Predicting flows from the Dynamic Ergun Equation

2017 ◽  
Vol 103-104 ◽  
pp. 11-13 ◽  
Author(s):  
G.B. Tupper ◽  
I. Govender ◽  
A.N. Mainza
Keyword(s):  
Ergun Equation

A new look at filter backwash hydraulics

2001 ◽  
Vol 1 (2) ◽  
pp. 65-72 ◽  
Author(s):  
Ömer Akgiray ◽  
Ahmet M. Saatçı
Keyword(s):  
Experimental Measurements ◽  
New Approach ◽  
Ergun Equation ◽  
Mathematical Formulas ◽  
Good Agreement ◽  
New Look

A new approach to model media expansion during filter backwash is presented. The proposed approach is based on the assumption that the Ergun equation remains valid after fluidization. Mathematical formulas are derived for predicting expanded porosity for a given backwash velocity or backwash velocity for a given expanded porosity. These formulas can be easily used by the engineer. Values predicted using the proposed approach are in good agreement with experimental measurements.

Testing of a new dynamic Ergun equation for transport with positron emission particle tracking

AIChE Journal ◽  
2015 ◽  
Vol 62 (3) ◽  
pp. 939-946 ◽  
Author(s):  
Gary B. Tupper ◽  
Indresan Govender ◽  
David N. De Klerk ◽  
Max C. Richter ◽  
Aubrey N. Mainza
Keyword(s):  
Particle Tracking ◽  
Ergun Equation ◽  
Positron Emission

scholarly journals Modified Ergun Equation for Airflow through Packed Bed of Loblolly Pine Grinds

2019 ◽  
Vol 36 (0) ◽  
pp. 232-240 ◽  
Author(s):  
Gbenga Olatunde ◽  
Oladiran Fasina
Keyword(s):  
Loblolly Pine ◽  
Packed Bed ◽  
Ergun Equation

Non-Newtonian Flow Behavior on Frictional Pressure in Packed Bed

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Suresh Kumar Patel ◽  
Subrata Kumar Majumder
Keyword(s):  
Pressure Loss ◽  
Liquid Velocity ◽  
Flow Behavior ◽  
Scale Up ◽  
Packed Bed ◽  
Newtonian Liquid ◽  
Newtonian Flow ◽  
Flow Behavior Index ◽  
Ergun Equation ◽  
Behavior Index

The packed bed columns with non-Newtonian liquid are increasing importance as a simple and inexpensive means of achieving yield of different chemical and biochemical processes though their hydrodynamic behavior is complex and not yet fully understood. In this article non-Newtonian flow behavior on frictional pressure was investigated in packed bed within a range of liquid velocity 0.004-0.04 m/s. The frictional pressure loss in non-Newtonian liquid system has been analyzed by modified Ergun equation. The modification of the Ergun equation is incorporated with the flow behavior index of non-Newtonian liquid. The degree of frictional pressure loss decreases with increase in flow behavior index. A correlation has been developed to interpret the degree of effect on the frictional pressure loss. The correlation may be useful for further understanding and scale-up of the packed bed column for its industrial application.

Study on Ergun Equation at Vacuum Pressures for Sodium Fluoride Adsorbents

2008 ◽  
Vol 41 (12) ◽  
pp. 1096-1101
Author(s):  
Kianoosh Karimpour ◽  
Jaber Safdari ◽  
Mohammad Ali Mousavian ◽  
Omid Zadakbar
Keyword(s):  
Sodium Fluoride ◽  
Ergun Equation

Airflow resistance in soybean

2012 ◽  
Vol 26 (2) ◽  
pp. 137-143 ◽  
Author(s):  
R. Kenghe ◽  
P. Nimkar ◽  
S. Shirkole ◽  
K. Shinde
Keyword(s):  
Pressure Drop ◽  
Moisture Content ◽  
Statistical Model ◽  
Bulk Density ◽  
Airflow Rate ◽  
Airflow Resistance ◽  
Ergun Equation ◽  
Aeration System

Airflow resistance in soybeanResistance of material to airflow is an important factor to consider in the design of a dryer or an aeration system. The airflow resistance of soybean was determined with the modified airflow resistance apparatus. It was found that pressure drop increased with increase in airflow rate, bulk density, bed depth and decreased with moisture content. Modified Shedd equation, Hukill and Ives equation and modified Ergun equation were examined for pressure drop prediction. Airflow resistance was accurately described by modified Shedd equation followed by Hukill and Ives equation and modified Ergun equation. The developed statistical model comprised of airflow rate, moisture content and bulk density could fit pressure drop data reasonably well.

Pore-scale derivation of the Ergun equation to enhance its adaptability and generalization

2008 ◽  
Vol 63 (9) ◽  
pp. 2576-2586 ◽  
Author(s):  
J. Prieur du Plessis ◽  
Sonia Woudberg
Keyword(s):  
Pore Scale ◽  
Ergun Equation

scholarly journals Fluid Flow in Tree-Shaped Constructal Networks: Porosity, Permeability and Inertial Parameter

2010 ◽  
Vol 297-301 ◽  
pp. 408-412 ◽  
Author(s):  
Antonio F. Miguel
Keyword(s):  
Fluid Flow ◽  
Flow Structure ◽  
Flow Structures ◽  
Hydraulic Permeability ◽  
Flow Networks ◽  
Circular Area ◽  
Ongoing Research ◽  
Inertial Parameter ◽  
Ergun Equation ◽  
Physical Description

This paper aims to contribute to the ongoing research on tree-shaped flow structures. First, it briefly traces the progress made on constructal tree-shaped flow networks. Then, the paper focuses on tree pattern of tubes connecting the centre and the rim of a circular area. It shows that the physical description underlying the classical Darcy-Forchheimer-Ergun equation may provide a legitimate correlation for this kind of flow structure. The porosity, hydraulic permeability and the inertial factor of the flow structure are also presented.

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