Influence of gravity on heavy particle statistics in turbulent channel and pipe flow at matched Kàrmàn number

Torres, Maria J. and García García, Javier (2014). Influence of gravity on heavy particle statistics in turbulent channel and pipe flow at matched Kàrmàn number. "Revista Tecnica de la Facultad de Ingenieria Universidad del Zulia", v. 37 (n. 2); pp. 1-7. ISSN 0254-0770.

Description

Title: Influence of gravity on heavy particle statistics in turbulent channel and pipe flow at matched Kàrmàn number
Author/s:
  • Torres, Maria J.
  • García García, Javier
Item Type: Article
Título de Revista/Publicación: Revista Tecnica de la Facultad de Ingenieria Universidad del Zulia
Date: August 2014
ISSN: 0254-0770
Volume: 37
Subjects:
Freetext Keywords: large eddy simulation, solid particles, turbulent channel and pipe flow
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética y Fluidomecánica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this work, we use large eddy simulations (LES) and Lagrangian tracking to study the influence of gravity on particle statistics in a fully developed turbulent upward/downward flow in a vertical channel and pipe at matched Kàrmàn number. Only drag and gravity are considered in the equation of motion for solid particles, which are assumed to have no influence on the flow field. Particle interactions with the wall are fully elastic. Our findings obtained from the particle statistics confirm that: (i) the gravity seems to modify both the quantitative and qualitative behavior of the particle distribution and statistics of the particle velocity in wall normal direction; (ii) however, only the quantitative behavior of velocity particle in streamwise direction and the root mean square of velocity components is modified; (iii) the statistics of fluid and particles coincide very well near the wall in channel and pipe flow with equal Kàrmàn number; (iv) pipe curvature seems to have quantitative and qualitative influence on the particle velocity and on the particle concentration in wall normal direction.

More information

Item ID: 35990
DC Identifier: http://oa.upm.es/35990/
OAI Identifier: oai:oa.upm.es:35990
Official URL: http://produccioncientificaluz.org/index.php/tecnica/index
Deposited by: Memoria Investigacion
Deposited on: 24 Feb 2016 15:53
Last Modified: 24 Feb 2016 15:53
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