SPH Supporting Animations - Revision history

Nick at 16:48, 9 October 2015

2015-10-09T16:48:47Z

Nick at 16:29, 9 October 2015

2015-10-09T16:29:30Z

Nick at 16:28, 9 October 2015

2015-10-09T16:28:35Z

Nick at 18:09, 30 September 2015

2015-09-30T18:09:56Z

Nick at 18:09, 30 September 2015

2015-09-30T18:09:22Z

Nick at 18:07, 30 September 2015

2015-09-30T18:07:28Z

Nick at 18:06, 30 September 2015

2015-09-30T18:06:08Z

Nick at 17:59, 30 September 2015

2015-09-30T17:59:54Z

Nick: Created page with "Content"

2015-09-30T17:57:48Z

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.
 ! {{#ev:youtube|rAUqGTGb57k}}
 |-
 |-
 ! style="width:500px" | 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.
 ! {{#ev:youtube|n7KEnqLg1NE}}
 |-
 |-
 ! style="width:500px" | 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.
 ! {{#ev:youtube|BiHVYMhOg-M}}
 |-

@@ Line 9: / Line 9: @@
 |-
 |-
-! 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 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.
 ! {{#ev:youtube|BiHVYMhOg-M}}
 |-

@@ Line 5: / Line 5: @@
 |-
 |-
-! 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 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.
 ! {{#ev:youtube|n7KEnqLg1NE}}
 |-

← Older revision		Revision as of 18:09, 30 September 2015
Line 16:		Line 16:

	'''[[Introductory SPH Iceberg-capsize Simulations]]'''		'''[[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.~~

@@ Line 13: / Line 13: @@
 |-
 |}
 {{#ev:youtube|B9TRacHKikE}}
 {{#ev:youtube|r6vm1F5vpmM}}

@@ Line 1: / Line 1: @@
 {| class="wikitable"
 |-
-! style="width:500px" | 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.
+! 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|CT239kMKBag}}
+! {{#ev:youtube|rAUqGTGb57k}}
 |-
 |-
@@ Line 10: / Line 26: @@
 |}
 {{#ev:youtube|B9TRacHKikE}}
 {{#ev:youtube|r6vm1F5vpmM}}
 [[SPH Supporting Animations|Supporting Animations]]

← Older revision		Revision as of 17:59, 30 September 2015
Line 1:		Line 1:
−	~~Content~~	+	{\| class="wikitable"
		+	\|-
		+	! style="width:500px" \| 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.
		+	! {{#ev:youtube\|CT239kMKBag}}
		+	\|-
		+	\|-
		+	! 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\|B9TRacHKikE}}
		+	{{#ev:youtube\|n7KEnqLg1NE}}
		+	{{#ev:youtube\|r6vm1F5vpmM}}
		+	{{#ev:youtube\|BiHVYMhOg-M}}
		+
		+	[[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.