4phenomenology of gas liquid flow

... DIRECT NUMERICAL SIMULATIONS OF GAS LIQUID MULTIPHASE FLOWS Accurately predicting the behavior of multiphase flows is a problem of immense industrial and scientific interest Using ... refining of aluminum and copper A significant fraction of the energy needs of mankind is met by burning liquid fuel, and a liquid must evaporate before it burns In almost all cases the liquid is ... Figure 1.9 shows one example of a computation of the splash made when a liquid droplet hits a free surface, done by a modern VOF method We will discuss the use of VOF extensively in later chapters...

Ngày tải lên: 28/03/2014, 09:20

... gas- solid flows, as well as characteristics of selected gas- solid flow systems It covers the typical range of particle sizes of interest to gas- solid flows, i.e., ^m-10 cm, recognizing that flow ... Hopper-Standpipe-Discharger Flow 8.3.4 Multiplicity of Steady Standpipe Flows 8.3.5 Leakage Flow of Gas in a Standpipe 8.4 Types of Standpipe Systems 8.4.1 Overflow and Underflow Standpipes 8.4.2 Inclined Standpipe ... Profiles of Cross-Sectional Averaged Voidage 10.4.2 Radial Profiles of Voidage and Solids Flux 10.4.3 Overall Solids Holdup 10.5 Local Solids Flow Structure 10.5.1 Transient Nature of Solids Flow...

Ngày tải lên: 02/04/2014, 15:00

... diameter of pipe W = Weight flow rate of fluid C f = Compressibility of a fluid C g = Compressibility of a gas K = Constant for expressing the compressibility of a gas M = Molecular weight of gas ... y2 and incremental length is l2 – l1 Flow occurs from point (1) to point (2) Uphill flow of gas occurs in gas transmission lines and flow from the foot of a gas well to the surface The pressure ... Static behaviour of natural gas and its low in pipes 459 Direct calculation of the gas volumetric rate The rate of gas flow through a pipe can be calculated if the pipe properties, the gas properties,...

Ngày tải lên: 27/07/2014, 23:44

... Natural gas Natural gas is a vital component of the world's energy supply In 2005, natural gas supplied 20.9 percent of total world energy consumption [34] Natural gas is composed primarily of methane ... time of fuel injection and the initial mass and composition of gas within the vessel The ambient gas at injection in this example had average temperature of 750 K and pressure of MPa Premixed gas ... different of Ti not affect penetration length of both gaseous fuels The various penetration lengths of hydrogen jets are much more than those of natural -gas jets under the variation of dN and...

Ngày tải lên: 06/06/2016, 17:55

... growth of both patients Patient received emergent cesarean section at 24 weeks of gestation because of sudden premature rupture of the membrane Therefore the birth weight 263 of the child of patient ... with a diagnosis of threatened abortion at 17 weeks of gestation In spite of bed rest, disinfection therapy, and the administration of ritodrine, she suffered from pPROM at 23 weeks of gestation ... network of vessels No difference between the patients could be detected for the blood flow distribution Are these networks of new vessels sufficient for the maintenance of pregnancy? A decrease of...

Ngày tải lên: 25/10/2012, 11:48

... surface profile of flow with air-core 34 vortex In this study, the water surface profile of a steady air core vortex flow into a vertical intake was derived through out a depth-averaged model of open ... profile analysis of open channel flows over a circular surface Journal of Applied Mechanics, JSCE, Vol 8, pp 847-854, 2005 Anh T N and Hosoda T.: Free surface profile analysis of flows with air-core ... surface of flow with different discharges at the intake…….63 Water surface of flow with different velocity at the outer-zone boundary………………………………………………………… 63 Figure 5.7 Water surface of flow with...

Ngày tải lên: 06/11/2012, 10:35

... Calorific Value of coal = 14840 kJ/kg Carbon fraction of coal = 0.849948 Carbon fraction of natural gas = 0.75 Combustion efficiency of coal = 26% Combustion efficiency of natural gas = 80% Gas Turbine: ... in counter flow direction of the gas turbine exhaust gases Figure shows the temperature distribution in a single pressure HRSG The mass of the steam generated from the exhaust of gas turbine ... HRSG, mg is the mass of gas (kg), hg is the enthalpy of gas at the inlet to the HRSG (kJ/kg), hstk is the enthalpy of gas at the stack conditions (kJ/kg), ms is the mass of steam generated in...

Ngày tải lên: 05/09/2013, 15:28

... number of collisions per particle (a measure of time), given by t τ≡ T 1/2 (t ) dt The use of this measure of time renders the equations of motion linear The three eigenvalues of this system of ... properties of granular gases, some of which are presented below However, to the extent that the two can be considered to be similar, granular gases comprise a valuable model for studies of molecular gases; ... of granular gases does not need a justification based on an analogy with molecular gases The theoretical descriptions of granular gases are at least as varied as those of molecular gases, ranging...

Ngày tải lên: 01/11/2013, 08:20

Ngày tải lên: 12/01/2014, 22:19

... has two atoms of hydrogen and one of oxygen combined together Similarly, methane gas, which forms the main part of natural gas, is made up of one atoms of carbon and four atoms of hydrogen So ... characteristics of the fuel and the way it burns Table 1.4 below provides the comparison of properties of typical gases Table 1.4 Comparison of Properties of Typical Gases Natural Gas Commercial ... between the number of molecules and the volume of gases, the equation shows the volumes of gases involved So, FIGURE 2.4 Combustion of methane 18 Combustion FIGURE 2.5 The volumes of gases involved...

Ngày tải lên: 16/02/2014, 07:20

... analysis The analysis of the microarray results presented in Table required the use of an arbitrary ‘cut-off’ value for level of gene expression, an approach that introduces an element of bias into the ... expression profile of cells expressing the VV-II mutant form of STAT2 was more similar to that of U6A cells than that of U6A-2 cells (Level 1) IFN treatment led to the further segregation of the sample ... number of genes in U6A and U6A-2 cells, IFN-treated U6A-VV-II cells showed the down-regulation of a substantially larger subset of genes Identification and characterization of a subset of ISGF3-independent...

Ngày tải lên: 19/02/2014, 07:20

... hence the rate of accumulation of component i in V is Rate of change of d moles of compo- = dt nent i in V np φ V xij ρj Sj dV (2.1.5) j=1 Convection Terms Part of the accumulation of component ... of the porous medium bounded by a surface, S(t) A material balance on component i in the control volume can be stated as Rate of change of amount of component i in V (t) = Net rate of inflow of ... in the presentation of the important ideas Much of the material in this book that describes flow of gas/ oil mixtures follows from the work of an exceptionally talented group of graduate students:...

Ngày tải lên: 05/03/2014, 18:20

... presence of shallow gas or seepage Volcano-shaped structure of mud that has been forced above the normal surface of the sediment, usually by escaping gas Positive seabed features composed of sediment ... the high supply of methane leads to higher rates of Anaerobic Oxidation of Methane (AOM) in surface sediments For gas- hydrate bearing sediments on Hydrate Ridge off the coast of Oregon it has ... environments often support surprisingly high densities of macrofauna Estimates of density vary with the mesh size employed but values of >10,000 ind m–2 are common and local patches of >40,000...

Ngày tải lên: 15/03/2014, 19:20

... duct friction Equation of State In most of this book we consider all liquids as having constant density and all gases as following the perfect gas equation of state Thus, for liquids we have the ... definition (final value of N)t+ dN ≡ lim t→0 dt − (initial value of N)t t t (2.13) where the final value of N is the N of regions and computed at time t + the initial value of N is the N of regions and ... this form of the continuity equation in several future derivations 2.6 CONSERVATION OF ENERGY The first law of thermodynamics is a statement of conservation of energy For a system composed of a given...

Ngày tải lên: 17/03/2014, 14:01

... Increases in Assabet River flows were small, with reductions in the wastewater component of flow in September of percent or less 2 Simulation of Ground-Water Flow and Evaluation of Water-Management ... estimate of direct runoff Use of PART in an estimate of direct runoff assumes that anthropogenic effects on streamflow (for example, increased wastewater discharge to the river from storm inflow ... between streamflows at largely unregulated, long-term stations and at study sites assumes that flow components of nonstorm streamflow other than base flow at the study sites are of negligible...

Ngày tải lên: 17/03/2014, 15:20

... insulating grains The ratio of the slopes of straight lines, A/B, gives the ratio of reaction rate constants (k2 ) of H2 and CO; k2 of H2 is analyzed to be 14 times as large as that of CO Similar H2 response ... processing of materials toward innovations of gas sensors Micro-platforms fabricated with MEMS techniques are almost ready to be used in gas sensors Excellent heating and cooling characteristics of them ... Theory of power laws for semiconductor gas sensors, Sens Actuators B: Chem 128 (2008) 566–573 [6] N Yamazoe, K Shimanoe, Roles of shape and size of component crystals in semiconductor gas sensor...

Ngày tải lên: 20/03/2014, 13:05

... L113B as a soft template [17] Wan et al have proposed a soft-template-assisted hydrothermal route to prepare single crystal nanorods with an average diameter of 25 nm and length of 200 nm at ... images of the as-prepared sample at different magnifications Fig 2(a) is a low-magnification view of the product, showing that the sample is composed of uniform spheres with an average diameter of ... that of micrometric sample It is well known that a large surface area is important for the improvement of reaction performance, considering the introduction of lithium ions into the holes of the...

Ngày tải lên: 20/03/2014, 13:06

... by means of system, which consists of measuring camera, multimeter Keithley-2010 and PC Results and discussion The XPS-spectra of W4f- and O1s-levels of the samples and the results of their decomposition ... the results of decomposition of W4f-line in the annealed and non-annealed samples The maxima of peak couples correspond to W4f7/2 - and W4f5/2 -levels of tungsten atoms for W5+ -states of oxide ... surface of stoichiometric tungsten oxide is formed only of W6+ states of WO3 -phase (comps d-d , Fig 2-4) A signal from WO3 ·(OH2 )n is absent (comps e-e , Fig 2-4) The results of decomposition of...

Ngày tải lên: 20/03/2014, 13:12

... of view, this is associated with formation of such domains with denser packing of lipids The increase of viscosity or decrease of fluidity of membrane lipids in the processes of penetration of ... transition of the lipid bilayer of plasmatic membranes of liver cells of mice in vitro The changes of structural parameters, namely, the order parameter of surface and micro-viscosity of hydrophobic ... degradation of BR in a polluted atmosphere runs in three directions: 1) the action of NO2 alone, 2) the action of O2, 3) the combined (synergetic) action of these gases The general scheme of the process...

Ngày tải lên: 28/03/2014, 10:20

... polymer A101 was mg/l 3.4 The flow sheet of the treatment of the liquid radioactive waste Nong Son uranium ore processing The flow sheet of the treatment of the liquid radioactive waste Nong ... had proposed the flow sheet of treatment of the liquid radioactive waste Nong Son uranium ore processing In this flow sheet, the two stages precipitation processing with the use of PAC and polymer ... content of polymer, we had proposed the suitable factors for the treatment processing of radioactive liquid waste of Nong Son uranium ore processing as following: - The flow sheet with two stages of...

Ngày tải lên: 28/03/2014, 15:20