Pressure drop and flooding in packed columns operating at high pressures

1987 ◽  
Vol 10 (1) ◽  
pp. 231-242 ◽  
Author(s):  
Helmut Krehenwinkel ◽  
Helmut Knapp
Keyword(s):  
Pressure Drop ◽  
High Pressures ◽  
Packed Columns

Modelling of pressure drop in packed columns

1991 ◽  
Vol 14 (2) ◽  
pp. 89-95 ◽  
Author(s):  
Reinhard Billet ◽  
Michael Schultes
Keyword(s):  
Pressure Drop ◽  
Packed Columns

A Unified Model for Countercurrent Vapor/Liquid Packed Columns. 1. Pressure Drop

1994 ◽  
Vol 33 (5) ◽  
pp. 1208-1221 ◽  
Author(s):  
Brian Hanley ◽  
Brian Dunbobbin ◽  
Douglas Bennett
Keyword(s):  
Pressure Drop ◽  
Packed Columns ◽  
Unified Model ◽  
Vapor Liquid

Principles of Low Pressure-Drop Packed Columns.

1964 ◽  
Vol 36 (1) ◽  
pp. 58-63 ◽  
Author(s):  
J. C. Sternberg ◽  
R. E. Poulson
Keyword(s):  
Pressure Drop ◽  
Low Pressure ◽  
Packed Columns

scholarly journals Gas Cooling of a Porous Heat Source

1952 ◽  
Vol 19 (2) ◽  
pp. 173-178
Author(s):  
Leon Green
Keyword(s):  
Pressure Drop ◽  
Heat Generation ◽  
Power Output ◽  
High Pressures ◽  
Temperature Stability ◽  
Porous Wall ◽  
Dimensionless Temperature ◽  
Temperature Profiles ◽  
Pumping Power ◽  
Thermal Dependence

Abstract A limiting case of solid-fluid heat transfer is examined, in which a gas passes through a porous wall of high specific surface with heat generation within the solid material. Dimensionless temperature profiles in the wall are presented in terms of the rate of heat generation, rate of flow, and thermal properties of the gas and solid. The pressure drop across the wall is approximated by using an average wall temperature and assuming isothermal conditions. Temperature profiles, pressure drops, and pumping-power/power-output ratios are calculated for the hypothetical case of a heated graphite wall cooled by helium. It is found that the thermal dependence of the gas viscosity produces a minimum in the pressure-drop versus flow-rate curve, and it appears that favorable pumping-power/power-output ratios can be obtained by the use of high pressures. The problem of temperature stability in a gas-cooled porous solid is pointed out and the need for experimental work emphasized. Use of the sweat-cooling technique for high-pressure, high-temperature ducts is suggested.

The effect of temperature on the fluid flow dynamics in technical systems with jets

2016 ◽  
Vol 11 (1) ◽  
pp. 1-9 ◽  
Author(s):  
I.Sh. Nasibullayev ◽  
E.Sh. Nasibullaeva
Keyword(s):  
Pressure Drop ◽  
High Pressures ◽  
Microelectromechanical Systems ◽  
Stokes Equations ◽  
Significant Loss ◽  
Effect Of Temperature ◽  
Navier Stokes ◽  
Axially Symmetric ◽  
Navier Stokes Equations ◽  
Pressure Drops

In this paper the steady flow of technical fluid induced pressure drop in the channel with a cylindrical jet for the entire working temperature range have been studied. The Navier–Stokes equations are solved numerically in axially symmetric geometry by the finite element method. The temperature dependence of the material parameters of a number of liquids, most commonly used in technical devices have been obtained. A model of a cylindrical jet was built in the form of a computing element of the stand, which takes into account the pressure drop, the radius of passage opening jet and the liquid temperature for the areas with low and high pressure drops. This model allows without significant loss of accuracy replace the complete numerical simulation, requires more computational resources, by simple analytical formulas admitting modeling in computational stand in real time. The model can be used in various technical applications of microelectromechanical systems (at low pressure drops) to the fuel metering elements (at high pressures drops).

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