flow of compressible fluids in conduits

... Flow of Complex Biofluids in Microfluidic Devices Zhu Liang NATIONAL UNIVERSITY OF SINGAPORE 2006 Flow of Complex Biofluids in Microfluidic Devices Zhu Liang (B.Eng, ... micropumps.[36] Many focused turbulence researchers on or generating secondary flows in microfluidics by means of introducing timedependent forces into the system. This sort of mixers Figure 3 Schematic drawings of selected passive and active micromixing ... diffusion often dominates mixing mechanism in these devices The difficulty lies in inefficient mixing by pure diffusion in laminar bulk flow When channel cross section is of tens of microns

Ngày tải lên: 06/10/2015, 21:06

... investigated the impact of economic policy uncertainty (EPU) on cash holdings, revealing that heightened EPU can negatively influence business investment Their findings indicate that maintaining higher cash ... company's cash holdings Companies with robust cash flow are inclined to invest in working capital, particularly in inventory, to counter supply chain disruptions during economic uncertainty Furthermore, ... banks, making commercial credit a vital substitute for dwindling bank lending Effective management of collection policies during these times is essential for maintaining profitability and business

Ngày tải lên: 14/03/2025, 15:14

... of Cl in the fluid at low W/R (Fig 3), Fig 2 Secondary mineral precipitates as a function of increased water–rock interaction (i.e., decreasing W/R) in the 1-D flowmodels Notice that the ordinate ... sulfides precipitated in 1-D flow Model B (high CO2), as a function of changing pH and fO2 of the permeating fluid (solid line) with increased rock reacted (decreasing W/R) Dashed lines divide the ... systematics in ALH 84001 point to pre-existing phyllosilicates as the origin of 87Rb/86Sr enrichment in the carbonates, suggesting that fluids leached phyllosilicates prior to forming the carbonates

Ngày tải lên: 08/11/2022, 14:57

... one of the more affecting factors to increase the efficiency of the faỗade is the external air temperature The presence of ventilated faỗade in a building leads to a cooling effect in the skin of ... Miguel Mora Pérez M.Sc.in Industrial Engineering, Master in Energy Technology for Sustainable Development and Research Engineer in the Department of Hydraulic Engineering (Universidad Politécnica ... València in the E3 project in subjects related to sustainability in buildings This project is cofounded by the National Government of Spain Gonzalo López Patiđo is Industrial Engineer, Assistant Professor

Ngày tải lên: 05/09/2013, 14:58

... THEORY OF FLOW IN PIPE Principles of Compressible Flow in Pipe — continued Limiting flow of gases and vapours: The feature not evident in the preceding formulas (Equations 1-4 and 1-6 to 1-9 inclusive) ... minute volume, in cubic metres mean velocity of flow, in metres per second sonic (or critical) velocity of flow of a gas, in metres per second = rate of flow, in kilograms per hour = rate of ... conditions is often made by expressing the absolute pressure in terms of the height of a column of mercury or of water Millimetre of mercury, micrometre (micron) of mercury, inch of water and inch of mercury,

Ngày tải lên: 12/03/2014, 16:35

... identity of the specific MMPs involved in dif- ferent types of arthritis remains to be determined, from a clini- cal point of view this approach represents an interesting tool to test the potential of ... When testing the activity using SF of patients with RA, we found that while the percentage of inhibition of the NPA in the presence of inhibitor III rarely exceeded 10–15%, the level of inhibition ... results in the NPA found in SF – most probably by secreting proteases, or by inducing the secretion of proteases via the secretion of cytokines [33]. Our results showing elevated levels of TIMP-1 in

Ngày tải lên: 09/08/2014, 08:22

... effects of fluids and inotropes during optimization of the oxygen delivery index (DO 2 I) in high-risk patients submitted to major surgeries are due to fluids, to inotropes, or to the combination of ... patients randomized to the dobutamine group received the first fluid cycle during 60–90 minutes followed by increas- ing doses of dobutamine, beginning with 3 µg/kg/minute, until the goal was reached. ... reduction in hospital stay mainly due to the reduction of post- operative infection with postoperative goal-directed therapy using dopexamine to attain a DO 2 I > 600 ml/minute/m 2 – a finding

Ngày tải lên: 12/08/2014, 23:23

... Assoc Prof Low H.T and Assoc Prof Lee T.S for introducing me into the exciting field of biofluids and giving me good suggestions that contributed much towards the formation and completion of this ... transiently increasing fluid-phase endocytosis; and they are capable of producing intracellular actin and myosin filaments that are oriented in the flow direction Eskin et al (1984) investigated ... Introduction Martin and Vermette, 2005) Oxygen is one of the most important nutrients for cells However, it is often the limiting nutrient because of the difficulty in bringing sufficient amounts of oxygen

Ngày tải lên: 12/09/2015, 21:13

... 30Indirubin has been approved for clinical trials against chronic myelogenous leukemia (CML) in China since 1979 (Institute of Hematology, Chinese Academy of Medical Sciences, 1979) However, indirubin ... indirubin showed poor solubility in water and patients treated with indirubin had severe side effects affecting the gastrointestinal tract (Cooperative Group of Clinical Therapy of Indirubin, 1980; ... activity of indigo naturalis was attributed to a minor constituent (0.11%), namely indirubin (Chinese name Dian Yuhong), a red 3,2’-bisindole (Institute of Hematology, Chinese Academy of Medical

Ngày tải lên: 14/09/2015, 14:08

... Ra Schematic of a flow in a pipe Velocity profiles of the pipe flow Schematic of flow in a chamber with an end-wall rotating Streamline contours in the meridional plane in the cylindrical chamber ... NUMERICAL STUDY OF SWIRLING FLOW AND OXYGEN TRANSPORT IN A MICRO-BIOREACTOR YU PENG NATIONAL UNIVERSITY OF SINGAPORE 2006 Trang 2A NUMERICAL STUDY OF SWIRLING FLOW AND OXYGEN TRANSPORT IN A MICRO-BIOREACTOR ... bottom-wall rotating; H/R = 2.0 and Re as indicated Schematic of a flow in a porous square channel Comparisons of the velocity profile in the porous channel Schematic of a natural convection in a porous

Ngày tải lên: 14/09/2015, 18:55

... neuro-probe penetrating into brain tissue and the dynamics of a single DNA chain – they are studied and presented in chapter 6 Some promising results are obtained In chapter 7, the results of the thesis ... by the Mechanical Engineering Department in the Engineering Faculty of the National University of Singapore, as well as the grant for the International Rheology Congress 15 in Korea This work would ... understanding of the behaviour of suspensions 2.2.1 Single particle systems As mentioned at the beginning of this chapter, Jeffery’s equation [Jeffery (1922)] is a starting point of many subsequent

Ngày tải lên: 15/09/2015, 17:09

... another in the way they introduce upwinding The work of Deshpande et al.83 deals with an upwind implementation based on the Kinetics Theory of Gases, resulting in a least-squares kinetic upwind method ... grid nodes only in the immediate vicinity of the interface by adding forcing functions constructed to enforce a set of appropriate jump conditions at the interface It maintains sharp-interfaces between ... distribute the forcing over 3−4 grid nodes in the vicinity of the boundary The spreading of the forcing function results in smearing of the interface and increases the spatial resolution requirements

Ngày tải lên: 03/10/2015, 21:56

... SIMULATION OF COMPRESSIBLE FLUIDSTRUCTURE INTERACTION IN ONE AND TWO DIMENSION ABDUL WAHAB CHOWDHURY (B.Sc in Mechanical Engineering, BUET) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING ... SUMMARY In this work, we are particularly interested in simulating the interaction between fluid and solid when the fluid flow is in compressible regime involving shock or rarefaction waves and flow ... Element of tensor in the direction of x axis and in a plane perpendicular to x axis yy Element of tensor in the direction of y axis and in a plane perpendicular to y axis xy Element of tensor in the

Ngày tải lên: 27/11/2015, 11:12

... chosen for being abundant and representative of agricultural (grapevine pruning), forestry (pine sawdust) and industrial (dealcoholised marc of grape) wastes in the inland regions of Spain The description ... negligible since the reactor temperature is very high, the tar sampling line has not been used in the present work A sampling line including a small particle filter and a pump allows to measure in-line ... having a significant influence in the kinetics of the process and thus on the gasification efficiency Thus, this paper, as a continuation of a previous work focused on the study of the effect of

Ngày tải lên: 01/08/2016, 09:30

... Journal of Materials Processing Technology 59 (1996) 95-105 of Materials Processing Technology Investigation of metal flow and preform optimization in flashless forging of a connecting rod ... Punch force of preform upsetting process Punch m o v e m e n t Fig 12: Material flow in forging of the connecting rod Fig 11: Simulation model for the forging of the connecting rod Table1: Input data ... connecting rod was performed using preform-I as defined in previous studies [2,3] A sketch of preform-I is shown in Fig 8 3.1 F E Simulation o f the Forging Process An upsetting step of the initial

Ngày tải lên: 24/11/2016, 18:08

... saturation of the non-wetting phase obtained by the advancing of the wetting phase (imbibition process) in displacing the non-wetting phase is a key parameter in the hysteresis effect, specifying the ... out The next stage in creating new project is to define inlet and outlet conditions of the core while performing flooding test (Figure A-5) In this window the values of constant injection rate and ... determining kr curves by using this program are; inputting data, running simulation and viewing results as demonstrated below: 178 Appendix A: Application of 3RPSim Figure A-1: Main page A.1 Input

Ngày tải lên: 19/03/2017, 08:32

... represent flow into a grid cell of a differing land cover We define the relative degree of buffering (RDB) index as the fraction of HOF-producing cells that flow into potential buffering cells: ... occurrence of HOF on indi-vidual hillslopes Reduction of the total watershed total depth of HOF would require main-taining a sufficient area of buffering land covers; and this may necessitate the use of ... degree of fragmentation (BWHOFcurrent), is com-pared inTable 6with that of the following three fragmenta-tion scenarios: (1) minimum buffering (BWHOFmin-buffering); (2) maximum buffering (BWHOFmax-buffering);

Ngày tải lên: 16/12/2017, 01:06

... 2.3 Equation of the entropy Let us now find the equation of conservation of energy in terms of the specific entropy S The left-hand side of the equation of conservation of energy of(1.1)can be ... be defined in an appropriate way © 2013 Elsevier Ltd All rights reserved 1 Introduction In this paper we study the existence of traveling waves in van der Waals fluids with the effects of viscosity ... the right of the linev =b in the (v, w)-plane, seeFig 2 4.2 Estimating attraction domain First, we will define the elementary sets that include the estimates of the attraction domain as follows

Ngày tải lên: 16/12/2017, 15:06

... by distributing the first 0.254 mm depth, recorded following a rain-free period within an event, equally among each preceding minute Note the initial value defining the beginning of an event ... toallow infiltration of relatively high-intensity rainfall.Other disturbed, vegetated land covers havingintermediate values of Ks are potential sources forHOF during large rainfall events In general, ... property in the activation of flowpaths in almost all modes of streamflow generation (Elsenbeer and Lack, 1996; Elsenbeer, 2001) While the influence of Ks at the soil surface on the production of HOF

Ngày tải lên: 16/12/2017, 17:10

... saddle point We then develop the method of estimating attraction domain of the asymptotically stable equilibrium point for the compressible Euler equations and show that the saddle point in fact ... Multiplying(2.10)byv′, and using(2.2)and the third equation in (2.11), we obtain β Integrating(2.12)over(−∞,y)and using the first equation of(2.11), we get β 2w2= ε − ε−+p(v−,S−)(v − v−) −s2 Using ... sure that these regions Gεare included in the domain of the Lyapunov function(3.1) In fact, one has Gε⊂D, providing that the tangent line(∆)passing through the origin to the curveC: (v − v+)2+

Ngày tải lên: 17/12/2017, 14:25