NDLI: PittPack: Open-Source FFT-Based Poisson’s Equation Solver for Computing With Accelerators

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Volume 7: Fluids Engineering

Effect of Passive Green Wall Modules on Air Temperature and Humidity

An Experimental Setup to Characterize Boundary Layer Asymmetry on a Spinning Projectile Using Magnetic Resonance Velocimetry

Weep Hole and Interlayer Gap Flow Within Layered Pressure Vessels

Stereoscopic Particle Shadow Velocimetry

Settling Characteristics of Polymeric Additives in Dodecane

Large Eddy Simulation of Ventilated Pump-Turbine for Wastewater Treatment

A Reduced-Order Model for Predicting the Performance of a Liquid-Ring Vacuum Pump

The Investigation of the Kinetic Energy of Slug in a Horizontal Channel Using VOF Method

Analysis of Two-Phase Flow Slug Regime With Engineering Approach

An Accurate Unstructured Finite Volume Discrete Boltzmann Method

A Hyperbolicity Analysis of the 1991 OLGA’s Model for Isothermal Flow

Numerical Study of Two-Phase Flow in a Horizontal Pipeline Using an Unconditionally Hyperbolic Two-Fluid Model

Experimental Study of Chamber Volume Effect on Bubble Formation From Orifice Plates Submerged in Water

On the Aspects of a Convergent Shock Wave Impinging a Perturbed Density Interface

Parametric Study and Improvement of Phase Separation in Intermediate Headers of Microchannel Condensers

Mechanistic Modeling of Dynamic Zero-Net Liquid Holdup (ZNLH) in Gas-Liquid Cylindrical Cyclone (GLCC©) Separator

Using Experimental Fluid Dynamics and Computational Fluid Dynamics for Evaluating Periodic Mixing

Effect of Particle Parameters on Erosion Wear and Performance of Screw Centrifugal Pump

Characterizing Microfluidic Operations Underlying an Electrowetting Heat Pipe on the International Space Station

Dielectrophoretic Control of a Droplet at the Interface of Two Liquids in a Three Liquid System

PittPack: Open-Source FFT-Based Poisson’s Equation Solver for Computing With Accelerators

Front Dynamics in Miscible Displacement Flow in a Curved Pipe

Effect of Wind Speed on Ventilation Flow Through a Two Dimensional Room Fitted With a Windcatcher

Extracting Substantial Free Energy From Static Ambient Potential Energy Using Distance, Time-Lapse Chaos, and Coriolis Principles

A Central Difference Finite Volume Lattice Boltzmann Method for Simulation of 2D Inviscid Compressible Flows on Triangular Meshes

The Effect of Delta Winglet Inclination Angle on the Vortical Flow Downstream

Finite Element Models of One Dimensional Flows With Node-Dependent Accuracy

The Reynolds Stress in Turbulence From an Alternate Perspective

Characterization of Model-Based Uncertainties in Incompressible Turbulent Flows by Machine Learning

Numerical Investigation of Velocity Coefficient for Organic Turbine Nozzles Using MM As Working Fluid

Computational Investigation of Flow Over Geometry Compliant Lattice Structures

Force Decomposition of Medium Reynolds Number Oscillating Flow Over a Submerged Sphere

Analyzing the Shear Heating Effects in Modeling the Hydrodynamic Lubrication of High Torque Low Speed Diesel Engine by Considering Different Viscosity-Grade Lubricants

Rheological Characteristics of Surfactant-Based Fluids: A Comprehensive Study

Analysis of Melt Flows in an Electric Heating Furnace for Quartz Glass Synthesis

The Effect of Porous Support Layer in Forward Osmosis Membranes: A Computational Fluid Dynamics Simulation

Brownian Dynamics Simulations of Aggregation Phenomena in a Magnetic Particle Suspension With an Alternating Magnetic Field (Relationship Between the Aggregate Structure and the Heat Production)

Herschel-Bulkley Fluid Flow Characteristics in a Duct With an Obstacle

Viscoplastic Fluid Flow Between Parallel Plates With Triangular Obstacles

Study on the Numerical Analysis of In-Line Type Subsea Separator for Liquid-Liquid Mixture Flow

3D Modeling of the Thermal Phenomena During Laser Melting of Polymers

Numerical Modeling of Phan-Thien-Tanner Viscoelastic Fluid Flow Through a Square Cross-Section Duct: Heat Transfer Enhancement due to Shear-Thinning Effects

Resonance in Laminar Pipe Flow of Non-Linear Viscoelastic Fluids

Mixing Enhancement in a Novel Type of “Split and Recombine” Static Mixer

An Assessment of Health Hazards in Valves for Gaseous Oxygen Service: Sources and Preventive Measures

The Effect of PTFE Membrane Properties on Vacuum Membrane Distillation Module Performance

Pressure Fluctuation Mitigation in a Francis Turbine With Water Injection: Computational Study

Development of the Pneumatic Non-Contact Holder

Numerical Investigations of a Rotating Wire-Wrapped Cylinder

Analyzing the Flow in Annular Gap With a Restrictor Mounted on Outer Cylinder

Numerical Analysis on the Hydraulic Performance of the Auxiliary Impeller in Large Capacity Canned-Motor Pump

Experimental Characterization of Particle-Laden Air Flow Across Horizontal Pipe Junctions

Full Scale Testing of Pulse Jet Mixer Operating Control

Assessment of Different Turbulence Models on Simulations of Confined Jets in a Crossflow at Supercritical Pressure

Bench Scale Experimental Study of Slug Flow Phenomena Using PID Control

Pilot Scale Experimental Study of Slug Flow Phenomena Using PID Control

Modelling on Predicting Pressure Distribution and Capacity of Foil Thrust Bearing

Transition From Planar Stratified Flow in Converging Microchannels

Experimental Investigation on Newtonian Drop Formation in Different Continuous Phase Fluids

Combined Magnetohydrodynamic/Pressure Driven Flow of Multi-Layer Pseudoplastic Fluids Through a Parallel Flat Plates Microchannel

Experimental Study of the Suspension Flow Past Confined Low-Aspect-Ratio Cylinder Arranged Microchannels

Spray Performance of Alternative Jet Fuel Based Nanofuels at High-Ambient Conditions

Forced Wetting of Liquids Using Ultrasonic Surface Vibration

Degradation of Hydrophobic Surface Coatings Under Water Exposure

Preliminary Investigation of the Effect of Dielectrophoresis on Colloidal Transport and Deposition in Evaporating Droplets

Numerical Analysis of Heat Transfer and Fluid Flow in Micro-Welding Using CFD

Numerical Examination of Jets Induced by Multi-Bubble Interactions

Droplet Nucleation and Growth in Cryogenic Turboexpanders

Investigation of Three-Dimensional Lagrangian Coherent Structures in Flow Past Single and Arrays of Plate: Linear Energy Harvesting Applications

High Resolution Overset Structured Grid RANS Simulations of Flow Past a Surface Mounted Cube Using Eddy Viscosity Closure Models

Method to Reduce Drag Coefficient for Fuel Efficiency in Semi-Truck Trailer and Trailer Stability

Effect of Underbody Geometry on the Fuel Efficiency of Gasoline and Electric Vehicles

CFD Simulation of Multiphase Flow in Concentric Annuli

Optimization of Curved Spacer Prototype Design for Flow Improvement in Centrifugal Pump Impeller

Influence of Blade Shape Geometry on Very Low Specific Speed Centrifugal Pump Performance

Efficiency Variation on a 4-Stage Low Speed Research Compressor With a Redesigned Cantilevered Stator

Comparison of Experimental, Thermoelastohydrodynamic (TEHD) and Thermal, Non-Deforming Computational Fluid Dynamics (CFD) Results for Thrust Bearings: Part II

LES and Hybrid RANS-LES Simulation of a Pulsating Channel Flow

Transient Analysis of Air Flow in a Channel for Unconventional Radiator

On Fine Tuning the SST K–ω Turbulence Model Closure Coefficients for Improved Prediction of Automotive External Flows

Experimental Analysis of Air Flow in a Channel for Unconventional Radiator

Numerical Analysis of Breakwaters Turbulence Under Coastal Wave Actions

New Design Method for Spiral Casings Considering the Properties of the Impeller and Spiral Casing at Design and Off-Design Conditions and Numerical Verification With CFD

The Impact of the Gas Temperature and of the Relative Humidity on the Performance of Fans Operating in Drying Plants

Aerodynamic Shape Optimization of Diffuser Augmented Wind Turbine Shrouds Using Asynchronous Differential Evolution

The Impact of the Wind Power Plant on the Air Radars Functioning

Genetic Algorithm-Based Design of Airfoil for the Root Region of Small Wind Turbines and Performance Analysis With Gurney Flaps

Numerical Simulation on Aerodynamic Performance of Ram Air Turbine Based on Mixed Flow Field

Downwind Two-Bladed Wind Turbine Aerodynamic Performance Evaluation Implementing Actuator Line Model

The Effect of a Spanwise Body Force on Skin-Friction Reduction and its Connections to Low-Drag States in Turbulent Flow

Pulsatory Mixing of Laminar Flow Using Bubble-Driven Micro-Pumps

The Impact of Adding a Labyrinth Surface to an Optimal Helical Seal Design

Comparing Fish-Inspired Ram Filters for Collection of Harmful Algae

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PittPack: Open-Source FFT-Based Poisson’s Equation Solver for Computing With Accelerators

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jaber, J. Hasbestan Senocak, Inanc
Copyright Year	2018
Abstract	Many environmental flows are simulated in a Cartesian domain using buoyancy-driven incompressible Navier-Stokes equations. A significant cost of the simulation is devoted to the solution of the elliptic pressure equation to enforce the conservation of mass principle. The legacy software, FISHPACK, has been used for this purpose for many years. We present a new software package for the direct solution of the pressure Poisson’s equation on a directionally uniform Cartesian mesh with a second-order accurate finite-difference formulation. We use the separation of variables principle and adopt fast Fourier transforms (FFT) to convert the system to a group of independent tridiagonal systems that can be solved directly. The computational complexity of the present methodology is proportional to N2 (O(NlogN)). However, each stage of the solution algorithm can be performed simultaneously leading to a pleasingly parallel problem that is well suited for massively-threaded accelerators, such as modern graphics processing units (GPU). Theoretically speaking, if an accelerator can sustain N2 resident threads, the computational complexity will drop to O(NlogN). We use OpenACC directives with cuFFT library on a GPU to realize substantial acceleration of the overall solution algorithm and compare its performance relative to an implementation that used the FFTW library on central processing units (CPU). For a problem with 5123 points, the GPU version is about 17 × faster than the CPU version.
File Format	PDF
ISBN	9780791852101
DOI	10.1115/IMECE2018-87697
Volume Number	Volume 7: Fluids Engineering
Conference Proceedings	ASME 2018 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2018-11-09
Publisher Place	Pittsburgh, Pennsylvania, USA
Access Restriction	Subscribed
Subject Keyword	Navier-stokes equations Computer software Graphics processing units Buoyancy Screw threads Poisson equation Separation (technology) Pressure Flow (dynamics) Thread Algorithms Simulation Fast fourier transforms
Content Type	Text
Resource Type	Article

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