Investigation of Pressure Drop for Fluid Flow Through Porous Media: Application to a Pebble-Bed Reactor

2010 ◽  
Author(s):  
Xiaoyu Cai ◽  
Guanghui Su ◽  
Suizheng Qiu ◽  
Wenxi Tian
Keyword(s):  
Porous Media ◽  
Pressure Drop ◽  
Flow Characteristics ◽  
Internal Heat ◽  
Internal Heat Source ◽  
Flow Through Porous Media ◽  
Pebble Bed ◽  
Two Phase ◽  
Pebble Bed Reactor ◽  
Flow Through

The present studied Pebble-Bed Reactor is a light-water cooled reactor that consists of millions of Micro-Fuel Elements, and the TRISO-coated fuel particles (MFE) fill the fuel assembly disorderly and form a porous media with internal heat source. Papers on porous media continue to be published at the rate of about 150 per year and the domain of application is wide spread, ranging from chemical particle beds, mass separator units, debris beds, soil investigations, heat pipes and fluidized beds etc. In this paper, investigation is performed on the press drop under conditions of both single-phase and two-phase flow through porous media. Large number of relations are studied and the relational expressions, which generalize the available data of experiments, are suggested for pressure drop calculation in a pebble bed of spheres at random distribution. Finally, the relational expressions are applied to analyze the flow characteristics of the Pebble-Bed Reactor, such as the influence of pressure on two phase friction factor in the core etc.

Flow Characteristics at Low Quality for Horizontal Gas-Liquid Two-Phase Flow Through Porous Media

2007 ◽  
Author(s):  
Yasuyuki Takatsu ◽  
Takashi Masuoka ◽  
Takeru Takehara
Keyword(s):  
Porous Media ◽  
Flow Field ◽  
Two Phase Flow ◽  
Flow Characteristics ◽  
Solid Matrix ◽  
Phase Flow ◽  
Flow Through Porous Media ◽  
Two Phase ◽  
Flow Through ◽  
Microscopic Flow

As the geometric complexity of porous media brings about technical diffculties of the measurement and the visualization of the microscopic flow field, only few attempts have ever been made at the experimental examination of the two-phase flow through porous media. Therefore, we adopt a bank of tubes in a narrow gap as a porous model, and perform the visualization to examine the microscopic flow field for the horizontal two-phase flow through porous media in detail. The solid matrix in porous media plays an important role in the formation of the two-phase flow pattern. The solid matrix forces larger bubble than its representative length to be split, and the liquid bridge due to the capillary effect prevents the gas-phase merging together. Furthermore, the bubbles are trapped in the wide space surrounded with the solid matrices, where the compound bubble further absorbs smaller bubbles.

scholarly journals Pressure drop and average void fraction measurements for two-phase flow through highly permeable porous media

2016 ◽  
Vol 94 ◽  
pp. 422-432 ◽  
Author(s):  
N. Chikhi ◽  
R. Clavier ◽  
J.-P. Laurent ◽  
F. Fichot ◽  
M. Quintard
Keyword(s):  
Porous Media ◽  
Pressure Drop ◽  
Void Fraction ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Through
Sign in / Sign up

Export Citation Format

Share Document