Pattern study of thermal phase separation for binary fluid mixtures
Purpose - The purpose of this paper is to present numerical results about phase separation of binary fluid mixtures quenched by contact with cold walls. Design/methodology/approach - The thermal phase separation is simulated by using a hybrid lattice Boltzmann method that solves the continuity and t...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/99648 http://hdl.handle.net/10220/25678 |
| _version_ | 1826122406318571520 |
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| author | Tiribocchi, Adriano Piscitelli, Antonio Gonnella, Giuseppe Lamura, Antonio |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Tiribocchi, Adriano Piscitelli, Antonio Gonnella, Giuseppe Lamura, Antonio |
| author_sort | Tiribocchi, Adriano |
| collection | NTU |
| description | Purpose - The purpose of this paper is to present numerical results about phase separation of binary fluid mixtures quenched by contact with cold walls. Design/methodology/approach - The thermal phase separation is simulated by using a hybrid lattice Boltzmann method that solves the continuity and the Navier-Stokes equations. The equations for energy and concentration are solved by using a finite-difference scheme. This approach provides a complete description of the thermo-hydrodynamic effects in the mixture. Findings - A rich variety of domain patterns are found depending on the viscosity and on the heat conductivity of the mixture. Ordered lamellar structures are observed at high viscosity while domains rounded in shape dominate the phase separation at low viscosity, where two scales characterize the growth of domains. Research limitations/implications - The present approach provides a numerical method that can be extended to other systems such as liquid-vapor or lamellar systems. Moreover, a three-dimensional study can give a complete picture of thermo-hydrodynamic effects. Originality/value - This paper provides a consistent thermodynamic theoretical framework for a binary fluid mixture and a numerically stable method to simulate them. |
| first_indexed | 2024-10-01T05:47:58Z |
| format | Journal Article |
| id | ntu-10356/99648 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:47:58Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/996482020-03-07T12:34:48Z Pattern study of thermal phase separation for binary fluid mixtures Tiribocchi, Adriano Piscitelli, Antonio Gonnella, Giuseppe Lamura, Antonio School of Physical and Mathematical Sciences DRNTU::Science::Physics::Heat and thermodynamics Purpose - The purpose of this paper is to present numerical results about phase separation of binary fluid mixtures quenched by contact with cold walls. Design/methodology/approach - The thermal phase separation is simulated by using a hybrid lattice Boltzmann method that solves the continuity and the Navier-Stokes equations. The equations for energy and concentration are solved by using a finite-difference scheme. This approach provides a complete description of the thermo-hydrodynamic effects in the mixture. Findings - A rich variety of domain patterns are found depending on the viscosity and on the heat conductivity of the mixture. Ordered lamellar structures are observed at high viscosity while domains rounded in shape dominate the phase separation at low viscosity, where two scales characterize the growth of domains. Research limitations/implications - The present approach provides a numerical method that can be extended to other systems such as liquid-vapor or lamellar systems. Moreover, a three-dimensional study can give a complete picture of thermo-hydrodynamic effects. Originality/value - This paper provides a consistent thermodynamic theoretical framework for a binary fluid mixture and a numerically stable method to simulate them. 2015-05-26T06:43:10Z 2019-12-06T20:09:49Z 2015-05-26T06:43:10Z 2019-12-06T20:09:49Z 2011 2011 Journal Article Tiribocchi, A., Piscitelli, A., Gonnella, G., & Lamura, A. (2011). Pattern study of thermal phase separation for binary fluid mixtures. International journal of numerical methods for heat & fluid flow, 21(5), 572-583. 0961-5539 https://hdl.handle.net/10356/99648 http://hdl.handle.net/10220/25678 10.1108/09615531111135837 186356 en International journal of numerical methods for heat and fluid flow © 2011 Emerald. |
| spellingShingle | DRNTU::Science::Physics::Heat and thermodynamics Tiribocchi, Adriano Piscitelli, Antonio Gonnella, Giuseppe Lamura, Antonio Pattern study of thermal phase separation for binary fluid mixtures |
| title | Pattern study of thermal phase separation for binary fluid mixtures |
| title_full | Pattern study of thermal phase separation for binary fluid mixtures |
| title_fullStr | Pattern study of thermal phase separation for binary fluid mixtures |
| title_full_unstemmed | Pattern study of thermal phase separation for binary fluid mixtures |
| title_short | Pattern study of thermal phase separation for binary fluid mixtures |
| title_sort | pattern study of thermal phase separation for binary fluid mixtures |
| topic | DRNTU::Science::Physics::Heat and thermodynamics |
| url | https://hdl.handle.net/10356/99648 http://hdl.handle.net/10220/25678 |
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