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A combined viscous-vortex, thermal-blob and Lagrangian method for non-isothermal, two-phase flow modellingстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 июня 2016 г.
- Авторы: Rybdylova O., Osiptsov A.N., Sazhin S.S., Begg S., Heikal M.
- Журнал: International Journal of Heat and Fluid Flow
- Том: 58
- Год издания: 2016
- Издательство: Institution of Mechanical Engineering Publications
- Местоположение издательства: United Kingdom
- Первая страница: 93
- Последняя страница: 102
- DOI: 10.1016/j.ijheatfluidflow.2015.12.003
- Аннотация: A meshless method for modelling of 2D transient, non-isothermal, gas-droplet flows with phase transitions, based on a combination of the viscous-vortex and thermal-blob methods for the carrier phase with the Lagrangian approach for the dispersed phase,is developed. The one-way coupled, two-fluid approach is used in the analysis. The method makes it possible to avoid the ‘remeshing’ procedure (recalculation of flow parameters from Eulerian to Lagrangian grids)and reduces the problem to the solution of three systems of ordinary differential equations, describing the motion of viscous-vortex blobs, thermal blobs, and evaporating droplets. The gas velocity field is restored using the Biot–Savart integral. The numerical algorithm is verifiedagainsttheanalyticalsolutionforanon-isothermal Lamb vortex and some asymptotic results known in the literature. The method is applied to modelling of an impulse two-phase cold jet injected into a quiescent hot gas, taking into account droplet evaporation. Various flow patterns are obtained in the calculations, depending on the initial dropletsize: (i)low-inertia droplets, evaporating at a higher rate, formring-like structures and are accumulated on lybehind the vortex pair;(ii)large droplets move closer to the jet axis, with their sizes remaining almost unchanged; and(iii)intermediate-size droplets are accumulated in a curved band whose ends trail in the periphery behind the head of the cloud, with larger droplets being collected at the front of the two-phase region.
- Добавил в систему: Осипцов Александр Николаевич