Comparative Study of Nonreflecting Boundary Condition for One-Step Duct Aeroacoustics Simulation

AIAA Journal ◽  
2006 ◽  
Vol 44 (3) ◽  
pp. 664-667 ◽  
Author(s):  
R. C. K. Leung ◽  
X. M. Li ◽  
R. M. C. So
Keyword(s):  
Boundary Condition ◽  
Comparative Study ◽  
One Step ◽  
Nonreflecting Boundary Condition

A comparative study evaluating the esophageal transit time of eight healthy cats when pilled with the FlavoRx pill glide versus pill delivery treats

2010 ◽  
Vol 12 (4) ◽  
pp. 286-290 ◽  
Author(s):  
Alexander D. Bennett ◽  
Catriona M. MacPhail ◽  
Debra S. Gibbons ◽  
Michael R. Lappin
Keyword(s):  
Comparative Study ◽  
Transit Time ◽  
Esophageal Stricture ◽  
Stricture Formation ◽  
Delivery Method ◽  
Esophageal Transit ◽  
One Step

Retention of tablets or capsules in the feline esophagus can be associated with esophagitis and esophageal stricture formation. The objective of this study was to evaluate the esophageal passage of tablets and capsules when administered with either a one-step pill gun with flavored liquid (FlavoRx pill glide) or a pill delivery treat (Pill Pockets). Four different medication administrations were evaluated on different days in eight normal cats: tablets with FlavoRx pill glide (T-FG), tablets with pill delivery treats (T-PP), capsules with FlavoRx pill glide (C-FG) and capsules with pill delivery treats (C-PP). The estimated average transit time was 36 s for T-FG, 60 s for T-PP, 16 s for C-FG, and 24 s for C-PP. The results of this study suggest that either pill delivery method is acceptable for successful passage of tablets or capsules into the stomach of cats using a single replicate.

Comparative study of conventional vs. one-step-interconnected (OSI) monolithic CdTe modules

2015 ◽  
Vol 19 (7) ◽  
pp. 488-493
Author(s):  
G. Kartopu ◽  
M. Crozier ◽  
A. Brunton ◽  
V. Barrioz ◽  
S. Hodgson ◽  
...  
Keyword(s):  
Comparative Study ◽  
One Step

Phase-Lagged Boundary Condition Methods for Aeroelastic Analysis of Turbomachines: A Comparative Study

1999 ◽  
Author(s):  
R. Srivastava ◽  
Milind A. Bakhle ◽  
Theo G. Keith ◽  
G. L. Stefko
Keyword(s):  
Boundary Condition ◽  
Comparative Study ◽  
Decomposition Method ◽  
Decomposition Methods ◽  
Navier Stokes ◽  
Fourier Decomposition ◽  
Computational Costs ◽  
Aeroelastic Analysis ◽  
Study Results ◽  
Time Marching

In the present work a comparative study of phase-lagged boundary condition methods is carried out. The relative merits and advantages of time-shifted and the Fourier decomposition methods are compared. Both methods are implemented in a time marching Euler/Navier-Stokes solver and are applied to a flat plate helical fan with harmonically oscillating blades to perform the study. Results were obtained for subsonic as well as supersonic inflows. Results for subsonic inflow showed good comparisons with published results and between the two methods along with comparable computational costs. For the supersonic inflow, despite the presence of shocks at the periodic boundary results from both the methods compared well, however, Fourier decomposition method was computationally more expensive. For linear flowfield Fourier decomposition method is best suited, especially for work-station environment. The time-shifted method is better suited for CRAY category of computers where fast input-output devices are available.

scholarly journals 4-Nitrophenyl activated esters are superior synthons for indirect radiofluorination of biomolecules

2020 ◽  
Vol 11 (8) ◽  
pp. 919-922
Author(s):  
Mohammad B. Haskali ◽  
Ashleigh L. Farnsworth ◽  
Peter D. Roselt ◽  
Craig A. Hutton
Keyword(s):  
Comparative Study ◽  
Small Molecules ◽  
Activated Esters ◽  
One Step ◽  
Prosthetic Groups

A comparative study of PNP- and TFP-activated esters of radiolabelled prosthetic groups demonstrates the superiority of PNP esters in terms of stability and yields for use in one-step radiolabelling of small molecules and peptides.

scholarly journals COMPUTATIONAL FLUID DYNAMICS STUDY OF PULL AND PLUG FLOW BOUNDARY CONDITION ON NASAL AIRFLOW

2013 ◽  
Vol 25 (04) ◽  
pp. 1350044 ◽  
Author(s):  
Mohammed Zubair ◽  
Vizy Nazira Riazuddin ◽  
Mohammad Zulkifly Abdullah ◽  
Ismail Rushdan ◽  
Ibrahim Lutfi Shuaib ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Boundary Condition ◽  
Computational Fluid Dynamics ◽  
Boundary Conditions ◽  
Comparative Study ◽  
Flow Model ◽  
Plug Flow ◽  
Maximum Velocity ◽  
Nasal Valve ◽  
Flow Boundary

The recent advances in the computer based computational fluid dynamics (CFD) software tools in the study of airflow behavior in the nasal cavity have opened an entirely new field of medical research. This numerical modeling method has provided both engineers and medical specialists with a clearer understanding of the physics associated with the flow in the complicated nasal domain. The outcome of any CFD investigation depends on the appropriateness of the boundary conditions applied. Most researchers have employed plug boundary condition as against the pull flow which closely resembles the physiological phenomenon associated with the breathing mechanism. A comparative study on the effect of using the plug and pull flow boundary conditions are evaluated and their effect on the nasal flow are studied. Discretization error estimation using Richardson's extrapolation (RE) method has also been carried out. The study is based on the numerical model obtained from computed tomographic data of a healthy Malaysian subject. A steady state Reynold averaged Navier–Stokes and continuity equations is solved for inspiratory flow having flow rate 20 L/min representing turbulent boundary conditions. Comparative study is made between the pull and plug flow model. Variation in flow patterns and flow features such as resistance, pressure and velocity are presented. At the nasal valve, the resistance for plug flow is 0.664 Pa-min/L and for pull flow the value is 0.304 Pa-min/L. The maximum velocity at the nasal valve is 3.28 m/s for plug flow and 3.57 m/s for pull flow model.

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