inviscid irrotational flow about an infinite cylinder

... heat transfer Gr and mass transfer Gc is to enhance the transient velocity of the flow field at all points An increase in Prandtl number Pr decreases the transient temperature of the flow field ... buoyancy effects of thermal and mass diffusion Soundalgekar and Wavre [4] investigated the unsteady free convection flow past an infinite vertical plate with constant suction and mass transfer ... past an infinite vertical plate with constant suction and mass transfer Int J Heat Mass Trans.1977, 20, 1363-1373 [5] Hossain M A., Begum R A Effect of mass transfer and free convection on the flow...

Ngày tải lên: 05/09/2013, 15:28

... digester, and β if viewed from the side right face Four simulations with change of direction flow have been performed: Simulation 1, with angles α=30º and β=11º Simulation 2, with angles α=0º and β=0º ... Hoffmann R, Drescher SR, DePaoli DW, Al-Dahhan MH Anaerobic digestion of animal waste: Effect of mixing Bioresour Technol 2005 96:1607–1612 [11] Karim K, Hoffmann R, Klasson KT, Al-Dahhan MH Anaerobic ... researching about the modeling of flow in anaerobic digester and the modelling of quality water E-mail address: almarmen@posgrado.upv.es Tatiana Montoya Martínez M.Sc and PhD in Hydraulic and Environmental...

Ngày tải lên: 05/09/2013, 14:59

... air and fuel (rich or lean mixture) So far, this research aims at the 3D numerical analysis of flow in two manifold geometries using a CFD code FloWorks is chosen for its capabilities flow analysis ... 3-Fuel flow meter, 4-LPG pipes Figure Intake manifold effect on air-LPG ratio and SFC Conclusion The main conclusions we can draw from this paper are the following: 1- The analysis of the flow and ... manifold influence on the engine performance The air-fuel ratio and the specific fuel consumption are measured and determined With the optimized manifold, both AFR and SFC are improved by % and...

Ngày tải lên: 05/09/2013, 16:30

... higher at the extreme angles and at lower heights (Figures 3B, 4B and Table 2) of the half -cylinder, resulting in an asymmetrical bowl-shaped distribution The mean AE and mean variance of the heights ... tested The angular mean AE and mean variance for all the locations on the cylinder are respectively 0.48° and 1.65° (mean SD = 1.13°) B 50 60 HEIGHT (mm) 70 80 90 80 60 40 20 -20 -40 -60 -80 ANGLE ... (mean and standard deviation – SD), root mean square (RMS) and maximum (max.) errors Heights Tested 10.00 20.00 30.00 Theoretical 40.00 50.00 60.00 70.00 80.00 90.00 Mean* (mm) Mean SD (mm) Mean...

Ngày tải lên: 19/06/2014, 10:20

... range of fields of engineering, because of its practical design applications, say, to highways and railways The analysis of the problem is thus of interest to many mechanical, civil engineers and, ... and the uniqueness of the deflection of an infinite beam resting on a both non-uniform and nonlinear elastic foundation by means of Banach fixed point theorem In fact, this restriction on the candidate ... (u, x) Finally, F4 implies that, for any x ∈ R, the spring constant fu (0, x) at (0, x) cannot become smaller than about 12.3% of the maximum spring constant k = supx∈R fu (0, x) This restriction,...

Ngày tải lên: 20/06/2014, 20:20

... range of fields of engineering, because of its practical design applications, say, to highways and railways The analysis of the problem is thus of interest to many mechanical, civil engineers and, ... and the uniqueness of the deflection of an infinite beam resting on a both non-uniform and nonlinear elastic foundation by means of Banach fixed point theorem In fact, this restriction on the candidate ... (u, x) Finally, F4 implies that, for any x ∈ R, the spring constant fu (0, x) at (0, x) cannot become smaller than about 12.3% of the maximum spring constant k = supx∈R fu (0, x) This restriction,...

Ngày tải lên: 21/06/2014, 20:20

... the orange glow of the bonfire Salleh, my other friend, brought out the snacks and drinks from a bag We had come to the beach to relax and enjoy ourselves A bonfire can be mesmerizing too and so ... stares of people on an ordinary street However all good things must come to an end The fire slowly died down and darkness regained its mastery We said goodbye to our visitors and cleaned up the fireplace ... good two hours eating, drinking, talking and singing around it A number of people appeared and we invited them to share in our little revelry We did not know any of them, but it did not matter All...

Ngày tải lên: 22/07/2014, 03:21

... the best textile manufacturing company Each room is fitted with a radio so that one can enjoy programs from the bed The drawing room is elegantly furnished with sofas, chairs and a central table ... television and the room can be used for viewing programs All the rooms are airy and air-conditioned The kitchen is beautifully done up It is fitted with electric grills and things can be stacked ... there is an artificial pool with a fountain spray One or two fish tanks are kept in the big porch to add the beauty of the place There is a garage at the side of the house for my car, cattle and poultry...

Ngày tải lên: 22/07/2014, 04:20

... case report and any accompanying images Authors' contributions AAG, AH and YAO were the physicians responsible for the care of the patient SH and FA were involved in executing and analyzing neuro-imaging ... revealed the presence of intransigent and persistent cognitive and behavioral dysfunctions, and poor response to electroconvulsive therapy, which could point to an organic pathology With the background ... has examined whether possessive states can be related to indices of cerebral blood flow This paper presents a case study of an Omani man who presented with an altered state of consciousness (believed...

Ngày tải lên: 11/08/2014, 14:21

Ngày tải lên: 29/11/2014, 06:57

Ngày tải lên: 20/08/2015, 00:37

... magnetohydrodynamic mass transfer flow past an infinite vertical porous plate in presence of suction and heat sink was studied by Das and his team [18] Recently, Das and his coworkers [19] analyzed the hydromagnetic ... mass transfer flow of a viscous fluid through a porous medium bounded by an oscillating porous plate in slip flow regime Sharma and Singh [15] estimated the unsteady MHD free convective flow and ... and heat transfer along a vertical porous plate with variable suction and internal heat generation Das and his associates [16] studied the mass transfer effects on MHD flow and heat transfer past...

Ngày tải lên: 09/09/2015, 10:32

... formation of Dean vortex and investigate the flow structure in the second bend of opposite curvature Cheng and Shi (1991) studied such flows using flow visualization only and in a Dean number range of ... and Wang and Yang (2005) and these are reproduced in Fig 1.4 and 1.5 respectively In Fig 1.4, the time series flow visualisation shows the unsteady oscillation of Dean vortex at De = 220 and = ... that the transition from a two-vortex flow to a four-vortex flow within a critical Dean number range is a symmetry breaking bifurcation process Both the two-vortex flow and four-vortex flow are...

Ngày tải lên: 14/09/2015, 08:37

... corresponding curvature ratio (RC/D) and flow turning angle ( ) are RC/D = 2.422 and 43.6O and RC/D = 1.667 and = 33.4O, RC/D = 1.933 and = = 53.1O for Test Section 1, 2, and respectively The entire test ... to an axial fan, using a flexible canvas tube to minimise vibrations from the fan transmitted upstream to the test section The uncertainty in the spatial measurement and probe position is about ... the flow at the duct inlet A row of 10 VGs were placed equi-distant to each other and pairs of VGs were angled towards 25 each other (or in a counter-rotating fashion) at an angle vg = 5O, 10O and...

Ngày tải lên: 14/09/2015, 08:37

... parameter and use it to study curved duct flows of different curvature ratios A better understanding of and its variation in curve ducts may lead to improved design in, say, elbow flow meters (see Hanssen ... normalized cross flow velocities (v/Um and w/Um) at the S-duct exit plane Flow visualisation using smoke wires were used to visualize the flow separation phenomenon on the near side wall and vortex ... coefficient distribution and normalized cross flow velocity measurements at the TS to TS duct exit plane can demonstrate this At Re = 4.73x104 and with VGs installed, Fig 3.16(a), 3.16(b) and 3.16(c) show...

Ngày tải lên: 14/09/2015, 08:37

... to better understand the flow and the swirl development This is discussed in the next section 4.3.2 Surface and Smoke Flow Visualization Fig 4.3(a) to (c) show the surface oil flow patterns at ... the S-duct Due to flow symmetry about the 50 mid-plane of the S-duct (the z/D = 0.0 plane), the flow visualization was conducted for the upper half of the near-side wall only, and the results are ... work of Anderson et al.(1982), Taylor et al (1982a) and the numerical work of Sugiyama et al.(1997) (in Japanese) Using an S-duct with curvature ratio RC/D = 7.0, duct turning angle = 22.5O and Re...

Ngày tải lên: 14/09/2015, 08:37

... internal planes within the S-duct where measurements were taken With the inlet plane denoted as Plane and the exit plane as Plane 9, the remaining Planes to are distributed at equal angular intervals ... S-duct Cross flow measurements on the subsequent Plane to shows this in Fig 5.8 to 5.11 respectively In Fig 5.8 and 5.9 for Plane and respectively, these planes correspond to planes immediately ... noted on Plane in Fig 5.7 On that plane, swirling flows is still present The presence and growth of the small vortex on Plane corresponds approximately to region C near the inflection plane of the...

Ngày tải lên: 14/09/2015, 08:37

... 10O and the tangential blowing and VG jet has Cm = 0.012 and 0.045, the effects of using vortex generators, tangential blowing and VG jets on the swirl flow can be clearly seen in Fig 6.14 and ... 0.012 and 0.045) in tangential blowing and VG jet Fig 6.5 and 6.6 summarizes the variation of ω with inclination angle vg, blow, jet for VGs, tangential blowing and VG jets at Re = 4.73x104 and ... stream-wise vortices, to improve flow uniformity, and to attenuate swirling flow at the S-duct exit 6.3 Results and Discussion 6.3.1 Flow separation The effects of the three flow control devices on the...

Ngày tải lên: 14/09/2015, 08:37

... critical Dean number range and the angular position along the curve duct at which Dean vortex forms can be determined quite accurately However, experimentalists are relying on flow visualisation and ... Chapter 3) can be extended and applied to curved ducts of larger angular bends (say 270O) to determine the critical Dean number and angular position at which Dean vortex forms When a pair of Dean vortex ... generators suppress flow separation and accompanied by changes in the configuration of near-wall stream-wise vortices The latter changes the side wall pressure distribution and hence the variation...

Ngày tải lên: 14/09/2015, 08:37