... or even in a more constrained condition like an enclosed cylindrical container with one rotating endwall (LuccaNegro & O’Doherty, 2001) CHAPTER INTRODUCTION In this study, a particular interest ... and continuity equation, together with boundary and initial conditions Since only two parameters are involved (i.e Re and the aspect ratio Λ = H/R), and the domain is confined, the boundary conditions ... configuration - a confined cylindrical container with one rotating endplate, to study vortex breakdown structure, its stability and control strategies CHAPTER INTRODUCTION 1.2 Literature Review In this...
Ngày tải lên: 14/09/2015, 14:02
... cylinder wall is too thick to allow efficient heat exchange between the fluid inside the cylinder and its surroundings, there is a gradual rise in the temperature of the fluid, resulting in an increase ... proportional to its temperature, thus maintaining a constant resistance of the sensor implies that its temperature must also be kept constant If the resistance of the sensor in the Wheatstone ... motor controller through the real time I/O card during the experiments The height H of the flow domain can be varied infinitesimally by changing the position of the stationary bottom disk using...
Ngày tải lên: 14/09/2015, 14:02
Studies of vortex breakdown and its stability in a confined cylindrical container 3
... 3.1 Flow configuration in a confined cylinder with one rotating end 34 CHAPTER NUMERICAL SIMULATION METHOD Two kinds of rotating motions were considered: a constant rotation only and a constant ... with the continuity equation and appropriate boundary and initial conditions A cylindrical container with radius R and height H is completely filled with an incompressible fluid of constant density ... and kinematic viscosity ν (see Fig, 3.1) A cylindrical polar coordinate system (r, θ, z) is adopted, with the origin at the centre of the rotating end wall and the positive-z axis pointing towards...
Ngày tải lên: 14/09/2015, 14:02
Studies of vortex breakdown and its stability in a confined cylindrical container 4
... one of the following procedures, namely, (a) keeping the aspect ratio constant, while increasing the Reynolds number or (b) keeping the Reynolds number constant, while increasing the aspect ratio ... bubble eventually disappears In contrast, the shrinking downstream bubble resulted in the formation of a helical instability of increasing wavelength as the aspect ratio was increased, until an S-shape ... the flow domain, and the aspect ratio Λ = H/R, can be varied by moving the rotating disk to a predetermined location or continuously varying the position of the stationary disk using a micrometer,...
Ngày tải lên: 14/09/2015, 14:02
Studies of vortex breakdown and its stability in a confined cylindrical container 5
... that LC2 can be obtained by impulsively starting the rotating disk from rest, and likewise for Λ < 1.728 LC1 can be obtained in the same manner Depending on the initial starting condition, it is ... crossed In Fig 5.25, the “×” symbols represent LC2 states that resulted from continuing the LC1 state past the NS1 curve following a quasi-static increase in Λ Likewise, the “+” symbols in the ... that emerged following an impulsive start from rest By increasing Λ in quasi-steady increments from Λ = 1.716 to 1.739 to 1.762 to 1.78, the LC1 flow state was retained indefinitely Typical hot-film...
Ngày tải lên: 14/09/2015, 14:02
Studies of vortex breakdown and its stability in a confined cylindrical container 6
... parity To avoid including the origin in the collocation mesh, an odd number of GaussLobatto points in r is used and the equations are solved only in the interval [0, 1] Following Orszag and Patera ... time-splitting method proposed in Hughes and Randriamampianina (1998) combined with a pseudospectral method for the spatial discretization, utilizing a Galerkin-Fourier expansion in the azimuthal coordinate ... and the discontinuity in azimuthal velocity at the bottom corner has been regularized in order to achieve spectral convergence The governing equations have been solved using the second order...
Ngày tải lên: 14/09/2015, 14:02
Studies of vortex breakdown and its stability in a confined cylindrical container 7
... in Chapter In the present investigation, the Reynolds number was set at 2600 and below with the modulation amplitude A varying from 0.005 to 0.04, and the aspect ratio Λ was maintained at a constant ... harmonically forcing, a wide range of forcing frequencies was considered, with the forcing amplitude kept small, typically A ≤ 0.02 Having examined experimentally dozens of frequencies in the range ... are in phase (peaks matching in time), providing experimental evidence of the axisymmetric nature of the forced limit cycles Again, the response in all cases is a flow synchronous with the forcing,...
Ngày tải lên: 14/09/2015, 14:02
Studies of vortex breakdown and its stability in a confined cylindrical container 8
... prevalent, such as the tail buffeting problem 156 CHAPTER CONCLUSIONS AND RECOMMENDATIONS 8.2 Recommendations A confined cylindrical container driven by one rotating endwall has been used extensively ... understanding of the flow physics in the confined cylindrical container with one rotating endwall, there are still some issues that need to be addressed and explored The following are recommendation for ... transition in an enclosed cylinder driven by the constant rotation of an endwall is an interesting topic In our study, the Reynolds number considered is usually below 3000, where the flow remains axisymmetric...
Ngày tải lên: 14/09/2015, 14:02
Cadmium Removal by the Hydroponic Culture of Giant Reed (Arundo donax) and Its Concentration in the Plant
... observed during days in runs to Assimilation of cadmium in giant reed Fig shows the cadmium concentration in giant reed as a result of Run 6, indicating that the cadmium was highly concentrated in the ... Time courses of cadmium concentrations in culture broth in Run to are shown in Fig More than 60% of cadmium was removed within days in every run Assuming the zero-order kinetics, the average cadmium ... and investigate its concentration in plant body The dynamics of cadmium in soil zone is, however, complicated Firstly, the adsorption of cadmium on soil surface is expected and under reducing condition,...
Ngày tải lên: 05/09/2013, 10:17
Tài liệu Báo cáo khoa học: Key role of the loop connecting the two beta strands of mussel defensin in its antimicrobial activity docx
... comprising Ôresidues in the protruding domain consisting of the type VI b-turn and the first part of b-strand 3Õ (i.e the b-hairpin loop and part of the adjoining b-sheet) and Ôresidues in the loop connecting ... elucidated In conclusion, our results indicated that residues 23–35 of mussel defensin MGD1 play a key role in the binding to Gram-positive bacteria, inhibiting bacterial growth and permeabilizing bacteria ... family, exhibit a cysteine-bridged loop that also contain basic and hydrophobic residues: e.g CRIVVIRVC (bactenecin), CYRGIGC (tachyplesin), CRRRFC (buthinin), CTMIPIPRC (tigerinin), etc Also remarkable...
Ngày tải lên: 20/02/2014, 11:20
Báo cáo khoa học: Binding of cGMP to the transducin-activated cGMP phosphodiesterase, PDE6, initiates a large conformational change involved in its deactivation ppt
... In conclusion, these results strongly suggest that Pc binding accelerates the cGMP-binding-initiated conformational change in Pabc Together with the result showing that Pc inhibits cGMP-binding ... was incubated (s) Then, [3H]cGMP binding was initiated by adding indicated concentrations of [3H]cGMP (C-1) The [3H]cGMP binding in C-1 is analyzed by Scatchard plotting (C-2) • • • [3H]cGMP binding ... after changing its conformation, firmly holds the [3H]cGMP A large conformational change initiated by cGMP binding has been reported in one of GAF domains in cone PDE [24] A similar conformational...
Ngày tải lên: 06/03/2014, 00:21
Dynamic Planet Mercury in the Context of Its Environment docx
... Missions 23 Figure 2-2 Mariner 10 spacecraft, illustrating the spacecraft design described in the text: The instrument package, including cameras boom mounted instruments, including the magnetometer, ... non-rotating body results in a poorly constrained inverse problem) More recently, the magnetometer aboard the Global Surveyor Spacecraft recorded intrinsic, intense magnetization at Mars that was mainly ... prevailing understanding concerning planetary, dipolar, magnetic fields is that they are generated by electrical currents, induced by dynamo action in a thermally convecting, differentially rotating,...
Ngày tải lên: 06/03/2014, 19:20
Blackwell Publishing Ltd Reproductive asynchrony in natural butterfly populations and its consequences for female matelessness ppt
... butterflies within the meadow Sampling continued each year until fewer than five individuals per transect were counted Only in 2000 were females scored for mating status P smintheus was surveyed in a system ... c(·) shown in Table 1), for which sufficient data (> 10 censuses in a single season) were available for P clodius in 2000 and for P smintheus in 1996 only The remaining years of P smintheus data ... work in concert with asynchrony to exacerbate Allee effects in declining populations, but that protandry’s contribution is relatively small We therefore consider asynchrony per se to be the main...
Ngày tải lên: 22/03/2014, 12:20
STUDIES ON THE ECOLOGY AND CONSERVATION OF BUTTERFLIES IN EUROPE: Vol. 1: General Concepts and Case Studies pptx
... available early in season in temperate environments, such insects, including butterfly larvae, should be constrained in annual numbers of generations In contrast, no such constraint should apply ... EcologyAfrotropicalof&Butterflies(Eds) 2005 37 Studies on in the and Conservation Region in Europe Proceedings of the Conference held in UFZ Leipzig, 5-9th of December, 2005, p 37 Does voltinism in temperate insect herbivores ... flagship and indicator species in national and international monitoring programmes The protection of wetlands in Switzerland was decided in the Rothenthurm Initiative in 1987 Following this initiative,...
Ngày tải lên: 23/03/2014, 01:20
A BRIEF REVIEW OF CREATIVE ACCOUNTING LITERATURE AND ITS CONSEQUENCES IN PRACTICE pptx
... articles – the interval had in mind being contained between 1999 and 2009 The second stage consisted in grouping them on the most frequently approached themes Out of these, we mention aspects connected ... approach regarding the exploratory research includes two stages: The first consists in finding the information about creative accounting in the databases mentioned above the longitudinal classification ... “earnings management” whereas in Europe we are using the phrase “creative accounting” In the literature, creative accounting can still be found under the name of income smoothing, earnings smoothing,...
Ngày tải lên: 29/03/2014, 14:20
The role of international agreements in environmental conservation and its implication to Vietnam
... findings out of the thesis This thesis presents the following new findings (1) New findings related to theory (a) A new economic equation to relate two levels of sustainable management of economic ... for Consumption, OS for Original Sustainability, S for Sustainable Level for human activities ΔOS means the marginal increase of consumption against environmental amenity while original sustainability ... economic resource This thesis introduces a new concept of combining two types of sustainable management of natural resource in a single economic equation and also under a single diagram as represented...
Ngày tải lên: 20/04/2014, 20:22
Báo cáo hóa học: " Norm inequalities for the conjugate operator in two-weighted Lebesgue spaces" ppt
... (ξ ) g(z) = S Then, g is continuous on B ∪ Q By setting l = -ig(ξQ) in (3.1), we shall drive the conclusion By Minkowski’s inequality, we split the integral in (3.1) into two parts, σ (Q) ≤ 1/r ... improvement of the original manuscript Authors’ contributions KSR drove a sufficient condition for two-weighted norm inequalities for K In proving cross-weighted norm inequalities between the ... norm inequalities for the Poisson integral Trans Amer Math Soc 210, 225–231 (1975) Sawyer, ET: Two weight norm inequalities for certain maximal and integral operators In Harmonic Analysis (Minneapolis,...
Ngày tải lên: 20/06/2014, 22:20
Báo cáo khoa học nông nghiệp " Investigation of rice kernel cracking and its control in the field and during post-harvest processes in the Mekong Delta of Vietnam " docx
... not defined Institute Information Project Name Investigation of rice kernel cracking and its control in the field and during post-harvest processes in the Mekong Delta of Vietnam Vietnamese Institution ... post-harvest institutions to highlight the project objectives and also to obtain input from the extension workers on grain losses in relation to harvesting, drying and milling practices in Mekong Delta Introduction ... milling losses in two provinces The milling loss data were collected directly from three milling plants in each province (Kien Giang and Tien Giang) Since the work is being continued, the full...
Ngày tải lên: 21/06/2014, 06:20
Project Progress Report: " Investigation of rice kernel cracking and its control in the field and during post-harvest processes in the Mekong Delta of Vietnam - Ms5" pot
... fluidized-bed drying and final moisture content after thin layer drying Run no FD drying condition Temp/time Tempering condition Temp/time Moisture content after FD %wb Final moisture content %wb ... differential moisture content in the rice kernel during actual tempering may have more dominating effect than the molecular relaxation for minimising rice cracking This is being further investigated 10 ... losses in two provinces from three milling plants in each province (Kien Giang and Tien Giang) The same information was reported in the earlier monthly report Since the work is being continued,...
Ngày tải lên: 21/06/2014, 06:20
INVESTIGATION OF RICE KERNEL CRACKING AND ITS CONTROL IN THE FIELD AND DURING POST-HARVEST PROCESSES IN THE MEKONG DELTA OF VIETNAM " ppt
... Province Project: INVESTIGATION OF RICE KERNEL CRACKING AND ITS CONTROL IN THE FIELD AND DURING POST-HARVEST PROCESSES IN THE MEKONG DELTA OF VIETNAM Figure 1: Opening by Dr Truong Vinh, CARD 026/VIE05 ... combine-harvester at Tan Phat A co-operative, after training lesson Nong Lam University Ho Chi Minh city CARD Project 026/VIE05 Report on training program in July-2007 At Kien Giang Province ... 8:10: Declaration the reason of training program – Introduction the delegates, participants 8:10 – 8:15: Introduction the content of the training program (Dr Vinh Truong) 8:15 – 8:20: Statement...
Ngày tải lên: 21/06/2014, 06:20