Simulations of incompressible viscous thermal flows by lattice boltzmann method
Simulations of incompressible viscous thermal flows by lattice boltzmann method
... SIMULATIONS OF INCOMPRESSIBLE VISCOUS THERMAL FLOWS BY LATTICE BOLTZMANN METHOD PENG YAN (B Eng., M Eng., Nanjing University of Aeronautics and Astronautics, ... difficulties and lattice Boltzmann method is one of the outcomes Chapter Introduction 1.1.2.3 Lattice Boltzmann method The main difference between LGA and lattice Boltzmann method (LBM) is that ... compression work done by pressure and viscous heat dissipation can be neglected for ix incompressible thermal flows, a simplified IEDDF thermal model for the incompressible thermal flows was proposed...
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Simulation of multiphase and multi component flows by lattice boltzmann method
... model multiphase flows 1.2 Overview of lattice Boltzmann method To understand the lattice Boltzmann method, it is necessary for us to review some basic aspects of LBM first In history, the lattice ... models generated by this platform Chapter gives a detailed description of the modeling of multiphase flows by LBM There are three main methods to model multiphase flows by LBM Each method is evaluated ... CFD, that is naturally a demand to develop a lattice Boltzmann method to model multiphase flows In fact, several methods have been developed to model multiphase flows by LBM during the last twenty...
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Development of a flexible forcing immersed boundary lattice boltzmann method and its applications in thermal and particulate flows
... boundary – lattice Boltzmann method 15 1.6 Applications in thermal and moving boundary problems using immersed boundary – lattice Boltzmann method 17 1.6.1 Natural convection in a complex ... Immersed boundary – thermal lattice Boltzmann method IFEM Immersed finite element method IIM Immersed interface method ISLBM Interpolation-supplemented LBM LGCA lattice gas cellular automata LBE Lattice ... thermal flow problems such that both velocity and temperature boundary conditions are accurately satisfied 1.6 Applications boundary in thermal problems and using moving immersed boundary – lattice...
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Development of lattice boltzmann method for compressible flows
... 1.2 Lattice Boltzmann method 1.2.1 Basis of lattice Boltzmann method 1.2.2 Lattice Boltzmann models LB models for compressible ... kinetic method, direct simulation Monte Carlo, the lattice Boltzmann method, dissipative particle dynamics method, the molecular dynamics method, and so on 1.2 1.2.1 Lattice Boltzmann method Basis of ... because of the simple form of CF-VIIF This is a major advantage of our derivation method As shown in the next chapter, we will further extend this method to develop lattice Boltzmann models for compressible...
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Evaluation of Loading Rate of Nitrogen from Rice-Paddies by Small Watershed Method
... mineralization of organic nitrogen, as Kunimatsu et al (1991) indicated Storm-runoff loads Separate L(Q) method It is well known that loading rates of materials and flow rates - 119 - Journal of Water ... balance of TN was estimated from the results obtained from continuous observations for three years at a small watershed of rice-paddies MATERIALS AND METHODS Study site The experimental small rice-paddy ... CONCLUSIONS By combine of interval-loads method (ILM) and Separated L(Q)-equations method, the unit load of TN for rice-paddy was evaluated on the base of the data obtained from the experimental small...
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Báo cáo hóa học: " Effect of Dopant on the Nanostructured Morphology of Poly (1-naphthylamine) Synthesized by Template Free Method" potx
... well as by using alcohol as a medium for polymerization of conducting polymers These findings may provide valuable information in the template free synthesis of many other nanostructures The investigations ... used as a dopant plays a significant role in deciding the morphology of the nanostructure of PNA The aggregation of nanoparticles can be prevented by avoiding the use of highly acidic dopants such ... particles of varying sizes is observed; the later being in the range of 20–30 nm The spectral investigations also highlight the differences in the conformation, which govern the extent and nature of...
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Báo cáo hóa học: " Effect of Dopant on the Nanostructured Morphology of Poly (1-naphthylamine) Synthesized by Template Free Method" doc
... well as by using alcohol as a medium for polymerization of conducting polymers These findings may provide valuable information in the template free synthesis of many other nanostructures The investigations ... used as a dopant plays a significant role in deciding the morphology of the nanostructure of PNA The aggregation of nanoparticles can be prevented by avoiding the use of highly acidic dopants such ... particles of varying sizes is observed; the later being in the range of 20–30 nm The spectral investigations also highlight the differences in the conformation, which govern the extent and nature of...
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Development of immersed boundary phase field lattice boltzmann method for solid multiphase flow interactions
... Remarks 142 vi Chapter Application of Immersed Boundary- Phase Field- Lattice Boltzmann Method for Solid- Multiphase Flow Interactions 161 6.1 Solid- Multiphase Flow Interactions 162 6.2 Simulation ... layer formed on solid surface Chapter presents application of immersed boundary phase- field lattice Boltzmann method to study solid- multiphase flow interactions An introduction of solid- multiphase ... Modeling of Multiphase Flow 1.2.1 Navier-Stokes solvers for multiphase flow simulation 1.2.2 Lattice Boltzmann methods for multiphase flow simulation 1.2.3 Challenges faced by phase- field LBM...
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Development of a novel immersed boundary lattice boltzmann method and its applications
... Organization of The Thesis 23 Chapter Development of Efficient Lattice Boltzmann Method on Non-Uniform 25 Cartesian Mesh 2.1 Standard LBM 26 2.2 Taylor Series Expansion and Least Squares-base Lattice ... Non -Boundary Conforming Method 1.2.1 Sharp interface approach 1.2.2 Diffuse interface approach 1.2.2.1 Immersed boundary method 1.2.2.2 Force calculation in IBM 1.2.2.3 Advantages and disadvantages ... 1.2.2.3 Advantages and disadvantages of IBM The major advantage of IBM is its simplicity and easy implementation This is attributed to the decoupling of the solution of governing equation with the boundary...
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INVESTIGATION OF EXAFS CUMULANTS OF SILICON AND GERMANIUM SEMICONDUCTORS BY STATISTICAL MOMENT METHOD PRESSURE DEPENDENCE
... Fig 1a Pressure dependence of NND of Ge Fig 1b Pressure dependence of volume of Ge Fig 2a Temperature dependence of DWF of Ge Fig 2b Pressure dependence of DWF of Ge In Fig.3a, we plot the pressure ... INVESTIGATION OF EXAFS CUMULANTS OF SILICON AND 115 Fig 3b Pressure dependence of volume of Ge Fig 4a Temperature dependence of DWF of Ge Fig 4b Pressure dependence of DWF of Ge IV CONCLUSIONS ... of EXAFS cumulants of silicon and germanium crystals at zero pressure [12] The purpose of this work is to develop the SMM for calculating and analyzing the pressure dependence of cumulants of silicon...
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Tailoring of amorphous siox nanowires grown by rapid thermal annealing
... assisted SiOx nanowires grown after rapid thermal annealing at 900 °C for 60 s X-ray (EDS) analysis shows that the wire is mainly composed of Si and O, whereas the seed particle is constituted by Pt ... indicating the Si L23 ELNES of the nanowire and Si substrate In conclusion, SiOx nanowires have been successfully prepared by rapid thermal annealing with the use of Pt as catalysts, which initiate ... microscopy images of Pt/SiO2/Si structures after rapid thermal annealing at 900 °C for (a) 180 s, and (b) 300 s result indicates that the optimum heating time for the growth of SiOx nanowires is not...
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Synthesis and photoluminescence property of silicon carbon nanowires synthesized by the thermal evaporation method
... temperature to adjust the pore diameter and remove the barrier layer at the bottom of nanoholes 2.2 Synthesis of SiC nanowires The preparation apparatus for synthesis of SiC nanowires is a conventional ... image of SiC nanowires synthesized using the AAO template by thermal evaporation It reveals that large quantities of randomly distributed wire-like products have been obtained The nanowires are of ... several pure nanowires (Fig 5b) The presence of peaks demonstrates that the nanowires are composed of Si, C and small amount of O It is found that the molecular ratio of Si/C/O of the nanowires...
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Báo cáo hóa học: " Size Evolution of Ordered SiGe Islands Grown by Surface Thermal Diffusion on Pit-Patterned Si(100) Surface" doc
... Electron Microscopy 123 Conclusions In conclusion, we have investigated the growth of selfassembled SiGe islands on a pit-patterned Si(100) surface by surface thermal diffusion from a lithographically ... composition and strain state of islands grown by surface thermal diffusion on a pitpatterned surface, possibly addressed in future by Micro-Raman Spectroscopy and Transmission Electron Microscopy ... (Color online) a Volume distribution of individual ordered grown islands on a pit-patterned Si(100) surface, derived by AFM scans, as a function of the distance, x, from the stripe Green diamonds...
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Báo cáo hóa học: "ON SIMULATIONS OF THE CLASSICAL HARMONIC OSCILLATOR EQUATION BY DIFFERENCE EQUATIONS" docx
... method of solving difference equations with constant coeficients It consists in representing the equation in the form of a matrix equation of the first order The general linear discrete equation of the ... Damped harmonic oscillator and its discretization Let us consider the damped harmonic oscillator equation (1.1) Its general solution can be expressed by the roots λ1 , λ2 of the characteristic equation ... discretization of the damped harmonic oscillator equation In order to find the exact discretization of (1.1) we consider the general linear discrete equation of second order: xn+2 = 2Axn+1 + Bxn (6.1) The...
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