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A Dimension-reduced Pressure Solver for Liquid Simulations

Ryoichi Ando, Nils Thürey, Chris Wojtan
2015 Computer graphics forum (Print)  
Abstract This work presents a method for efficiently simplifying the pressure projection step in a liquid simulation.  ...  We first devise a straightforward dimension reduction technique that dramatically reduces the cost of solving the pressure projection.  ...  Additionally, we also wish to thank Reiji Tsuruno for providing us with computational resources, and Florian Ferstl for the helpful discussions regarding multigrid solvers.  ... 
doi:10.1111/cgf.12576 fatcat:chkeby24vzg4tnybkfoyz6i5p4

Bubble simulations with an interface tracking technique based on a partitioned fluid–structure interaction algorithm

J. Degroote, P. Bruggeman, R. Haelterman, J. Vierendeels
2010 Journal of Computational and Applied Mathematics  
During the iterations, a reduced-order model of the flow solver is generated from the inputs and outputs of the solver.  ...  The gas-liquid interface is conceived as a zero-mass, zero-thickness structure whose position is determined by the liquid forces, a uniform gas pressure and surface tension.  ...  The dimension of the matrix is 2N , which is small in comparison with the number of cells in the liquid domain, and thus a direct solver is used.  ... 
doi:10.1016/ fatcat:nllrbi3e6rh25ik3fcdrckrydu

A coupling algorithm for partitioned solvers applied to bubble and droplet dynamics

Joris Degroote, Peter Bruggeman, Jan Vierendeels
2009 Computers & Fluids  
The structural solver uses a reduced order model of the flow solver to obtain implicit coupling between both solvers.  ...  Given a displacement of the interface, a separate flow solver calculates the flow on the liquid side of the interface with the Arbitrary Lagrangian Eulerian (ALE) technique.  ...  between distributions of the pressure on the liquid side of the interface coming from the reduced order model and distributions from the flow solver, a hat is used for those from the reduced order model  ... 
doi:10.1016/j.compfluid.2008.06.004 fatcat:24yu72fyfzbblaoh242zdmbt3y

Variational stokes

Egor Larionov, Christopher Batty, Robert Bridson
2017 ACM Transactions on Graphics  
Modern fluid simulators treat viscosity and pressure in separate solver stages, which reduces accuracy and yields incorrect free surface behavior.  ...  We propose a novel unsteady Stokes solver for coupled viscous and pressure forces in grid-based liquid animation which yields greater accuracy and visual realism than previously achieved.  ...  Thanks to Ryan Goldade for helpful feedback and discussions as well as computing environment support, and to John Lynch for guidance on Houdini FLIP simulations and scenario setup.  ... 
doi:10.1145/3072959.3073628 fatcat:74cno5parvgq5avatc5rvglsda

A Pressure-based Compressible-Liquid Flow Model for Computation of Instantaneous Valve Closure in Pipes

R. Jishnu Chandran, Department of Aerospace Engineering, Indian Institute of Space Science and Technology, Thiruvananthapuram–695547, Kerala, India, A. Salih
2019 Science & Technology Journal  
The proposed model could successfully capture the entire physics of the problem, including the compressible modeling of the liquid involved and could produce high accuracy numerical results.  ...  ACKNOWLEDGMENT The authors are thankful to the Department of Aerospace Engineering, Indian Institute of Space Science and Technology for extending the support and encouragement in completing this study  ...  extended to solve a large CONCLUSIONS is proposed for the simulation of isothermal lowincorporates a liquid equation of state into a pressure-based incompressible solver algorithm.  ... 
doi:10.22232/stj.2019.07.02.07 fatcat:cdejrckkqve47o7z3cepqxlvwe

Hybrid Simulation Approach on MEMS Piezoresistive Microcantilever Sensor for Biosensing Applications

Rosminazuin A. Rahim, Badariah Bais, Burhanuddin Yeop Majlis
2009 Advanced Materials Research  
The simulation results were later integrated with system-level simulation solver called Architect to enable the optimization of the sensor circuit output.  ...  This paper uses a hybrid simulation approach in CoventorWare design environment which combines finite element analysis and circuit simulation modeling to obtain the optimal performance of piezoresistive  ...  System-level simulation technique from Architect solver offers alternate approach for MEMS analysis.  ... 
doi:10.4028/ fatcat:2vd5ypgv5bbvrdtb2yamnp7jgq

A ghost fluid, level set methodology for simulating multiphase electrohydrodynamic flows with application to liquid fuel injection

B.P. Van Poppel, O. Desjardins, J.W. Daily
2010 Journal of Computational Physics  
The method is then applied to simulate a charged liquid kerosene jet. Published by Elsevier Inc.  ...  In this paper, we present the development of a sharp numerical scheme for multiphase electrohydrodynamic (EHD) flows for a high electric Reynolds number regime.  ...  Computational resources have been provided by NSF in the form of a Teragrid TRAC allocation for high-performance computing. The authors are thankful to Dr. John S.  ... 
doi:10.1016/ fatcat:qfpwrj7hl5akxaj3rlw5yenmoa

Numerical simulation of wave impact on a rigid wall using a two--phase compressible SPH method [article]

Ashkan Rafiee, Denys Dutykh
2013 arXiv   pre-print
The two-phase SPH solver is then used to model a benchmark problem of liquid impact on a rigid wall. The results are compared with an incompressible Level Set solver.  ...  Furthermore, a wave impact on a rigid wall with a large entrained air pocket is modelled. The SPH simulation is initialised by the output of a fully non-linear potential flow solver.  ...  The authors would like to thank the Irish Centre for High-End Computing (ICHEC) for the provision of computational facilities and support.  ... 
arXiv:1306.0769v1 fatcat:o2ip77x7onaxpb4wra56zhifx4

Constraint Bubbles: Adding Efficient Zero-Density Bubbles to Incompressible Free Surface Flow [article]

Ryan Goldade, Christopher Batty
2017 arXiv   pre-print
Liquid simulations for computer animation often avoid simulating the air phase to reduce computational costs and ensure good conditioning of the linear systems required to enforce incompressibility.  ...  Implementation of the method requires only minor modifications to the pressure solve of a standard grid-based fluid solver, and yields linear systems that remain sparse and symmetric positive definite.  ...  Liquid simulations for computer animation o en avoid simulating the air phase to reduce computational costs and ensure good conditioning of the linear systems required to enforce incompressibility.  ... 
arXiv:1711.11470v1 fatcat:yv7rnjzzafgallo673x3z6ytfq

Lng Release in Storage Area: Multiphase Modelling and CFD Simulation for Consequences Analysis in Risk Assessment

Katia Cassano, Alessio Pierro, Raffaella Perini, Paolo Farinelli
2022 Chemical Engineering Transactions  
In particular, a multi-phase and multi-component incompressible solver based on a Volume Of Fluid (VOF) method is implemented.  ...  When LNG is released, a liquid pool with very low temperature (around -160°C) is formed and instantly evaporation of this liquid starts.  ...  However, during the spill, temperature difference between liquid and ground come down, leading to a reduced rate of vaporization.  ... 
doi:10.3303/cet2291030 doaj:3098e6f4dee64742b556604657711272 fatcat:fgga7dc5zjaubpuzgiw4mklwue

Ultrasonic liquid metal processing: The essential role of cavitation bubbles in controlling acoustic streaming

G.S. Bruno Lebon, Iakovos Tzanakis, Koulis Pericleous, Dmitry Eskin, Patrick S. Grant
2019 Ultrasonics sonochemistry  
This has implications for the technological use of ultrasound in liquid metal processing.  ...  A B S T R A C T The acoustic streaming behaviour below an ultrasonic sonotrode in water was predicted by numerical simulation and validated by experimental studies.  ...  Table 2 lists the discretization schemes and solver control parameters for the simulations. A summary of the solver algorithm is detailed below: 1.  ... 
doi:10.1016/j.ultsonch.2019.01.021 fatcat:yryhhkurfjczrgsj4qc4qkjhlu

Latent-space Physics: Towards Learning the Temporal Evolution of Fluid Flow [article]

Steffen Wiewel, Moritz Becher, Nils Thuerey
2019 arXiv   pre-print
We highlight the capabilities of our method with a series of complex liquid simulations, and with a set of single-phase buoyancy simulations.  ...  With a set of trained networks, our method is more than two orders of magnitudes faster than a traditional pressure solver.  ...  Reducing Dimensionality In order to reduce the spatial dimensionality of our inference problem, we employ a fully convolutional autoencoder architecture [MMCS11] .  ... 
arXiv:1802.10123v3 fatcat:m6jbm5xzrbci3ehkb3vxm7j2rq

Mesh Sensitivity Study of Soil Barrier Subjected to Blast Loading: Numerical Methods Using AUTODYN 3D

Jestin J, Faisal Ali, Ahmad Mujahid Ahmad Zaidi, Md Fuad Shah Koslan, Mohd Zaid Othman
2014 Modern Applied Science  
The pressure results on barrier surface obtained through one third scale are able to produce results that are in good agreement with published experimental test data as compared to full scale simulation  ...  In this study, a numerical tool i.e AUTODYN 3D is used to determine the optimum element size for the soil barrier subjected to air blast load.  ...  Acknowledgements The authors appreciate the financial support for the work from the Ministry of Higher Education of Malaysia under ERGS grant no. ERGS/1/2012/PK04/UPNM/01/2.  ... 
doi:10.5539/mas.v8n6p250 fatcat:l3ut2h6ztvgotkoegbccorxkxi

2D and 3D numerical modelling of internal flow of Pressure-swirl atomizer

Milan Maly, Jaroslav Slama, Marcel Sapik, Jan Jedelsky, P. Dančová, J. Novosad
2019 EPJ Web of Conferences  
This paper compares 2D axisymmetric and 3D numerical models used to predict the internal flow of a pressure-swirl atomizer using a commercial software Ansys Fluent 18.1.  ...  However, it overpredicted the velocity of the discharged liquid sheet. The LES model performed similarly to the laminar solver, but the liquid sheet velocity was 10% lower.  ...  The scaled atomizer was operated at the same Re p thus the inlet pressure had to be reduced to 10 kPa. The Fr for original atomizer was 293 but it decreased to 9.3 for the scaled atomizer.  ... 
doi:10.1051/epjconf/201921302055 fatcat:evicugzdwvhsfhccozycpxx7xm

A stream function solver for liquid simulations

Ryoichi Ando, Nils Thuerey, Chris Wojtan
2015 ACM Transactions on Graphics  
Abstract This paper presents a liquid simulation technique that enforces the incompressibility condition using a stream function solve instead of a pressure projection.  ...  Figure 1 : Liquid streaming out of a closed container with holes. Our solver calculates the complex formation of bubbles without explicitly solving for the gas phase.  ...  Acknowledgements The first author was supported by a JSPS Postdoctoral Fellowship for Research Abroad.  ... 
doi:10.1145/2766935 fatcat:xy36rdwobfc27hewghx73rhdsa
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