ISOTHERMAL DISSOLUTION OF A SPHERICAL PARTICLE WITH A MOVING BOUNDARY IN A FLOW FIELD
Numerical solution for isothermal dissolution process of a spherical particle with a moving boundary and thepresence of hydrodynamics effects of two different flow fields in a binary solution is described in this paper. Theflow fields considered are slow viscous flow or Stokes flow and straining mot...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| País: | México |
| Institución: | Universidad Autónoma del Estado de Hidalgo |
| Repositorio: | Redalyc-UAEH |
| OAI Identifier: | oai:redalyc.org:62060204 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=62060204 |
| Access Level: | acceso abierto |
| Palabra clave: | Ingeniería shear flow dissolution Stokes flow moving boundary spherical particle |
| Sumario: | Numerical solution for isothermal dissolution process of a spherical particle with a moving boundary and thepresence of hydrodynamics effects of two different flow fields in a binary solution is described in this paper. Theflow fields considered are slow viscous flow or Stokes flow and straining motion or shear flow around the particle.The parabolic differential equations were discretised with finite difference method in space, and the resulting set ofordinary differential equations on time was solved by the method of lines. The analysis includes the radialconvective term generated due to the density differences between the solid and liquid phases. The effect due to thenatural convection caused by density differences between both phases are evaluated and compared with the effectdue to the low Reynolds convective flow field. The numerical solution for the isothermal dissolution of a sphericalparticle in a binary melt is not only compared with integral method for small times of the process but also theresults are verified with mass balance integration. The integral method solutions are found to agree with thenumerical results for small time of dissolution. |
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