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Continuous-Scale Kinetic Fluid Simulation

2018 IEEE Transactions on Visualization and Computer Graphics  
To achieve flexibility, we propose a novel continuous-scale formulation that enables samples at arbitrary resolutions to easily communicate with each other in a more continuous sense and with loose geometrical  ...  Kinetic approaches, i.e., methods based on the lattice Boltzmann equations, have long been recognized as an appealing alternative for solving incompressible Navier-Stokes equations in computational fluid  ...  Fig. 1 . 1 Smoke simulation using our continuous-scale kinetic fluid simulator.  ... 
doi:10.1109/tvcg.2018.2859931 pmid:30047885 fatcat:7oaindn32nb65a7qr2fewi4wxm

The computational complexity of traditional Lattice-Boltzmann methods for incompressible fluids [article]

Marco Tessarotto, Enrico Fonda, Massimo Tessarotto
2008 arXiv   pre-print
These kinetic models can be continuous or discrete in phase space, yielding respectively continuous or discrete kinetic models for the fluids.  ...  Particle simulation methods rely typically on appropriate kinetic models for the fluid equations which permit the evaluation of the fluid fields in terms of suitable expectation values (or momenta) of  ...  These kinetic models can be continuous or discrete in phase space, yielding respectively continuous or discrete kinetic models for the fluids.  ... 
arXiv:0806.4821v1 fatcat:n347m5fsijearhaiqx7hcndrii

Computational Fluid Dynamics (CFD) Application in Fluid/Particle Flow Systems

Hamid Arastoopour
2013 Journal of Powder Metallurgy and Mining  
In spite of recent advances in computational capability, development of more general simulations, and design and scale-up tools for particle flow systems continues to pose a considerable challenge due  ...  In addition, CFD has played a significant role in shortening the gap between fluid/ particle processes laboratory-scale and commercialscale.  ...  In spite of recent advances in computational capability, development of more general simulations, and design and scale-up tools for particle flow systems continues to pose a considerable challenge due  ... 
doi:10.4172/2168-9806.1000e110 fatcat:qz2pxxozeff4te7tzbw6gur6uy

Stage Holdup of Dispersed Phase in Disc & Doughnut Pulsed Column

R.K. Saini, M. Bose
2014 Energy Procedia  
To that end, CFD based numerical simulations are carried out on disc and doughnut pulsed column with different operating condition and for two pairs of fluids i.e. ρc/ρd < 1 and ρc/ρd >1.  ...  Both continuous and dispersed phases are treated as inter-penetrating continua. The effect of turbulence on the continuous phase is captured using low Reynolds number k-ε model.  ...  Separate simulations are performed with only the continuous phase to determine the distribution of the turbulent kinetic energy in the column.  ... 
doi:10.1016/j.egypro.2014.07.323 fatcat:iy46hk6kjbfidofymgspmfqe6e

Continuum kinetic and multi-fluid simulations of classical sheaths

P. Cagas, A. Hakim, J. Juno, B. Srinivasan
2017 Physics of Plasmas  
The work presented here demonstrates that the kinetic and fluid results are in agreement for the momentum flux, showing that in certain regimes, a multi-fluid model can be a useful approximation for simulating  ...  There are differences in the electrostatic potential between the fluid and kinetic results.  ...  Useful discussions with Greg Hammett of PPPL and Wayne Scales of VT are acknowledged.  ... 
doi:10.1063/1.4976544 fatcat:kyrfspjgfjallg6nneer3ztaxa

Kolmogorov cascade and equipartition of kinetic energy in numerical simulation of Superfluid turbulence

J Salort, E Levêque, P -E Roche
2011 Journal of Physics, Conference Series  
The turbulence of a superfluid is investigated by direct numerical simulations at finite temperature and high Reynolds numbers using the continuous model.  ...  As the temperature decreases, the Kolmogorov cascade remains present at large scales while, at small scales, the system evolves towards a statistical equipartition of kinetic energy among spectral modes  ...  Approach & Results We simulated the continuous equations for superfluid at finite temperature by DNS at resolution up to 512 3 .  ... 
doi:10.1088/1742-6596/318/9/092031 fatcat:vbcn3wp5nnhing4epjh524uese

Computational Fluid Dynamic Application in Scale-up of a Stirred-batch Reactor for Degumming Crude Palm Oil

Yuswan Muharam, Aditya Kurniawan
2016 International Journal of Technology  
The simulation results of this small reactor yielded a fluid Reynolds number in the range of 5 to 3,482.  ...  To achieve this aim, computational fluid dynamic modeling and simulations of the two reactors were performed.  ...  In this work, therefore, computational fluid dynamics (CFD) is used to simulate the flow in the differently scaled reactors used for degumming.  ... 
doi:10.14716/ijtech.v7i8.6898 fatcat:ftncskigt5dhfjaniivpa2vid4

The Fluid-Kinetic Particle-in-Cell method for plasma simulations

Stefano Markidis, Pierre Henri, Giovanni Lapenta, Kjell Rönnmark, Maria Hamrin, Zakaria Meliani, Erwin Laure
2014 Journal of Computational Physics  
The Maxwell's and multi-fluid equations are discretized implicitly in time enabling kinetic simulations over time scales typical of the fluid simulations.  ...  A new method that solves concurrently the multi-fluid and Maxwell's equations has been developed for plasma simulations.  ...  Because of the implicit discretization in time, the fluid-kinetic PIC solver allows to use large time steps enabling kinetic simulations over time scales typical of the fluid simulations.  ... 
doi:10.1016/ fatcat:3z5r7traunbhrmk2zufetrdtie

On the numerical simulation of turbulent pipe flow pattern using Comsol Multiphysics

LATEEF OLAJUWON MUSTAPHA, Olorunyomi John Adekanle, A A Adetoyinbo, Tosin Olusola Kolebaje
2013 International Journal of Scientific World  
The governing equations and the k.ε model which accounts for the turbulent kinetic energy k and turbulent dissipation rate ε were solved using the simulator.  ...  The behaviors of the fluid were investigated at radius of 0.23m, 0.33m, and 0.38m respectively near the pipe wall to study its possible impact on the pipe wall.  ...  The flow field is assumed to satisfy the continuity and momentum equation for an incompressible fluid.  ... 
doi:10.14419/ijsw.v1i2.1013 fatcat:r37yhdkkdvhqbits6hg7gcpvda

Paddy Drying in Batch Fluidized Bed and Scale-up Simulation in Continuous Operation Mode

Suherman Suherman, Mohammad Djaeni, Dyah Hesti Wardhani, Andri Cahyo Kumoro
2017 KnE Life Sciences  
The objective of this research is to develop the industrial-scale fluid bed dryer for paddy by scale-up of lab-scale experimental data.  ...  Keywords: Paddy; fluid bed dryer; batch, contonious; modelling; simulation  ...  Simulation Design of Continuous Dryer Furthermore is the design of a continuous dryer for plant scale (SMEs). Table 2 shows the design parameter of continuous fluid bed dryer.  ... 
doi:10.18502/kls.v2i6.1064 fatcat:elhg54evnzfqpfggdyh6ji3pxm

Mesoscale equipartition of kinetic energy in quantum turbulence

J. Salort, P.-E. Roche, E. Leveque
2011 Europhysics letters  
Direct numerical simulations are performed with a "truncated HVBK" model, which combines the continuous description of the Hall-Vinen-Bekeravich-Khalatnikov equations with the additional constraint that  ...  The accumulation of superfluid excitations on a range of mesoscales enables the superfluid to keep dissipating kinetic energy through mutual friction with the residual normal fluid, although the later  ...  Both fluids undergo a common inertial cascade, similar to Kolmogorov cascade in ordinary fluids. This cascade carries kinetic energy from the largest scales of the flow down to smaller scales.  ... 
doi:10.1209/0295-5075/94/24001 fatcat:rjx5vme3jzbzrnkdwjfomzoeoi

A kinetic interpretation of the classical Rayleigh-Taylor instability [article]

John Rodman, Petr Cagas, Ammar Hakim, Bhuvana Srinivasan
2022 arXiv   pre-print
For long mean-free-path, there is no RT instability growth, but as collisionality increases, particles relax towards the Maxwellian velocity distribution, and the kinetic simulations reproduce the fluid  ...  simulation results.  ...  With no perturbation, the interface continues to diffuse until the fluid layers mix completely.  ... 
arXiv:2205.01815v1 fatcat:comlfmjvtbalzlicxfenvusw7a

Flow characteristics of curved ducts

Rudolf P., Desová M.
2007 Applied and Computational Mechanics  
Simulations were verified with experimental results presented in literature.  ...  Flow simulation using CFD techniques were performed to understand these phenomena.  ...  Continuity equation must be fulfilled and fluid near walls starts to move from the inner to outer radius. This process suppresses original vortex pair.  ... 
doaj:4665801055a0491694c2d9e1d1c7d4d0 fatcat:bvsf5zde4jcrbgahr4rnlocjwe

SWIFF: Space weather integrated forecasting framework

Giovanni Lapenta, Viviane Pierrard, Rony Keppens, Stefano Markidis, Stefaan Poedts, Ondřej Šebek, Pavel M. Trávníček, Pierre Henri, Francesco Califano, Francesco Pegoraro, Matteo Faganello, Vyacheslav Olshevsky (+8 others)
2013 Journal of Space Weather and Space Climate  
Here we present our approach to take existing expertise in fluid and kinetic models to produce an integrated mathematical approach and software infrastructure that allows fluid and kinetic processes to  ...  The phenomena of space weather span a tremendous scale of densities and temperature with scales ranging 10 orders of magnitude in space and time.  ...  fluid-kinetic methods and fully kinetic methods.  ... 
doi:10.1051/swsc/2013027 fatcat:uwr45cwqpzg5xmgavgh43oqhsi

Similar physical simulation of microflow in micro-channel by centrifugal casting process

Ming-xing REN, Guo-tian WANG, Bang-sheng LI, Zhen-long WANG, Heng-zhi FU
2014 Transactions of Nonferrous Metals Society of China  
By means of similar physical simulation, liquid metal filling flow pattern in the microscale during the centrifugal casting process was studied.  ...  The total fluid energy remained constant during the mould filling, and the changes of cross-sectional area only occurred in the microflow channels with 0.3 mm in diameter.  ...  that of the simulation fluid.  ... 
doi:10.1016/s1003-6326(14)63167-8 fatcat:6k4h26d3rvf6tnkgs2ccur6i2i
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