colloid and Interface Science 173, no. 1 (July 1995): 1–7. http://dx.doi.org/10.1006/jcis.1995.1289.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Wagner, Alfred. "Nonstationary Marangoni convection." Applicationes Mathematicae 26, no. 2 (1999): 195–220. http://dx.doi.org/10.4064/am-26-2-195-220.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

BOECK, THOMAS, and ANDRÉ THESS. "Inertial Bénard–Marangoni convection." Journal of Fluid Mechanics 350 (November 10, 1997): 149–75. http://dx.doi.org/10.1017/s0022112097006782.

Full text

Abstract:

Two-dimensional surface-tension-driven Bénard convection in a layer with a free-slip bottom is investigated in the limit of small Prandtl number using accurate numerical simulations with a pseudospectral method complemented by linear stability analysis and a perturbation method. It is found that the system attains a steady state consisting of counter-rotating convection rolls. Upon increasing the Marangoni number Ma the system experiences a transition between two typical convective regimes. The first one is the regime of weak convection characterized by only slight deviations of the isotherms from the linear conductive temperature profile. In contrast, the second regime, called inertial convection, shows significantly deformed isotherms. The transition between the two regimes becomes increasingly sharp as the Prandtl number is reduced. For sufficiently small Prandtl number the transition from weak to inertial convection proceeds via a subcritical bifurcation involving weak hysteresis. In the viscous zero-Prandtl-number limit the transition manifests itself in an unbounded growth of the flow amplitude for Marangoni numbers beyond a critical value Mai. For Ma<Mai the zero-Prandtl-number equations provide a reasonable approximation for weak convection at small but finite Prandtl number. The possibility of experimental verification of inertial Bénard–Marangoni convection is briefly discussed.

APA, Harvard, Vancouver, ISO, and other styles

6

Riahi, N. "Nonlinear Benard-Marangoni Convection." Journal of the Physical Society of Japan 56, no. 10 (October 15, 1987): 3515–24. http://dx.doi.org/10.1143/jpsj.56.3515.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

IIDA, Seiichi. "Microgravity and Marangoni Convection." Journal of the Japan Society for Aeronautical and Space Sciences 45, no. 525 (1997): 543–52. http://dx.doi.org/10.2322/jjsass1969.45.543.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Haga, Masakazu, Tsuyoshi Kondo, and Takayuki Hamauchi. "Experimental and Numerical Analyses of the Flow and Temperature of Buoyancy-Marangoni Convection in a Liquid." Applied Mechanics and Materials 880 (March 2018): 27–32. http://dx.doi.org/10.4028/www.scientific.net/amm.880.27.

Full text

Abstract:

Flow patterns and temperature distributions of buoyancy–Marangoni convection in a liquid were analyzed both experimentally and theoretically. We focused on two-dimensional natural convection in a horizontal liquid layer. In the experiment, silicone oil (with a viscosity of 1 × 10−5 m2/s) was used as a test liquid and the temperature and velocity fields were visualized using liquid crystal capsules. The visualization experiment included cases of both steady flow and oscillatory flow. In the case of a deep liquid layer, an oscillatory flow with repeated acceleration and deceleration occurred due to the interaction of the buoyancy convection and the Marangoni convection; however, this did not occur when the liquid layer was shallow. In the numerical calculation, the governing equations of buoyancy–Marangoni convection were solved using a finite difference method. The numerical calculation results demonstrate that the position of the downward flow due to buoyancy convection was changed by the Marangoni convection, which agreed with the experimental result.

APA, Harvard, Vancouver, ISO, and other styles

9

Chen, Jie, Ai Wu Zeng, and Li Ming Yu. "Linear Stability Analysis of Marangoni Effect on Desorption Liquid Layer." Advanced Materials Research 479-481 (February 2012): 1380–86. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.1380.

Full text

Abstract:

Stability of static liquid layer in mass transfer process accompanied by concentration-driven Marangoni effect was modeled and analyzed by utilizing the linear stability theory. The critical condition of the onset of the Marangoni convection was obtained. It is found that the liquid layer becomes more unstable with the increase of the Schmidt number, and it becomes the most volatile when the Biot number is about 0.85. The critical time to mark the onset of Marangoni convection can be predicted with the established model. The research results show that the concentration gradient is the main factor to initiate the Marangoni convection.

APA, Harvard, Vancouver, ISO, and other styles

10

GOLOVIN, A. A., A. A. NEPOMNYASHCHY, and L. M. PISMEN. "Nonlinear evolution and secondary instabilities of Marangoni convection in a liquid–gas system with deformable interface." Journal of Fluid Mechanics 341 (June 25, 1997): 317–41. http://dx.doi.org/10.1017/s0022112097005582.

Full text

Abstract:

The paper presents a theory of nonlinear evolution and secondary instabilities in Marangoni (surface-tension-driven) convection in a two-layer liquid–gas system with a deformable interface, heated from below. The theory takes into account the motion and convective heat transfer both in the liquid and in the gas layers. A system of nonlinear evolution equations is derived that describes a general case of slow long-scale evolution of a short-scale hexagonal Marangoni convection pattern near the onset of convection, coupled with a long-scale deformational Marangoni instability. Two cases are considered: (i) when interfacial deformations are negligible; and (ii) when they lead to a specific secondary instability of the hexagonal convection.In case (i), the extent of the subcritical region of the hexagonal Marangoni convection, the type of the hexagonal convection cells, selection of convection patterns – hexagons, rolls and squares – and transitions between them are studied, and the effect of convection in the gas phase is also investigated. Theoretical predictions are compared with experimental observations.In case (ii), the interaction between the short-scale hexagonal convection and the long-scale deformational instability, when both modes of Marangoni convection are excited, is studied. It is shown that the short-scale convection suppresses the deformational instability. The latter can appear as a secondary long-scale instability of the short-scale hexagonal convection pattern. This secondary instability is shown to be either monotonic or oscillatory, the latter leading to the excitation of deformational waves, propagating along the short-scale hexagonal convection pattern and modulating its amplitude.

APA, Harvard, Vancouver, ISO, and other styles

11

TANIGAWA, Hirofumi, Hidekazu KOSHINO, and Takashi MASUOKA. "Marangoni Convection in Porous Layer." Proceedings of the JSME annual meeting 2000.4 (2000): 441–42. http://dx.doi.org/10.1299/jsmemecjo.2000.4.0_441.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Sun, Z. F., and K. T. Yu. "Rayleigh–Bénard–Marangoni Cellular Convection." Chemical Engineering Research and Design 84, no. 3 (March 2006): 185–91. http://dx.doi.org/10.1205/cherd.05057.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Bayazitoglu, Y., and T. T. Lam. "Marangoni Convection in Radiating Fluids." Journal of Heat Transfer 109, no. 3 (August 1, 1987): 717–21. http://dx.doi.org/10.1115/1.3248148.

Full text

Abstract:

The onset of Marangoni convection driven by surface tension gradients in radiating fluid layers is studied. The system considered consists of a fluid layer of infinite horizontal extent which is confined between a free upper surface and a rigid isothermal lower surface. The radiative boundaries of black–black, mirror–mirror, and black–mirror are considered. The critical conditions leading to the onset of convective fluid motions in a microgravity environment are determined numerically by linear stability theory. The perturbation equations are solved as a Bolza problem in the calculus of variations. The results are presented in terms of the critical Marangoni number and optical thickness for a wide range of some radiative parameters, including the Planck number, nongrayness of the fluid, and the emissivity of the boundaries. It is found that radiation suppresses Marangoni convection during material processing in space.

APA, Harvard, Vancouver, ISO, and other styles

14

Bau, Haim H. "Control of Marangoni–Bénard convection." International Journal of Heat and Mass Transfer 42, no. 7 (April 1999): 1327–41. http://dx.doi.org/10.1016/s0017-9310(98)00234-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Bhattacharjee, Jayanta K. "Marangoni convection in binary liquids." Physical Review E 50, no. 2 (August 1, 1994): 1198–205. http://dx.doi.org/10.1103/physreve.50.1198.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Warmuziński, Krzysztof, and Marek Tańczyk. "On doubly diffusive Marangoni convection." Chemical Engineering Science 50, no. 22 (November 1995): 3521–24. http://dx.doi.org/10.1016/0009-2509(95)00198-e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Cramer, A., S. Landgraf, E. Beyer, and G. Gerbeth. "Marangoni convection in molten salts." Experiments in Fluids 50, no. 2 (August 7, 2010): 479–90. http://dx.doi.org/10.1007/s00348-010-0951-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Subramanian, Pravin, Abdelfattah Zebib, and Barry McQuillan. "Axisymmetric Marangoni convection in microencapsulation." Acta Astronautica 57, no. 2-8 (July 2005): 97–103. http://dx.doi.org/10.1016/j.actaastro.2005.03.018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Khan, M. Ijaz, Yu-Ming Chu, Faris Alzahrani, and Aatef Hobiny. "Analysis of Buongiorno’s nanofluid model in marangoni convective flow with gyrotactic microorganism and activation energy." International Journal of Modern Physics C 32, no. 06 (February 18, 2021): 2150072. http://dx.doi.org/10.1142/s0129183121500728.

Full text

Abstract:

This communication is to analyze the Marangoni convection MHD flow of nanofluid. Marangoni convection is very useful physical phenomena in presence of microgravity conditions which is generated by gradient of surface tension at interface. We have also studied the swimming of migratory gyrotactic microorganisms in nanofluid. Flow is due to rotation of disk. Heat and mass transfer equations are examined in detail in the presence of heat source sink and Joule heating. Nonlinear mixed convection effect is inserted in momentum equation. Appropriate transformations are applied to find system of equation. HAM technique is used for convergence of equations. Radial and axial velocities, concentration, temperature, motile microorganism profile, Nusselt number and Sherwood number are sketched against important parameters. Marangoni ratio parameter and Marangoni number are increasing functions of axial and radial velocities. Temperature rises for Marangoni number and heat source sink parameter. Activation energy and chemical reaction rate parameter have opposite impact on concentration profile. Motile density profile decays via Peclet number and Schmidt number. Magnitude of Nusselt number enhances via Marangoni ratio parameter.

APA, Harvard, Vancouver, ISO, and other styles

20

Manjunatha, N., R. Sumithra, and R. K. Vanishree. "Darcy-Benard double diffusive Marangoni convection in a composite layer system with constant heat source along with non uniform temperature gradients." Malaysian Journal of Fundamental and Applied Sciences 17, no. 1 (February 27, 2021): 7–15. http://dx.doi.org/10.11113/mjfas.v17n1.1984.

Full text

Abstract:

The problem of Benard double diffusive Marangoni convection is investigated in a horizontally infinite composite layer system enclosed by adiabatic boundaries for Darcy model. This composite layer is subjected to three temperature gradients with constant heat sources in both the layers. The lower boundary of the porous region is rigid and upper boundary of the fluid region is free with Marangoni effects. The Eigenvalue problem of a system of ordinary differential equations is solved in closed form for the Thermal Marangoni number, which happens to be the Eigen value. The three different temperature profiles considered are linear, parabolic and inverted parabolic profiles with the corresponding thermal Marangoni numbers are obtained. The impact of the porous parameter, modified internal Rayleigh number, solute Marangoni number, solute diffusivity ratio and the diffusivity ratio on Darcy-Benard double diffusive Marangoni convection are investigated in detail.

APA, Harvard, Vancouver, ISO, and other styles

21

BOECK, THOMAS, and ANDRÉ THESS. "Bénard–Marangoni convection at low Prandtl number." Journal of Fluid Mechanics 399 (November 25, 1999): 251–75. http://dx.doi.org/10.1017/s0022112099006436.

Full text

Abstract:

Surface-tension-driven Bénard convection in low-Prandtl-number fluids is studied by means of direct numerical simulation. The flow is computed in a three-dimensional rectangular domain with periodic boundary conditions in both horizontal directions and either a free-slip or no-slip bottom wall using a pseudospectral Fourier–Chebyshev discretization. Deformations of the free surface are neglected. The smallest possible domain compatible with the hexagonal flow structure at the linear stability threshold is selected. As the Marangoni number is increased from the critical value for instability of the quiescent state to approximately twice this value, the initially stationary hexagonal convection pattern becomes quickly time-dependent and eventually reaches a state of spatio-temporal chaos. No qualitative difference is observed between the zero-Prandtl-number limit and a finite Prandtl number corresponding to liquid sodium. This indicates that the zero-Prandtl-number limit provides a reasonable approximation for the prediction of low-Prandtl-number convection. For a free-slip bottom wall, the flow always remains three-dimensional. For the no-slip wall, two-dimensional solutions are observed in some interval of Marangoni numbers. Beyond the Marangoni number for onset of inertial convection in two-dimensional simulations, the convective flow becomes strongly intermittent because of the interplay of the flywheel effect and three-dimensional instabilities of the two-dimensional rolls. The velocity field in this intermittent regime is characterized by the occurrence of very small vortices at the free surface which form as a result of vortex stretching processes. Similar structures were found with the free-slip bottom at slightly smaller Marangoni number. These observations demonstrate that a high numerical resolution is necessary even at moderate Marangoni numbers in order to properly capture the small-scale dynamics of Marangoni convection at low Prandtl numbers.

APA, Harvard, Vancouver, ISO, and other styles

22

Mahmud, M. N., R. Idris, and I. Hashim. "Effects of Magnetic Field and Nonlinear Temperature Profile on Marangoni Convection in Micropolar Fluid." Differential Equations and Nonlinear Mechanics 2009 (2009): 1–11. http://dx.doi.org/10.1155/2009/748794.

Full text

Abstract:

The combined effects of a uniform vertical magnetic field and a nonuniform basic temperature profile on the onset of steady Marangoni convection in a horizontal layer of micropolar fluid are studied. The closed-form expression for the Marangoni numberMfor the onset of convection, valid for polynomial-type basic temperature profiles upto a third order, is obtained by the use of the single-term Galerkin technique. The critical conditions for the onset of convection have been presented graphically.

APA, Harvard, Vancouver, ISO, and other styles

23

Xu, Chun Long, Yong Chao Shi, Xiao Xing Jin, Zuo Sheng Lei, Yun Bo Zhong, and Jia Hong Guo. "Numerical Study of Marangoni Convection around a Single Vapor Bubble during Pool Boiling." Applied Mechanics and Materials 624 (August 2014): 262–66. http://dx.doi.org/10.4028/www.scientific.net/amm.624.262.

Full text

Abstract:

Boiling is known to be a very efficient mode of heat transfer in earth gravity, however, in microgravity bubble behavior is different because the buoyancy effects are replaced by surface tension effects such as Marangoni convection. The modeling of nucleate boiling with the effect of Marangoni convection in 0 g is accomplished by using Phase Field Method. Numerical simulation is carried out of single nucleating vapor bubble on a heated wall with and without Marangoni convection. The results show that the flow field consists of a major vortex that recirculates colder fluid from the upper region, pulling it toward the hot surface to the point where the bubble meets the heated surface. This type of flow pattern has been observed in various experiments.

APA, Harvard, Vancouver, ISO, and other styles

24

Yang, Xuegeng, Dominik Baczyzmalski, Christian Cierpka, Gerd Mutschke, and Kerstin Eckert. "Marangoni convection at electrogenerated hydrogen bubbles." Physical Chemistry Chemical Physics 20, no. 17 (2018): 11542–48. http://dx.doi.org/10.1039/c8cp01050a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Klein, H., B. Braun, C. Ikier, and D. Woermann. "Phase separation induced by Marangoni convection." Advances in Space Research 22, no. 8 (January 1998): 1245–48. http://dx.doi.org/10.1016/s0273-1177(98)00155-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Palanques-Mestre, August. "A marangoni-convection-driven chaotic flow." Nonlinear Analysis: Theory, Methods & Applications 30, no. 6 (December 1997): 3785–94. http://dx.doi.org/10.1016/s0362-546x(96)00349-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Marchant, T. R., and N. F. Smyth. "Pulse evolution for marangoni-bénard convection." Mathematical and Computer Modelling 28, no. 10 (November 1998): 45–58. http://dx.doi.org/10.1016/s0895-7177(98)00154-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Denniston, Colin, and J. M. Yeomans. "Diffuse interface simulation of Marangoni convection." Physical Chemistry Chemical Physics 1, no. 9 (1999): 2157–61. http://dx.doi.org/10.1039/a809628g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

McCaughan, F., and H. Bedir. "Marangoni Convection With a Deformable Surface." Journal of Applied Mechanics 61, no. 3 (September 1, 1994): 681–88. http://dx.doi.org/10.1115/1.2901514.

Full text

Abstract:

Double diffusive convection is considered in a semi-infinite domain, bounded below by a solid surface and above by a gas interface. Temperature and concentration gradients are imposed normal to the free surface and the linear stability of the fluid is examined. Traditional analyses are extended to include the effects of a deformable free surface. The governing equations are nondimensionalized and the parameter groupings are identified. We particularly focus on the effects of the capillary number, the Nusselt number and the Marangoni temperature and concentration numbers.

APA, Harvard, Vancouver, ISO, and other styles

30

Maroto, J. A., V. Pérez-Muñuzuri, and M. S. Romero-Cano. "Introductory analysis of Bénard–Marangoni convection." European Journal of Physics 28, no. 2 (February 9, 2007): 311–20. http://dx.doi.org/10.1088/0143-0807/28/2/016.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Krmpotić, D., G. B. Mindlin, and C. Pérez-García. "Bénard-Marangoni convection in square containers." Physical Review E 54, no. 4 (October 1, 1996): 3609–13. http://dx.doi.org/10.1103/physreve.54.3609.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Chen, Y., S. A. David, T. Zacharia, and C. J. Cremers. "MARANGONI CONVECTION WITH TWO FREE SURFACES." Numerical Heat Transfer, Part A: Applications 33, no. 6 (May 1998): 599–620. http://dx.doi.org/10.1080/10407789808913957.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Cerisier, P., C. Perez-Garcia, C. Jamond, and J. Pantaloni. "Wavelength selection in Bénard-Marangoni convection." Physical Review A 35, no. 4 (February 1, 1987): 1949–52. http://dx.doi.org/10.1103/physreva.35.1949.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Trouette, Benoît, Eric Chénier, Frédéric Doumenc, Claudine Delcarte, and Béatrice Guerrier. "Transient Rayleigh-Bénard-Marangoni solutal convection." Physics of Fluids 24, no. 7 (July 2012): 074108. http://dx.doi.org/10.1063/1.4733439.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Das, Kausik S., and Jayanta K. Bhattacharjee. "Marangoni convection on an inhomogeneous substrate." Physical Review E 59, no. 5 (May 1, 1999): 5407–11. http://dx.doi.org/10.1103/physreve.59.5407.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Cerisier, P., R. Occelli, C. Pérez-Garcia, and C. Jamond. "Structural disorder in Benard-Marangoni convection." Journal de Physique 48, no. 4 (1987): 569–76. http://dx.doi.org/10.1051/jphys:01987004804056900.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Hoogstraten, H. W., H. C. J. Hoefsloot, and L. P. B. M. Janssen. "Marangoni convection in V-shaped containers." Journal of Engineering Mathematics 26, no. 1 (February 1992): 21–37. http://dx.doi.org/10.1007/bf00043223.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Bestehorn, Michael. "Square Patterns in Bénard-Marangoni Convection." Physical Review Letters 76, no. 1 (January 1, 1996): 46–49. http://dx.doi.org/10.1103/physrevlett.76.46.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

BESTEHORN, MICHAEL. "PATTERN SELECTION IN BÉNARD-MARANGONI CONVECTION." International Journal of Bifurcation and Chaos 04, no. 05 (October 1994): 1085–94. http://dx.doi.org/10.1142/s0218127494000794.

Full text

Abstract:

Pattern formation in fluids with a free flat upper surface is examined. On that surface, the Marangoni effect provides an additional instability mechanism. Based on amplitude equations it is shown that phase instabilities confine the region of stable hexagons to a narrow band of wavelengths. On the other hand we developed a numerical scheme that allows for a direct integration of the fully three-dimensional hydrodynamic equations. There we show the evolution of random patterns and the creation and stabilization of defects as well as the instability of hexagonal patterns lying outside the stable band of wave vectors.

APA, Harvard, Vancouver, ISO, and other styles

40

Vakulenko, Sergey, and Ivan Sudakov. "Complex bifurcations in Bénard–Marangoni convection." Journal of Physics A: Mathematical and Theoretical 49, no. 42 (September 26, 2016): 424001. http://dx.doi.org/10.1088/1751-8113/49/42/424001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Jiménez-Fernández, Javier, and Javier García-Sanz. "Surface deflection in benard-marangoni convection." Physics Letters A 141, no. 3-4 (October 1989): 161–64. http://dx.doi.org/10.1016/0375-9601(89)90780-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Chamkha, A. J., I. Pop, and H. S. Takhar. "Marangoni Mixed Convection Boundary Layer Flow." Meccanica 41, no. 2 (April 2006): 219–32. http://dx.doi.org/10.1007/s11012-005-3352-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Bauer, H. F., and A. Buchholz. "Marangoni convection in a rectangular container." Forschung im Ingenieurwesen 63, no. 11-12 (April 1998): 339–48. http://dx.doi.org/10.1007/pl00010754.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Agampodi Mendis, Radeesha Laknath, Atsushi Sekimoto, Yasunori Okano, Hisashi Minakuchi, and Sadik Dost. "The Relative Contribution of Solutal Marangoni Convection to Thermal Marangoni Flow Instabilities in a Liquid Bridge of Smaller Aspect Ratios under Zero Gravity." Crystals 11, no. 2 (January 26, 2021): 116. http://dx.doi.org/10.3390/cryst11020116.

Full text

Abstract:

The effect of solutal Marangoni convection on flow instabilities in the presence of thermal Marangoni convection in a Si-Ge liquid bridge with different aspect ratios As has been investigated by three-dimensional (3D) numerical simulations under zero gravity. We consider a half-zone model of a liquid bridge between a cold (top plane) and a hot (bottom plane) disks. The highest Si concentration is on the top of the liquid bridge. The aspect ratio (As) drastically affects the critical Marangoni numbers: the critical solutal Marangoni number (under small thermal Marangoni numbers (MaTAs≲1800)) has the same dependence on As as the critical thermal Marangoni number (under small solutal Marangoni numbers (400≲MaCAs≲800)), i.e., it decreases with increasing As. The azimuthal wavenumber of the traveling wave mode increases as decreasing As, i.e., larger azimuthal wavenumbers (m=6,7,11,12, and 13) appear for As=0.25, and only m=2 appears when As is one and larger. The oscillatory modes of the hydro waves have been extracted as the spatiotemporal structures by using dynamic mode decomposition (DMD). The present study suggests a proper parameter region of quiescent steady flow suitable for crystal growth for smaller aspect ratios of the liquid bridge.

APA, Harvard, Vancouver, ISO, and other styles

45

Menke, C. "Bifurcations of Numerically Simulated Marangoni Flows in Floating Zones." International Journal of Bifurcation and Chaos 07, no. 06 (June 1997): 1295–305. http://dx.doi.org/10.1142/s0218127497001035.

Full text

Abstract:

Marangoni or thermocapillary convection in a two-dimensional cylindrical half zone configuration under microgravity is studied numerically. The time-dependent simulations take into account convection and conduction in the melt, heat transfer between the melt and the ambient, and deformations of the free melt/gas surface of the half zone. A modified Marker and Cell (MAC) method is used to compute the flow and the temperature fields. The algorithm is applied especially to silicon melts. Above a critical temperature difference in the melt, the steady state becomes unstable and oscillatory thermocapillary convection occurs. The relevant control parameter for the onset of oscillations is the Marangoni number. As the Marangoni number increases, the phenomenon of period doubling is observed in the simulations. After a sequence of period doubling bifurcations, the flow becomes turbulent.

APA, Harvard, Vancouver, ISO, and other styles

46

Boeck, Thomas. "Bénard–Marangoni convection at large Marangoni numbers: Results of numerical simulations." Advances in Space Research 36, no. 1 (January 2005): 4–10. http://dx.doi.org/10.1016/j.asr.2005.02.083.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Xia, Dan, Bin Shi Xu, Yao Hui Lv, Yi Jiang, and Cun Long Liu. "Effect of Marangoni Convection on Welding Pool of Plasma Direct Metal Forming Finite Element Model." Materials Science Forum 704-705 (December 2011): 674–79. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.674.

Full text

Abstract:

With considering the Marangoni convection in the molten pool on plasma direct metal forming process, a finite element model posed to describe and reflect the flow in the molten pool. Results of temperature distribution modeling prepared by plasma direct metal forming process of metal powders in an Ar environment were numerically obtained and compared with experimental data. Powders of Fe314 and base plates of R235 steel were taken as sample materials. In the experiment a multi-stream nozzle capable of delivering metal powder coaxially with the plasma arc was used. The model revealed that the velosity of the front part of the pool is a little slower than aft part. Marangoni convection reinforced the convection and enhanced the heat transfer. Profile of the model is the same as the experimental data. This allows us to conclude that the model can be applied for preselecting the process parameters. Keywords: plasma, rapid forming, temperature field, Marangoni convection.

APA, Harvard, Vancouver, ISO, and other styles

48

Hashim, Ishak. "On competition between modes at the onset of Bénard-Marangoni convection in a layer of fluid." ANZIAM Journal 43, no. 3 (January 2002): 387–95. http://dx.doi.org/10.1017/s144618110001258x.

Full text

Abstract:

AbstractIn this paper we use classical linear stability theory to analyse the onset of steady and oscillatory Bénard-Marangoni convection in a horizontal layer of fluid in the more physically-relevant case when both the non-dimensional Rayleigh and Marangoni numbers are linearly dependent. We present examples of situations in which there is competition between modes at the onset of convection when the layer is heated from below.

APA, Harvard, Vancouver, ISO, and other styles

49

BERGEON, A., D. HENRY, H. BENHADID, and L. S. TUCKERMAN. "Marangoni convection in binary mixtures with Soret effect." Journal of Fluid Mechanics 375 (November 25, 1998): 143–77. http://dx.doi.org/10.1017/s0022112098002614.

Full text

Abstract:

Marangoni convection in a differentially heated binary mixture is studied numerically by continuation. The fluid is subject to the Soret effect and is contained in a two-dimensional small-aspect-ratio rectangular cavity with one undeformable free surface. Either or both of the temperature and concentration gradients may be destabilizing; all three possibilities are considered. A spectral-element time-stepping code is adapted to calculate bifurcation points and solution branches via Newton's method. Linear thresholds are compared to those obtained for a pure fluid. It is found that for large enough Soret coefficient, convection is initiated predominantly by solutal effects and leads to a single large roll. Computed bifurcation diagrams show a marked transition from a weakly convective Soret regime to a strongly convective Marangoni regime when the threshold for pure fluid thermal convection is passed. The presence of many secondary bifurcations means that the mode of convection at the onset of instability is often observed only over a small range of Marangoni number. In particular, two-roll states with up-flow at the centre succeed one-roll states via a well-defined sequence of bifurcations. When convection is oscillatory at onset, the limit cycle is quickly destroyed by a global (infinite-period) bifurcation leading to subcritical steady convection.

APA, Harvard, Vancouver, ISO, and other styles

50

Palizdan, Sepideh, Jassem Abbasi, Masoud Riazi, and Mohammad Reza Malayeri. "Impact of solutal Marangoni convection on oil recovery during chemical flooding." Petroleum Science 17, no. 5 (April 24, 2020): 1298–317. http://dx.doi.org/10.1007/s12182-020-00451-z.

Full text

Abstract:

Abstract In this study, the impacts of solutal Marangoni phenomenon on multiphase flow in static and micromodel geometries have experimentally been studied and the interactions between oil droplet and two different alkaline solutions (i.e. MgSO4 and Na2CO3) were investigated. The static tests revealed that the Marangoni convection exists in the presence of the alkaline and oil which should carefully be considered in porous media. In the micromodel experiments, observations showed that in the MgSO4 flooding, the fluids stayed almost stationary, while in the Na2CO3 flooding, a spontaneous movement was detected. The changes in the distribution of fluids showed that the circular movement of fluids due to the Marangoni effects can be effective in draining of the unswept regions. The dimensional analysis for possible mechanisms showed that the viscous, gravity and diffusion forces were negligible and the other mechanisms such as capillary and Marangoni effects should be considered in the investigated experiments. The value of the new defined Marangoni/capillary dimensionless number for the Na2CO3 solution was orders of magnitude larger than the MgSO4 flooding scenario which explains the differences between the two cases and also between different micromodel regions. In conclusion, the Marangoni convection is activated by creating an ultra-low IFT condition in multiphase flow problems that can be profoundly effective in increasing the phase mixing and microscopic efficiency.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!