gas solid liquid solid two phase flows
principles of gas-solid flows
Ngày tải lên :
02/04/2014, 15:00
... phenomena associated with 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, ... processes involving collisions of solids Chapter is devoted to the momentum and charge transfer of gas- solid flows Various forces in gas- solid flows due to gas- particle interactions, particle-particle ... Fan, Liang-Shih Principles of gas solid flows / Liang-Shih Fan, Chao Zhu p cm Includes bibliographical references (p ) ISBN 0-521-58148-6 Two- phase flow Gas flow Bulk solids flow I Zhu, Chao, 1961-...
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An experimental study of pressure drop characteristics in vertical upward two phase and three phase flows
Ngày tải lên :
28/09/2015, 13:28
... taken for two phase liquid- liquid flows and three phase liquid- liquid -gas flows in slug and churn flow regime The experiment is started by filling hydraulic oil and tap water in the liquid storage ... and three phase (liquid- liquid -gas) pressure drop measurement in vertical pipe The two phase pressure drop experiment was conducted focusing on the phase inversion phenomenon The three phase pressure ... 4.2 Results of two phase flow experiment 37 4.2.1 Significance of hydrostatic and frictional pressure drop in two phase system 42 4.2.2 Wall shear stress for two phase liquid- liquid system 43...
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boiling heat transfer and two-phase flow, second edition
Ngày tải lên :
02/04/2014, 15:22
... tem p eratures TWO- PHASE FLOW Two- phase flows are classified by the void (bubble) distributions Basic modes of void distribution are bubbles suspended in the liquid stream; liquid droplets sus ... between two phases, K is the Boltzmann constant or the gas constant per molecule, and T is the absolute temperature In the case of vapor clusters (phase B) contained in a liquid phase (phase A), ... in gas phase direction power, Btu/hr perimeter for gas or liquid phase pressure, Ib/ft2 or psi pressure drop psi volumetric flow rate, ft3/hr heat transferred per unit time and volume to phase...
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separation of isotopes of biogenic elements in two-phase systems
Ngày tải lên :
01/06/2014, 10:54
... between gases and liquids, complicated by either PHEX reactions between a gaseous phase substance and its liquid solution, or PHEX reactions between a liquid and its vapor in the gaseous phase, ... have, with two outlet flows (e.g a liquid enriched with required isotope, and a gas (vapor) depleted of the same isotope), two inlet flows (liquid flow from the upper stage and a gas or vapour ... the gas liquid systems, eqs (1.32) and (1.33) refer to the instance when the X-material, in liquid or gaseous phase, respectively, is enriched in the heavy isotope If X-material is in solid phase, ...
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Two Phase Flow Phase Change and Numerical Modeling Part 1 pot
Ngày tải lên :
19/06/2014, 12:20
... radiation and convection The Two Phase Flow, Phase Change and Numerical Modeling proposed method solves simultaneously the heat equation for the three phases (solid, liquid and vapor), computing ... to the liquid state is given by: Two Phase Flow, Phase Change and Numerical Modeling r A ⋅ P − ϕL ( M, t ) = L L e d , r = x + y , z = πd (19) where A L is the absorbability on liquid ... of modeling on laser beam, evaporator coils, rarefied gas, flat miniature heat pipe, two phase flow, nanofluids, complex fluids, and on phase change in different aspects The approaches would...
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Two Phase Flow Phase Change and Numerical Modeling Part 2 pdf
Ngày tải lên :
19/06/2014, 12:20
... bends: ou = ( Pr )in − ( ΔPr ) l (2a) 34 Two Phase Flow, Phase Change and Numerical Modeling (P ) r ou = ( Pr )in − ( ΔPr )b (2b) For single phase, subcooled liquid and superheated vapour, the Darcy-Weisbach ... variable spacing and number of passes Internal heat transfer of phase changing refrigerant is high and varies 28 Two Phase Flow, Phase Change and Numerical Modeling with flow regimes occurring ... (Wang et al., 1996) and (Wang et al., 1997) 32 Two Phase Flow, Phase Change and Numerical Modeling Research at CanmetENERGY 3.1 Theoretical approach Two essential and most uncertain coil design...
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Two Phase Flow Phase Change and Numerical Modeling Part 3 doc
Ngày tải lên :
19/06/2014, 12:20
... determined by: ΔTm , I = ΔTm , II = (Tri - Two ) - (Tr - Tw ) T -T ln( ri wo ) Tr - Tw (Tr - Tw ) - (Tro - Twi ) T -T ln( r w ) Tro - Twi (35) (36) 72 Two Phase Flow, Phase Change and Numerical Modeling ... are increasingly underused from the coil front to rear because of their exposure to an 52 Two Phase Flow, Phase Change and Numerical Modeling increasingly cold air flowing across the coil In (Fig.19) ... capacity but this advantage is lost after approximately 30 minutes due frost growth 54 Two Phase Flow, Phase Change and Numerical Modeling Fig 22 Air pressure drop for different fin spacing (Fig...
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Two Phase Flow Phase Change and Numerical Modeling Part 4 pot
Ngày tải lên :
19/06/2014, 12:20
... time and volume ρ = density of gas σ = hard sphere diameter Subscripts * = other investigated features Superscripts = two dimentional phase = three dimentional phase ‘ = value of feature after ... Film Interfacial (liquid side) Interfacial (vapor side) Liquid Liquid-Wall Maximum Saturation Heat sink Total Vapor Vapor-Wall Wall Theoretical and Experimental Analysis of Flows and Heat Transfer ... coefficients for liquid flow in a rectangular microgroove coupled with the vapor flow in a vapor channel of a miniature two- phase device The results show that the effect of the vapor -liquid frictional...
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Two Phase Flow Phase Change and Numerical Modeling Part 5 pptx
Ngày tải lên :
19/06/2014, 12:20
... vapor 114 Two Phase Flow, Phase Change and Numerical Modeling pressure drop For the liquid, the velocity increase is important near of the evaporator extremity, which generates an important liquid ... of the liquid phase velocity along a microchannel In the evaporator section, as the liquid passage section decreases, the liquid velocity increases considerably On other hand, since the liquid ... of solidification were applied in order to understand the internal stress distribution in the solidifying steel strand below the mold The need for data with respect to the 122 Two Phase Flow, Phase...
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Two Phase Flow Phase Change and Numerical Modeling Part 6 pot
Ngày tải lên :
19/06/2014, 12:20
... 140 Two Phase Flow, Phase Change and Numerical Modeling Fig 13 presents the temperature distribution till solidus temperature inside a slab at two different positions in ... 40 K; solidus temperature = 1484ºC; (all temperatures in the graph are in ºC) 142 Two Phase Flow, Phase Change and Numerical Modeling Fig 16 presents the temperature distribution till solidus ... between the solidus and liquidus temperatures; in part (b), the solid fraction fS, the local cooling-rate CR, and the rate of shell growth dS/dt are presented; in part (c), the local solidification...
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Two Phase Flow Phase Change and Numerical Modeling Part 7 potx
Ngày tải lên :
19/06/2014, 12:20
... on the solid hot plate changes with Reynolds number 186 14 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH In Fig is plotted the evolution of Nu along the solid hot ... of the area-weighted average Nusselt number along 184 12 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH the solid hot plate On the one hand, the Nusselt number will ... simulations of the impingement of a non-swirling jet against a solid wall Their results are later validated by Particle Image 174 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH...
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Two Phase Flow Phase Change and Numerical Modeling Part 8 ppt
Ngày tải lên :
19/06/2014, 12:20
... Swirl Angle 202 Two Phase Flow, Phase Change and Numerical Modeling From Figure 10, it is quite evident that the CRZ acts as a solid body around which the strong swirling jet flows This is important, ... higher temperatures occur in areas of the LP where the helium gas jets are able to reach the bottom Thus, the peak 212 Two Phase Flow, Phase Change and Numerical Modeling temperature corresponds ... Transfer and Flow Mixing Fig 12 Impact of Re and θ on Azimuthal Velocity Field 203 204 Two Phase Flow, Phase Change and Numerical Modeling The single-jet computation domain consisted of a right...
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Two Phase Flow Phase Change and Numerical Modeling Part 9 pot
Ngày tải lên :
19/06/2014, 12:20
... pattern nearly 236 20 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH remains unchanged and the slopes s as well Also these observations not dismiss that two populations ... during the picosecond time period 246 Two Phase Flow, Phase Change and Numerical Modeling Fig The temporal evolution of electron and phonon temperature fields in two layer Au/Ag film assembly (A) ... represents constant coupling strength) 252 Two Phase Flow, Phase Change and Numerical Modeling Fig.10 shows surface electron and phonon temperatures of the two layer Au/Al assembly at center of laser...
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Two Phase Flow Phase Change and Numerical Modeling Part 10 doc
Ngày tải lên :
19/06/2014, 12:20
... 275 (Faulkner et al., 2003) Two Phase Spray Cooling 20-40 1200 (Pais et al., 1992) Two Phase Jet Impingement 28 1820 (Overholt et al., 2005) Two phase Two Phase Two Phase Table Cooling Techniques ... gravitational H homogeneous model h heated wall in inlet l only -liquid lo liquid- only tot total two- phase 1φ single -phase region 2φ two- phase region 12 References Ambrosini, W., Di Marco, P & Ferreri, ... labs) 272 Two Phase Flow, Phase Change and Numerical Modeling All these delayed effects combine in single -phase pressure drop term and two- phase pressure drop term acquiring 180° out-of -phase fluctuations...
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Two Phase Flow Phase Change and Numerical Modeling Part 11 pdf
Ngày tải lên :
19/06/2014, 12:20
... if the gas phase is another liquid, immiscible with the droplet of the first liquid phase 314 Two Phase Flow, Phase Change and Numerical Modeling γ LG θ γ SL γ SG Fig Contact angle of a liquid ... transfer, especially a twophase heat transfer In the two- phase states, there are triple contact lines (TCL), which are the inter-connected lines for all three phases; liquid, gas, and solid All TCL can ... There are two main types of solid surfaces with which liquids can interact: high and low energy type solids The relative energy of a solid has to with the bulk nature of the solid itself Solids...
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Two Phase Flow Phase Change and Numerical Modeling Part 12 pot
Ngày tải lên :
19/06/2014, 12:20
... 320 Two Phase Flow, Phase Change and Numerical Modeling 3.2 Two- phase heat transfer 3.2.1 Evaporation Evaporation is one of major two- phase heat transfer mechanisms ... the liquid film in micro-scale two phase flows are not fully understood, and thus designing two- phase flow systems still remains as a difficult task It is reported that the thickness of the liquid ... Bankoff, S G (1967) Ebullition from solid surfaces in the absence of a pre-existing gaseous phase Trans Am Mech Eng., Vol 79, pp 735-740 336 Two Phase Flow, Phase Change and Numerical Modeling...
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Two Phase Flow Phase Change and Numerical Modeling Part 13 docx
Ngày tải lên :
19/06/2014, 12:20
... between predicted and measured initial liquid film thicknesses δ0 in accelerated flows Liquid Film Thickness in Micro-Scale Two- Phase Flow 363 In square tubes, liquid film formed at the center of ... Predicted initial liquid film thickness δ0 by Eq (21) Fig 11 Comparison between predicted and measured initial liquid film thicknesses δ0 353 Liquid Film Thickness in Micro-Scale Two- Phase Flow 3.2 ... 358 Two Phase Flow, Phase Change and Numerical Modeling agreement, which proves that both methods are effective to measure liquid film thickness very accurately From the analogy between flows...
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Two Phase Flow Phase Change and Numerical Modeling Part 14 pdf
Ngày tải lên :
19/06/2014, 12:20
... pressure drop of two- phase flow in adiabatic region (Zhang & Webb, 2001), the Tran correlation (Eq 23) for the friction pressure drop of two- phase flow in 384 Two Phase Flow, Phase Change and ... class of Solid/ Liquid colloidal systems where a solid phase is very finely dispersed in a continous liquid phase Most of nanofluids are prepared by direct injection of nanoparticles in the host liquid, ... Behaviour Of Single -Phase And Two- Phase Natural Circulation Loops 2nd RCM on the IAEA CRP ,Corvallis, Oregon State University, USA Zhang, M.; Webb, R.L (2001) Correlation of two- phase friction for...
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Two Phase Flow Phase Change and Numerical Modeling Part 15 doc
Ngày tải lên :
19/06/2014, 12:20
... 438 Two Phase Flow, Phase Change and Numerical Modeling for such a dramatic thermal conductivity increase by engaging additional heat transfer mechanism in suspensions Nanoemulsions (liquid/ liquid ... regard to the friction forces that dissipate more energy within the liquid thereby increasing its temperature 414 26 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH φ φ0 ... heat-conduction enhancement for liquid with nano-particle suspensions, J of Thermal Science 11: 214–219 White, F (1991) Viscous fluid flow, 2nd edn, McGraw-Hill 418 30 Two Phase Flow, Phase Change and Numerical...
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Two Phase Flow Phase Change and Numerical Modeling Part 16 docx
Ngày tải lên :
19/06/2014, 12:20
... The values of Kapitza resistance are constant for the particular solid/ liquid interface and defined by the strength of solid- liquid interaction and can be correlated to the wetting properties ... conductivity (35) 460 Two Phase Flow, Phase Change and Numerical Modeling Let us apply the previous formalism for the heat transfer in nanofluids, assuming the following: (i) there are two different ... speed field with the fractal coordinates (b) 466 Two Phase Flow, Phase Change and Numerical Modeling The presence of the interface couples together the two previous Equations (60) and (61) in the...
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