Experimental and Numerical Simulation of Dry Pressure Drop in High-Capacity Structured Packings

2016 ◽  
Vol 39 (6) ◽  
pp. 1161-1170 ◽  
Author(s):  
Younes Amini ◽  
Javad Karimi-Sabet ◽  
Mohsen Nasr Esfahany
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
High Capacity ◽  
Structured Packings

Numerical Simulation of Heat Transfer Enhanced Tube Inserted Delta-Wing

2014 ◽  
Vol 535 ◽  
pp. 66-70
Author(s):  
Chen Hong Zhao ◽  
Yong Gang Lei
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Pressure Drop ◽  
Inclination Angle ◽  
Delta Wing ◽  
Delta Wings ◽  
Enhanced Tube ◽  
Delta Winglet

Heat transfer and resistance characteristics of a tube inserted delta-winglet (inclination angle is 10 °) are studied by numerical simulation. The results show that the delta-winglet enhance the heat transfer of the enhancement tube inserted delta-winglet and improve the PEC with modest pressure drop penalties. Compared with based tubes, the delta-wings structure enhance the heat transfer 19.52%-31%.

Design and Fabrication of Novel Electrode-Supported SOFC Having Honeycomb Structure

2008 ◽  
Author(s):  
Toshiaki Yamaguchi ◽  
Toshio Suzuki ◽  
Yoshinobu Fujishiro ◽  
Masanobu Awano ◽  
Sota Shimizu
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Cost Reduction ◽  
Unit Volume ◽  
Honeycomb Structure ◽  
Current Collection ◽  
Fuel Flow ◽  
Space Saving ◽  
Channel Surface ◽  
Calculation Results

We have developed a novel and highly effective electrode-supported SOFC with honeycomb structure for intermediate temperature operation. Honeycomb supported SOFC is known as one of the most compact SOFCs due to the large electrode area per unit volume, which is attractive with regard to space saving and cost reduction. In this study, we summarized the design of channel shape, size and sequence using numerical simulation and the technologies to realize the designed honeycomb SOFC fabrication. The calculation results showed that the wall thickness and the channel size of the honeycomb had to be less than 0.22 mm and more than 0.3 mm, respectively, for the sufficient net channel surface and the acceptable pressure drop. And a cathode-honeycomb supported SOFC can be the more efficient form with the lower current collection resistance, as compared with the anode-supported type. The actually fabricated honeycomb SOFC exhibited a high volumetric power density above 1 W/cm3 at 650 °C under wet H2 fuel flow.

Numerical Simulation of MHD Rectangular Duct Flow with FCI Based on Magnetic Induction Method

2012 ◽  
Vol 452-453 ◽  
pp. 344-347
Author(s):  
Tian Neng Xu ◽  
Jie Mao ◽  
Hua Chen Pan
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Liquid Metal ◽  
Magnetic Induction ◽  
Metal Flow ◽  
Duct Flow ◽  
Rectangular Duct ◽  
Induction Method ◽  
Pressure Equalization ◽  
Liquid Metal Flow

In dual-coolant and self-cooled blanket concepts, the magnetohydrodynamic (MHD) pressure drop is a key point that should be considered. In order to reduce the high MHD drop, it requires an understanding of the liquid metal flow in rectangular duct with FCI. In this paper, two cases that have different pressure equalization slot widths were simulated based on MHD module of FLUENT. It is found that with different widths of pressure equalization slot, velocity distribution and pressure drop changes a lot.

scholarly journals Numerical Simulation of Dispersed Particle-Blood Flow in the Stenosed Coronary Arteries

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Mongkol Kaewbumrung ◽  
Somsak Orankitjaroen ◽  
Pichit Boonkrong ◽  
Buraskorn Nuntadilok ◽  
Benchawan Wiwatanapataphee
Keyword(s):  
Numerical Simulation ◽  
Blood Flow ◽  
Shear Stress ◽  
Coronary Artery ◽  
Pressure Drop ◽  
Wall Shear Stress ◽  
Stokes Equations ◽  
Spherical Shape ◽  
Shear Stresses ◽  
Wall Shear

A mathematical model of dispersed bioparticle-blood flow through the stenosed coronary artery under the pulsatile boundary conditions is proposed. Blood is assumed to be an incompressible non-Newtonian fluid and its flow is considered as turbulence described by the Reynolds-averaged Navier-Stokes equations. Bioparticles are assumed to be spherical shape with the same density as blood, and their translation and rotational motions are governed by Newtonian equations. Impact of particle movement on the blood velocity, the pressure distribution, and the wall shear stress distribution in three different severity degrees of stenosis including 25%, 50%, and 75% are investigated through the numerical simulation using ANSYS 18.2. Increasing degree of stenosis severity results in higher values of the pressure drop and wall shear stresses. The higher level of bioparticle motion directly varies with the pressure drop and wall shear stress. The area of coronary artery with higher density of bioparticles also presents the higher wall shear stress.

Active Air Control System Development Using Charge Air Integrated Manifold Engine Numerical Simulation (CAIMENS)

2007 ◽  
Author(s):  
Diana K. Grauer ◽  
Kirby S. Chapman ◽  
Ali Keshavar
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Flow Rate ◽  
Pressure Wave ◽  
Equivalence Ratio ◽  
Peak Pressure ◽  
Intake Manifold ◽  
Airflow Rate ◽  
Engine System ◽  
The Impact

The natural gas transmission industry integrates turbochargers into the engine system to strategically increase airflow for the purpose of decreasing pollutant emissions, such as Nitrogen Oxide (NOX). Regulations are expected to be tightened in the coming years, forcing transmission companies to look past turbochargers for compliance. The solution to further decreasing emissions lies not in further retrofit, but focusing on the physics of the current system. The flow rate physics of the intake and exhaust manifolds impede equal distribution of air from the turbocharger to each cylinder. Imbalance in airflow creates a discontinuity in the trapped equivalence ratio from cylinder to cylinder. The trapped equivalence ratio is directly proportional to NOX production and a function of the fuel flow rate, airflow rate, and, in two-stroke cycle engines, the scavenging efficiency. Only when these three characteristics are balanced cylinder to cylinder will the combustion and the NOX production in each cylinder be equal. The engine NOX production will be disproportionately high if even one cylinder operates less lean relative to the other cylinders. Balancing the NOX production between cylinders can lower the overall NOX production of the engine. This paper reports on an investigation into the transient, compressible flow physics that impact the trapped equivalence ratio. A comprehensive, variable geometry, multi-cylinder Turbocharger-Reciprocating Engine Computer Simulation (T-RECS) has been developed to illustrate the effect of airflow imbalance on an engine. A new model, the Charge Air Integrated Manifold Engine Numerical Simulation (CAIMENS), is a manifold flow model coupled with the T-RECS engine processor that uses an integrated set of fundamental principles to determine the crank angle-resolved pressure, temperature, burned and unburned mass fractions, and gas exchange rates for the cylinder. CAIMENS has the ability to show the transient impact of one cylinder firing on each successive cylinder. The pulsation model also describes the impact of manifold pressure drop on in-cylinder peak pressure and the pressure wave introduced to the intake manifold by uncovering the intake ports. CAIMENS provides the information necessary to quantify the impact of airflow imbalance, and allows for the visualization of the engine system before and after airflow correction. The model shows that not only does the manifold pressure drop have a significant impact on the in-cylinder peak pressure, but it also has an impact on the pressure wave introduced to the intake manifold as the ports are opened. Also, each cylinder has a considerable impact on the airflow into each successive cylinder.

scholarly journals Numerical simulation of foam flow pressure drop in coiled tubing spiral section

2019 ◽  
Vol 1300 ◽  
pp. 012028
Author(s):  
Xiaoning Zhang ◽  
Dongzhu Sun ◽  
Anle He ◽  
Zhenguo He ◽  
Lulin Kong
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Foam Flow ◽  
Coiled Tubing ◽  
Flow Pressure

Influence of the Alignment of Two Airfoils in the Losses Generation

2009 ◽  
Vol 15 ◽  
pp. 27-32
Author(s):  
Luis A. Moreno-Pacheco ◽  
G.E. Valle-Meléndez ◽  
Claudia del Carmen Gutiérrez Torres ◽  
J.A. Jiménez-Bernal ◽  
M. Toledo-Velázquez
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Turbulence Model ◽  
Drag Forces ◽  
Naca 0012 ◽  
Aerodynamic Losses

A numerical simulation of a flow passing throw two NACA 0012 airfoils is presented in this paper. Aerodynamics, drag forces, and pressure drop is quantified when both profiles are axially aligned and then when one of them is vertically displaced. NUMECA code and Spalart-Allmaras turbulence model were used for this purpose. The results showed that aerodynamic losses are present in both profiles, meaning that the presence of the back profile plays an important role in the aerodynamic behavior of the frontal profile.

Separation efficiency and pressure drop of SiC ceramic and Mellapak structured packings

2016 ◽  
Vol 25 (1) ◽  
pp. 1-14 ◽  
Author(s):  
A. N. Pavlenko ◽  
J. Zeng ◽  
N. I. Pecherkin ◽  
V. E. Zhukov ◽  
O. A. Volodin
Keyword(s):  
Pressure Drop ◽  
Separation Efficiency ◽  
Sic Ceramic ◽  
Structured Packings
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