Topic
Countercurrent exchange
About: Countercurrent exchange is a research topic. Over the lifetime, 2255 publications have been published within this topic receiving 28687 citations. The topic is also known as: Countercurrent exchange.
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TL;DR: In this paper, a method for the determination of K0 and B0 values of highly permeable fiber membranes with single gas permeation experiments through a short dead end fibre is presented.
24 citations
TL;DR: The three-level-of-porosity (TLP) Reactor as mentioned in this paper is a three-phase, countercurrent hydrotreater that can be operated countercurrently with gas and liquid flowrates well above those currently used in commercial cocurrent hydrotreatingers and is therefore a promising alternative to the randomly packed fixed-bed trickle flow reactor for hydroprocessing of heavy oils.
24 citations
Journal Article•
24 citations
TL;DR: In this paper, the authors investigated the effects of gas flow rate, liquid flow velocity, and liquid flow direction (cocurrent, countercurrent or cross-current flow) on bubble formation for a period of 1.2 s.
24 citations
TL;DR: In this paper, numerical simulations were done to evaluate countercurrent flow limitation (CCFL) characteristics in a PWR hot leg with the diameter of 750mm by using a volume of fluid (VOF) method implemented in the CFD software, FLUENT6.
Abstract: Numerical simulations were done to evaluate countercurrent flow limitation (CCFL) characteristics in a pressurized water reactor (PWR) hot leg with the diameter of 750 mm by using a volume of fluid (VOF) method implemented in the CFD software, FLUENT6.3.26. The calculated CCFL characteristics agreed well with known values including the UPTF data at 1.5 MPa. Sensitivity analyses for system pressures up to 8 MPa showed that the calculated CCFL characteristics in the Wallis diagram were slightly mitigated from 0.1 MPa to 1.5 MPa with increasing system pressure, but they did not change from 1.5 MPa to 8MPa. Using the CCFLs calculated in this study and values measured under air–water and steam–water conditions, a CCFL correlation and its uncertainty were derived.
24 citations