scholarly journals Are There Any Experimental Perfusion Data that Preferentially Support the Dispersion and Parallel-Tube Models over the Well-Stirred Model of Organ Elimination?

2020 ◽  
Vol 48 (7) ◽  
pp. 537-543
Author(s):  
Jasleen K. Sodhi ◽  
Hong-Jaan Wang ◽  
Leslie Z. Benet
Keyword(s):  
Parallel Tube

Experimental and numerical investigation on seismic performance of hollow floor interior slab-column connections

2020 ◽  
pp. 136943322096527
Author(s):  
Longji Dang ◽  
Rui Pang ◽  
Rui Liu ◽  
Hongmei Ni ◽  
Shuting Liang
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Seismic Performance ◽  
Seismic Behavior ◽  
Element Model ◽  
Experimental Results ◽  
Element Analysis ◽  
Skeleton Curve ◽  
The North ◽  
Parallel Tube

This paper aims to investigate the seismic performance of hollow floor interior slab-column connection (HFISC). In this new connection system, several tube fillers are placed in slab to form hollow concrete. Moreover, locally solid zone, shear components, and hidden beam around the connections are installed to improve the bearing capacity and ductility of specimens. Three slab-column connections with different shear components were tested under cyclic loading and every specimen was constructed with parallel tube fillers in the north direction and orthogonal tube fillers in the south direction. The seismic behavior of specimens was evaluated according to the hysteretic response, skeleton curve, ductility, stiffness degradation, and energy dissipation. A finite element model was then developed and validated by a comparison with the experimental results. Based on experimental results and finite element analysis results, the relative effects of the hollow ratio of slab, the ratio of longitudinal reinforcement, the shear area of bent-up steel bars, and the arm length of welding section steel cross bridging were elucidated through parametric studies. This new slab-column connection showed better plastic deformation capacity while the bearing capacity was kept. Specimens with parallel tube fillers showed better seismic behavior than those of specimens with orthogonal tube fillers.

FLOW BEHAVIOR IN A PARALLEL-TUBE HEAT TRANSPORT DEVICE ANALYZED BY USING IMAGE PROCESSING

2010 ◽  
Vol 17 (4) ◽  
pp. 333-346
Author(s):  
Thanh-Long Phan ◽  
Akira Murata ◽  
Sadanari Mochizuki ◽  
Kaoru Iwamoto ◽  
Hiroshi Saito
Keyword(s):  
Image Processing ◽  
Heat Transport ◽  
Flow Behavior ◽  
Parallel Tube ◽  
Transport Device

Crude Oil Fouling in a Pilot-Scale Parallel Tube Apparatus

2009 ◽  
Vol 30 (10-11) ◽  
pp. 777-785 ◽  
Author(s):  
B. D. Crittenden ◽  
S. T. Kolaczkowski ◽  
T. Takemoto ◽  
D. Z. Phillips
Keyword(s):  
Crude Oil ◽  
Pilot Scale ◽  
Parallel Tube ◽  
Oil Fouling

scholarly journals Analisa Kinerja Aliran Fluida dalam Rangkaian Seri dan Paralel dengan Penambahan Tube Bundle pada Pompa Sentrifugal

2019 ◽  
Vol 3 (2) ◽  
pp. 71
Author(s):  
Muhammad Marzuky Saleh ◽  
Edi Widodo
Keyword(s):  
Flow Velocity ◽  
Tube Bundle ◽  
High Surface ◽  
Fluid Pressure ◽  
Discharge Flow ◽  
Flow Type ◽  
Pressure Discharge ◽  
Parallel Circuit ◽  
Parallel Tube ◽  
Pump House

Pump is a device used to move fluid from one place to another through the pipe media as a channel. The pump has 2 important components in its performance, namely: Impeller and pump house (casing). When the pump cannot meet the required capacity it can use series and parallel pump circuits to increase it. When moving the fluid to a high surface or high pressure it will have the specifications of the head and discharge. Fluid flow is a liquid that flows in a pipe. In flow there is fluid pressure and also flow type. There are 3 flow types, namely laminer, transition, turbulent. To reduce turbulence in the flow can be used Tube bundle which is a device consisting of several pipes that are tied together that are attached to a cross section in the pipe. This research was conducted in 4 testing stages, namely series circuit with additional tube bundle, series circuit without additional tube bundle, parallel circuit with additional tube bundle, parallel circuit without additional tube bundle. Each test takes fluid pressure, discharge, flow type. From the results of this study it was found that the parallel circuit pump with an additional tube bundle produces fluid pressure, discharge, flow velocity smaller than the series circuit, whereas when without additional the parallel tube pump bundle produces a fluid pressure, discharge, flow velocity greater than the circuit series, while for the flow type of this study is turbulent flow.

Derecruitment in cat liver: extension of undistributed parallel tube model to effects of low hepatic blood flow on ethanol uptake

1989 ◽  
Vol 67 (10) ◽  
pp. 1225-1231 ◽  
Author(s):  
C. V. Greenway ◽  
L. Bass
Keyword(s):  
Blood Flow ◽  
Hepatic Blood Flow ◽  
Venous Pressure ◽  
Liver Blood Flow ◽  
Hepatic Uptake ◽  
Tube Model ◽  
Low Flows ◽  
Wide Range ◽  
Parallel Tube ◽  
Parallel Tube Model

Previous studies showed two deviations from the predictions of the undistributed parallel tube model for hepatic uptake of substrates: a small deviation at high flows and a large deviation at low flows. We have examined whether these deviations could be described by a single correction factor. In cats anesthetized with pentobarbital, a hepatic venous long-circuit technique with an extracorporeal reservoir was used to vary portal flow and hepatic venous pressure, and allow repeated sampling of arterial, portal, and hepatic venous blood without depletion of the cat's blood volume. Hepatic uptake of ethanol was measured over a wide range of blood flows and when intrahepatic pressure was increased at low flows. This uptake could be described by the parallel tube model with a correction for hepatic blood flow: [Formula: see text]. In 22 cats, [Formula: see text], k = 0.021 ± 0.0015 when flow (F) was in millilitres per minute per 100 g liver, and Km = 150 ± 20 μM when ĉ is the log mean sinusoidal concentration. (1 − e−kF) represents the proportion of sinusoids perfused and metabolically active. A dynamic interpretation of this proportion is related to intermittency (derecruitment) of sinusoidal flow. Half the sinusoids were perfused at a flow of 33 mL/(min∙100 g liver) and the liver was essentially completely perfused (> 95%) at the normal flow of 150 mL/(min∙100 g liver). Derecruitment was not changed by raising hepatic venous pressure, and it was not related to hepatic venous resistance.Key words: liver circulation, ethanol metabolism, liver blood flow, sinusoidal perfusion, portal pressure.

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