Now showing items 1-10 of 1170
On the measurement of the mass flow rate of horizontal two-phase flows in the proximity of the transition lines which separates two different flow patterns
(Elsevier Sci LtdOxfordInglaterra, 2008)
Simulations of incompressible fluid flows by a least squares finite element method
In this work simulations of incompressible fluid flows have been done by a Least Squares Finite Element Method (LSFEM) using velocity-pressure-vorticity and velocity-pressure-stress formulations, named u-p-ω) and u-p-τ ...
Análise do escoamento de HFC-134a em tubos capilares usando o modelo de dois fluidos
This work presents a numerical model to simulate refrigerant flow through capillary tubes, commonly used as expansion devices in refrigeration systems. The capillary tube is considered straight and horizontal. The flow is ...
Mass-transfer characterization in a parallel-plate electrochemical reactor with convergent flow
A continuous reduction in the cross-section area is analysed as a means of improving mass-transfer in a parallel-plate electrochemical reactor. Experimental local mass-transfer coefficients along the electrode length are ...
Characterization of proanthocyanidins from Parkia biglobosa (Jacq.) G. Don. (Fabaceae) by flow injection analysis - Electrospray ionization ion trap tandem mass spectrometry and liquid chromatography/electrospray ionization mass spectrometry
The present study investigates the chemical composition of the African plant Parkia biglobosa (Fabaceae) roots and barks by Liquid Chromatography - Electrospray Ionization and Direct Injection Tandem Mass Spectrometry ...
Transient flow of the oil-refrigerant mixture through the radial clearance in rolling piston compressors
Unsteady flow of oil and refrigerant gas through radial clearance in rolling piston compressors has been modeled as a heterogeneous mixture, where the properties are determined from the species conservation transport ...
Experimental analysis of heat transfer in packed beds with air flow
Heat-transfer studies were carried out in a packed bed of glass beads, cooled by the wall, through which air percolated. Tube-to-particle diameter ratios (D/dp) ranged from 1.8 to 55, while the air mass flux ranged from ...
Critical parameter determination of sonic flow controller diamond microtubes and micronozzles
In this article, the authors measure throughput of sonic diamond microtubes and micronozzles that can work as passive gas flow controllers and flow meters under choking conditions. The behavior of the outlet pressure through ...
New prediction methods for CO2 evaporation inside tubes: Part I - A two-phase flow pattern map and a flow pattern based phenomenological model for two-phase flow frictional pressure drops
(PERGAMON-ELSEVIER SCIENCE LTD, 2008)
An updated flow pattern map was developed for CO2 on the basis of the previous Cheng-Ribatski-Wojtan-Thome CO2 flow pattern map [1,2] to extend the flow pattern map to a wider range of conditions. A new annular flow to ...
STUDY OF MASS-TRANSFER EFFICIENCY IN PERVAPORATION PROCESSES
(Elsevier Science BvAmsterdamHolanda, 1994)