Introductory SPH Iceberg-capsize Simulations - Revision history

Nick at 16:31, 9 October 2015

2015-10-09T16:31:05Z

Nick at 16:30, 9 October 2015

2015-10-09T16:30:24Z

Nick at 18:14, 30 September 2015

2015-09-30T18:14:55Z

Nick at 18:12, 30 September 2015

2015-09-30T18:12:59Z

Nick at 18:09, 30 September 2015

2015-09-30T18:09:35Z

Nick: Created page with "content"

2015-09-30T18:08:12Z

Created page with "content"

New page

content

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 |-
 |-
-! style="width:500px" | In this model a fluid is initially held in a block configuration. At the first time step the fluid is allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular block and interacts with the boundary walls. The color of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
+! style="width:500px" | In this view the motion of the particles at the boundary of the model iceberg are shown. The color of each solid particle corresponds to its acceleration magnitude (m/s^2) at each time step.
 ! {{#ev:youtube|B9TRacHKikE}}
 |-
 |}

@@ Line 1: / Line 1: @@
 {| class="wikitable"
 |-
-! style="width:500px" | In this model a fluid is initially held in a block configuration. At the first time step the fluid is allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular block and interacts with the boundary walls. The color of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
+! style="width:500px" | In this model an oscillation piston creates waves within a 250 cm x 50 cm x 50 cm tank. A solid block of 900 kg/m^3 density floats on one side of the tank and capsizes under the influence of the standing waves.The color of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
 ! {{#ev:youtube|r6vm1F5vpmM}}
 |-

← Older revision		Revision as of 18:14, 30 September 2015
Line 9:		Line 9:
	\|-		\|-
	\|}		\|}
−
−
−	~~[[SPH Supporting Animations\|Supporting Animations]]~~
−
−	~~Animations from SPH on front page Periodic Boundary Conditions~~
−
−	~~Click on video and takes to Smoothed Particle Hydrodynamics page~~
−
−	~~Link from Current Research section> Smoothed Particle Hydrodynamics~~
−
−	~~Periodic Boundary Condition Simulations~~
−
−	~~In this model a fluid is initially held in a square configuration along a sloped ramp with~~
−
−	~~open boundaries on both sides. At the the first time step the fluid is allow to flow outward due to~~
−
−	~~the force of gravity and begins to flow down the ramp. Once the fluid particles meet the boundary~~
−
−	~~edge on the right they cross over to the left side of the ramp. During the first few time steps the~~
−
−	~~fluid quickly moves to fill the void on the upper left hand side and crashes with slower moving~~
−
−	~~particles creating a significant splashing effect and the formation of a standing wave. Throughout~~
−
−	~~the simulation this standing wave begins to die out as the flow approaches a state of equilibrium.~~
−
−	~~Title: Exploring the method of smoothed particle hydrodynamics (SPH) and its application to~~
−
−	~~icebergcapsize dynamics~~
−
−	~~Lynn Kaluzienski, 9/20/2015, University of Maine~~
−
−	~~Analytical solutions for problems in fluid dynamics are unavailable for most real world~~
−
−	~~flows. The method of Smoothed Particle Hydrodynamics (SPH) was initially developed for~~
−
−	~~astrophysical problems and has since been used to formulate approximate solutions for equations~~
−
−	~~in fluid dynamics, chiefly the Navier Stokes solution for a weakly compressible fluid. SPH takes~~
−
−	~~the innovative approach of replacing a fluid with an array of particles and solving the Navier~~
−
−	~~Stokes equation on a particle by particle basis. A smoothing function is applied to each individual~~
−
−	~~particle to determine the influence of its neighbors within a certain radius giving more weight to~~
−
−	~~nearby particles. SPH is naturally a meshfree Lagrangian method, providing several benefits over~~
−
−	~~former gridbased techniques in capturing surface accelerations and removing the need of tracking~~
−
−	~~fluid boundaries. One difficulty with the SPH method is the need for a large quantity of particles to~~
−
−	~~achieve the same precision as a gridbased approach. However, recent improvements in~~
−
−	~~computational power such as the widespread use of graphic processing units (GPUs) have made~~
−
−	~~SPH implementation feasible and computationally inexpensive. Several open source codes, such as~~
−
−	~~DualSPHysics, make high resolution SPH simulations easily achievable on computers with~~
−
−	~~multiple GPU processing units. Depending on complexity, several hundred thousand particle~~
−
−	~~simulations can be achieved on the order of minutes to hours on a desktop computer. Largerscale~~
−
−	~~models with millions to even billions of particles can be efficiently computed on supercomputers.~~
−
−	~~The University of Maine SECS Numerical Laboratory currently has SPH simulations running on~~
−
−	~~multiple GPUs. In addition, our collaboration with the Advanced Computing Group at Umaine will~~
−
−	~~allow us to run increasingly complex and higher resolution simulations on one of their~~
−
−	~~supercomputers in the near future.~~
−
−	~~Supporting Literature: Crespo et al 2015, Monaghan 2012~~
−
−	~~Link> Supporting Animations~~
−
−	~~Each of these representations was exported from Paraview, a powerful visualization tool that stores~~
−
−	~~all output parameters (pressure, density, velocity, acceleration, vorticity, ID number) for each~~
−
−	~~particle at every time step.~~
−
−	~~Dambreak Simulation~~
−
−	~~In this model a fluid is initially held in a block configuration. At the first time step the fluid is~~
−
−	~~allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular~~
−
−	~~block and interacts with the boundary walls. The color of each fluid particle corresponds to its~~
−
−	~~velocity magnitude (m/s) at each time step.~~
−
−	~~Initial Velocity Simulation~~
−
−	~~In this model two fluids with spherical and square configurations are given initial velocities. As~~
−
−	~~they collide with the square surface in the center they interact within a boxed boundary. The color~~
−
−	~~of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.~~
−
−	~~WaveMaker Simulation~~
−
−	~~In this model an oscillating piston creates wave within a fluid. The color of each fluid particle~~
−
−	~~corresponds to its ID number, thereby illustrating the effect of mixing throughout the simulation.~~
−
−	~~Link> Introductory SPH Icebergcapsize Simulations~~
−
−	~~Wave Tank Experiment Simulation~~
−
−	~~In this model an oscillation piston creates waves within a 250 cm x 50 cm x 50 cm tank. A solid~~
−
−	~~block of 900 kg/m^3 density floats on one side of the tank and capsizes under the influence of the~~
−
−	~~standing waves.The color of each fluid particle corresponds to its velocity magnitude (m/s) at each~~
−
−	~~time step.~~
−
−	~~Iceberg Closeup~~
−
−	~~In this view the motion of the particles at the boundary of the model iceberg are shown. The color~~
−
−	~~of each solid particle corresponds to its acceleration magnitude (m/s^2) at each time step.~~

@@ Line 2: / Line 2: @@
 |-
 ! style="width:500px" | In this model a fluid is initially held in a block configuration. At the first time step the fluid is allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular block and interacts with the boundary walls. The color of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
-! {{#ev:youtube|rAUqGTGb57k}}
+! {{#ev:youtube|r6vm1F5vpmM}}
 |-
 |-
 ! style="width:500px" | In this model a fluid is initially held in a block configuration. At the first time step the fluid is allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular block and interacts with the boundary walls. The color of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
-! {{#ev:youtube|n7KEnqLg1NE}}
+! {{#ev:youtube|B9TRacHKikE}}
 |-
 |}
 [[SPH Supporting Animations|Supporting Animations]]

← Older revision		Revision as of 18:09, 30 September 2015
Line 1:		Line 1:
−	~~content~~	+	{\| class="wikitable"
		+	\|-
		+	! style="width:500px" \| In this model a fluid is initially held in a block configuration. At the first time step the fluid is allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular block and interacts with the boundary walls. The color of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
		+	! {{#ev:youtube\|rAUqGTGb57k}}
		+	\|-
		+	\|-
		+	! style="width:500px" \| In this model a fluid is initially held in a block configuration. At the first time step the fluid is allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular block and interacts with the boundary walls. The color of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
		+	! {{#ev:youtube\|n7KEnqLg1NE}}
		+	\|-
		+	\|-
		+	! style="width:500px" \| In this model a fluid is initially held in a block configuration. At the first time step the fluid is allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular block and interacts with the boundary walls. The color of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
		+	! {{#ev:youtube\|BiHVYMhOg-M}}
		+	\|-
		+	\|}
		+
		+
		+	'''[[Introductory SPH Iceberg-capsize Simulations]]'''
		+
		+	{{#ev:youtube\|B9TRacHKikE}}
		+	{{#ev:youtube\|r6vm1F5vpmM}}
		+
		+	[[SPH Supporting Animations\|Supporting Animations]]
		+
		+	Animations from SPH on front page Periodic Boundary Conditions
		+
		+	Click on video and takes to Smoothed Particle Hydrodynamics page
		+
		+	Link from Current Research section> Smoothed Particle Hydrodynamics
		+
		+	Periodic Boundary Condition Simulations
		+
		+	In this model a fluid is initially held in a square configuration along a sloped ramp with
		+
		+	open boundaries on both sides. At the the first time step the fluid is allow to flow outward due to
		+
		+	the force of gravity and begins to flow down the ramp. Once the fluid particles meet the boundary
		+
		+	edge on the right they cross over to the left side of the ramp. During the first few time steps the
		+
		+	fluid quickly moves to fill the void on the upper left hand side and crashes with slower moving
		+
		+	particles creating a significant splashing effect and the formation of a standing wave. Throughout
		+
		+	the simulation this standing wave begins to die out as the flow approaches a state of equilibrium.
		+
		+	Title: Exploring the method of smoothed particle hydrodynamics (SPH) and its application to
		+
		+	icebergcapsize dynamics
		+
		+	Lynn Kaluzienski, 9/20/2015, University of Maine
		+
		+	Analytical solutions for problems in fluid dynamics are unavailable for most real world
		+
		+	flows. The method of Smoothed Particle Hydrodynamics (SPH) was initially developed for
		+
		+	astrophysical problems and has since been used to formulate approximate solutions for equations
		+
		+	in fluid dynamics, chiefly the Navier Stokes solution for a weakly compressible fluid. SPH takes
		+
		+	the innovative approach of replacing a fluid with an array of particles and solving the Navier
		+
		+	Stokes equation on a particle by particle basis. A smoothing function is applied to each individual
		+
		+	particle to determine the influence of its neighbors within a certain radius giving more weight to
		+
		+	nearby particles. SPH is naturally a meshfree Lagrangian method, providing several benefits over
		+
		+	former gridbased techniques in capturing surface accelerations and removing the need of tracking
		+
		+	fluid boundaries. One difficulty with the SPH method is the need for a large quantity of particles to
		+
		+	achieve the same precision as a gridbased approach. However, recent improvements in
		+
		+	computational power such as the widespread use of graphic processing units (GPUs) have made
		+
		+	SPH implementation feasible and computationally inexpensive. Several open source codes, such as
		+
		+	DualSPHysics, make high resolution SPH simulations easily achievable on computers with
		+
		+	multiple GPU processing units. Depending on complexity, several hundred thousand particle
		+
		+	simulations can be achieved on the order of minutes to hours on a desktop computer. Largerscale
		+
		+	models with millions to even billions of particles can be efficiently computed on supercomputers.
		+
		+	The University of Maine SECS Numerical Laboratory currently has SPH simulations running on
		+
		+	multiple GPUs. In addition, our collaboration with the Advanced Computing Group at Umaine will
		+
		+	allow us to run increasingly complex and higher resolution simulations on one of their
		+
		+	supercomputers in the near future.
		+
		+	Supporting Literature: Crespo et al 2015, Monaghan 2012
		+
		+	Link> Supporting Animations
		+
		+	Each of these representations was exported from Paraview, a powerful visualization tool that stores
		+
		+	all output parameters (pressure, density, velocity, acceleration, vorticity, ID number) for each
		+
		+	particle at every time step.
		+
		+	Dambreak Simulation
		+
		+	In this model a fluid is initially held in a block configuration. At the first time step the fluid is
		+
		+	allowed to flow out due to the force of gravity. As if flows outward it crashes into a rectangular
		+
		+	block and interacts with the boundary walls. The color of each fluid particle corresponds to its
		+
		+	velocity magnitude (m/s) at each time step.
		+
		+	Initial Velocity Simulation
		+
		+	In this model two fluids with spherical and square configurations are given initial velocities. As
		+
		+	they collide with the square surface in the center they interact within a boxed boundary. The color
		+
		+	of each fluid particle corresponds to its velocity magnitude (m/s) at each time step.
		+
		+	WaveMaker Simulation
		+
		+	In this model an oscillating piston creates wave within a fluid. The color of each fluid particle
		+
		+	corresponds to its ID number, thereby illustrating the effect of mixing throughout the simulation.
		+
		+	Link> Introductory SPH Icebergcapsize Simulations
		+
		+	Wave Tank Experiment Simulation
		+
		+	In this model an oscillation piston creates waves within a 250 cm x 50 cm x 50 cm tank. A solid
		+
		+	block of 900 kg/m^3 density floats on one side of the tank and capsizes under the influence of the
		+
		+	standing waves.The color of each fluid particle corresponds to its velocity magnitude (m/s) at each
		+
		+	time step.
		+
		+	Iceberg Closeup
		+
		+	In this view the motion of the particles at the boundary of the model iceberg are shown. The color
		+
		+	of each solid particle corresponds to its acceleration magnitude (m/s^2) at each time step.

Introductory SPH Iceberg­-capsize Simulations - Revision history

Nick at 16:31, 9 October 2015

Nick at 16:30, 9 October 2015

Nick at 18:14, 30 September 2015

Nick at 18:12, 30 September 2015

Nick at 18:09, 30 September 2015

Nick: Created page with "content"

Introductory SPH Iceberg-capsize Simulations - Revision history