numerical simulation of the flow field at the scale size of an individual copepod
Báo cáo " Numerical simulation of sediment transport and morphology changes at the Bach Dang estuary " ppt
... indicating that the waves are the dominant transport mechanism However, the tidal currents modify the transport patterns In the interior of the estuary, transport by tide dominates that of waves ... calculates tidal propagation; the current driven by the tide, waves, and wind; sediment transport; and bottom morphology change 91 Simulation specifications for circulation model and another one ... difference from the case with storm waves 9B, indicating the dominance of the waves in sediment transport The most notable difference between the two simulations (Figs 9, 10) is that the mud transported...
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Báo cáo nghiên cứu khoa học " Numerical simulation of sediment transport and morphology changes at the Bach Dang estuary " pdf
... indicating that the waves are the dominant transport mechanism However, the tidal currents modify the transport patterns In the interior of the estuary, transport by tide dominates that of waves ... calculates tidal propagation; the current driven by the tide, waves, and wind; sediment transport; and bottom morphology change 91 Simulation specifications for circulation model and another one ... difference from the case with storm waves 9B, indicating the dominance of the waves in sediment transport The most notable difference between the two simulations (Figs 9, 10) is that the mud transported...
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Numerical simulation of interfacial and multiphase flows using the front tracking method
... accuracy of the simulation results Therefore, it is of key importance that the front mesh has a more or less constant quality and uniform resolution throughout the duration of the simulation In ... multi-processing • Simulation of flows in an extended, wider range of Reynolds and Bond numbers for large, realistic ratios of the density and viscosity of the fluids: – Simulation of air bubbles rising ... our attention to the mathematical formulation of the model problem, which will be presented in Section 2.2 2.2 Model and governing equations This section will establish the mathematical formulation...
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Model development for numerical simulation of the behaviors of ph stimulus responsive hydrogels
... physical and chemical nature of the hydrogel The significances of those factors on the equilibrium deformation can be inferred by tracking the changes of the average curvature or dimension of the ... determined the deformation of polymer gel However, the behavior can be changed with the application of electric field They also gave a quantitative calculation of the bending, derived from the simple ... both hydrogel and bathing solution domain in response to chemical and electric potential changes Prior to the presentation of the mathematical model, a few of the significant mathematical models...
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Numerical simulation for the assessment of groundwater safe yield in red river delta, viet nam
... Q.108b (n) Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 Jan-12 -10 Q.109b (n) Time Figure 2.9: Time-series of monthly ... of water balance this research used the water balance equation to determine the groundwater safe yield Numerical simulation of a hypothetical case was used to demonstrate the natural groundwater ... parameters of the aquifers and the chemical composition of water [6] "Planning of water supply and sanitation in Nam Dinh province in 1999 – 2010 period" – report by the Center for Water and Sanitation,...
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báo cáo hóa học:" Numerical simulation of thin paint film flow" doc
... key issue In view of the complexity of the phenomena, experiments aiming at the identification of the physical effects within the film and the evaluation of their relative importance appear to be ... specially important at the beginning of the flash time when the viscosity of the paint is still relatively low At the end of the flash time, the leveling slows down until the topography of the layer ... complete simulation of the film evolution during the painting process, which demonstrated that the Newtonian model was able to reproduce the leveling of the paint layer accurately and that Marangoni...
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Numerical simulation of unsaturated flow using modified transformation methods
... such as the factor of safety of an embankment slope against translational and/or rotational failure With the limitations often exhibited by analytical solutions and the practical limitations of convergence ... solve the finite element formulation of the h-based form of Richards equation The performance of this combination approach is to be examined in the sense of convergence rate of the pore-water pressures ... with respect to changes of the net stress φb angle of internal friction with respect to changes of the matric suction χ factor related to the degree of saturation of the soil xxv Chapter Introduction...
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NUMERICAL SIMULATION OF CONTACT LINE PROBLEMS USING PHASE FIELD MODEL
... theoretical relation In the simulation, we find that the complicate relation of the static contact angle and the wettability of the boundary ρs can be well approximated by a simply linear relation ... It indicates that the thermodynamical interpretation for the theory of the static contact angle is reasonable and successful From the relation between analytic static contact angle and the wettability ... simulate the static contact line problems and verify the relation between the static contact angle and the wettabilities of the substrate in the liquid-vapor system without the gravity The numerical...
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Numerical simulation of steady and pulsatile flow through smoothly constricted tube
... in size and location with time due to the variation of the instantaneous flow rate There is no constant flow stationary point in the pulsatile flow The variation of Reynolds number can greatly ... significant impact on the flow behaviors for the physiological pulsatile flow The flow fields can be greatly affected by the flow rate at previous instants for the higher Womersley number The constriction ... is the flow rate, Qm is the mean flow rate, T is the time period of the pulsation and t is time This type of pulsatile flow was first used by Zendehbudi and Moayeri (1999) It is hoped to have the...
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numerical simulation of pulsed
... with the high laser energy density during bending Therefore, it is assumed that the thermal and mechanical problems are decoupled, so that the thermal analysis and the stress and strain calculation ... to the maximum at 60 ns, then decreasing to zero at the end of the pulse at 120 ns The local radiation intensity I(x,y,z,t) within the target is calculated considering exponential attenuation and ... Analysis The thermal analysis is based on solving the three-dimensional heat conduction equation The initial condition is that the whole specimen is at the room temperature ͑300 K͒ Since the left and...
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Numerical simulation of fracture in plain and fibre reinforced concrete
... generation of the geometry of the material (random placement of aggregates within the mortar) and the detailed discretisation of the elements to adequately reproduce the geometry of the interfaces ... Baˇant and Planas (1998) A study made by Elices and Planas (1996) showed that z within the practical range of laboratory size specimens, the size effect predictions of the size effect model (Baˇant, ... stated immediately following the derivation and formulation of mathematical expressions used in the thesis The following are assumed throughout: The formulation is applied to quasibrittle materials...
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báo cáo khoa học:" Numerical simulation of in vivo intraosseous torsional failure of a hollow-screw oral implant" pdf
... important clinically, as the one of the rationale behind fabricating such hollow-screw implants was to increase bone-implant contact and improve the biomechanical performance of these implants The ... torque of the implant in bone The force applied to the handle of manual torque wrench was transferred as "torque" to the bone-implant interface along the implant axis via the surgical- and rachet-adapter ... with bone so far In the present study, the authors assume that there has not been any limitation of quantification of failure torque in the clinic test, but the implementation of this informa- tion...
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Numerical simulation of submerged payload coupled with crane barge in waves
... salvaging of various offshore structures The stability of the floating crane in such situations is of outmost importance as it operates at sea and determination of the critical ranges of its operating ... further assumed that the crane vessel and the load move in a vertical plane and the amplitudes of the waves and the rigid body motion are small so that superposition can be applied Two mathematical ... force calculation scheme The remaining portion of the chapter describes the issues related to the successful implementation of the numerical simulation 2.1 Mathematical formulation The hydrodynamic...
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NUMERICAL SIMULATION OF LIQUID SLOSHING IN RECTANGULAR TANKS USING CONSISTENT PARTICLE METHOD AND EXPERIMENTAL VERIFICATION
... experimentally and theoretically The Lagrangian variational approach was used in the mathematical model by applying to the potential formulation of the fluid motion The theoretical solution of the mathematical ... many investigators Updating of the free surface is a key factor in the identification of the flow domain as well as in the application of free surface boundary conditions The 21 Chapter Literature ... density and viscosity of liquid in simulation of impact pressure of sloshing waves in the work of Lee et al (2007b) They concluded that the effects of viscosity and density ratio are insignificant,...
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Numerical simulation of vehicle hydroplaning and skid resistance on grooved pavement
... pressure and water film thickness 1.4 Organization of Thesis The organization of the report would be as follows: Chapter provides the background of the study of hydroplaning and skid resistance, the ... Hoe of the Transportation Engineering Laboratory; Mr Wang Junhong of the Supercomputing and Visualization Unit of the National University of Singapore Computer Center for their kind assistance and ... objective and the scope of research Chapter reviews the existing literature on the mechanism of skid resistance and hydroplaning, and the different factors that affect hydroplaning and skid resistance...
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A numerical simulation of underwater shock cavitation structure interaction
... vortex cavitation occurs at the tips of lifting surfaces and at the hubs of propellers and hydraulic turbines Tip vortex cavitation can be viewed as a canonical problem that captures many of the essential ... appropriate is obviously problem-related To taken into account the influence of the material properties, an approximate Riemann 19 CHAPTER MATHEMATICAL FORMULATION: NUMERICAL METHODS problem at the ... For the closure of (2.1), the equations of state are required for all mediums (phases) We assume the materials are characterized with an equation of state developed by Cochran and Chan (1979) and...
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Numerical simulation of sediment transport and morphological evolution
... - and ε -equations, the generation, transport and dissipation of the turbulence quantities in the flow field can be determined ˆ ˆ Since the introduction of the k − ε turbulence model into the ... implies that the turbulence is generated and dissipated locally and there is no transport of turbulence in the flow field The examples of using this model include Zhou (1995) and Zhou and Stansby ... Comparisons of the time histories of the normalized water surface elevation / H (a) at the center m, m and (b) at the corner 0, of the tank among the linear analytical solution (solid line), the...
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Numerical simulation of heat transfer characteristics under semi confined impinging slot jets
... particulate pipe flow by a Eulerian-Lagrangian mathematical model The turbulence of air flow was calculated by the standard k-ε model The predicted average heat transfer coefficients at the inner ... was found that the lateral heat conduction within the plate did not have any significant effect on the transmission of thermal fluctuations from the fluid in the plate and by this means a simple ... vortices emanating from the jet nozzle The correlation between the local heat transfer and the flow field was examined Some studies on the impinging jet flow and heat transfer with high Prandtl number...
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Numerical simulation of gel materials describing natural pattern formation
... study the buckling patterns of various annular plates to illustrate the undulating patterns of the leaves of flower cabbage and other numerical models mimicking the growth of apples, capsicums and ... (2000) further explored the original formation of patterns and managed to explain the pattern formation with the buckling theories of beams, plates and shells With the buckling mechanism, they successfully ... patterns of annular plates with various values of inner radius to outer radius ratio illustrate the relationship between the geometry of the annular plate and the inhomogeneous deformation of...
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Characterization and numerical simulation of gallium nitride based metal oxide semiconductor high electron mobility transistor with high k gate stack
... concentration and energy level of interface traps as well as thermal effects were investigated The simulation of the effect of stress due to the DLC liner on the performance of the GaN MOSHEMTs ... considerations in the design of the device and other test structures is done The fabrication of the device is then described followed by the characterisation techniques Characterisation of AlGaN/GaN ... would dictate the gate width of a transistor 3.1.1 Mesa Isolation The formation of the mesa is an important step that requires several considerations The mesa isolation defines the gate width (Figure...
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