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Topic: Streakline

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	NationMaster - Encyclopedia: Streakline
		A streakline, on the other hand, would begin at some starting position (in space and time) and would vary from a streamline when the next delta-t (and accompanying vector field) was known, then again at the next delta-t, etc.
		Interactive streakline visualization is quite useful to examine the details of these complex flow fields.
		A streakline, on the other hand, would begin at some starting position (in space & time) and would vary from a streamline when the next delta-t (and accompanying vector field) was known, then again at the next delta-t, etc.
	www.nationmaster.com /encyclopedia/Streakline (281 words)

	Contours - Issue 35 - Tecplot Blog: Scott Imlay
		An everyday example of a streakline is a thin stream of smoke being released from a chimney.
		As a final point to clarify the relationship between streaklines and particle paths - note that the leading particle of the blue streakline is actually moving along the green particle path.
		This is because each point on the streakline is a particle released at a different time with the leading particle released at the starting time.
	www.tecplot.com /showcase/contours/issue_35/article04.htm (645 words)

	streakline
		Streamlines are considered to be independent of time; streaklines represent time-dependent vector fields.
		A streakline, on the other hand, would begin at some starting position (in space & time) and would vary from a streamline when the next delta-t (and accompanying vector field) was known, then again at the next delta-t, etc.
		Streakline flow visualization of discrete-hole film cooling with normal, slanted and compound angle injection (NASA technical note ; NASA TN D-8248)
	www.abacci.com /wikipedia/topic.aspx?cur_title=streakline (153 words)

	Flow Visualization Techniques
		Below is the pseudo-code for computing streaklines in the most general situation, namely where both vectors and grid positions for the field may be changing over time (derived from Lane, 1994).
		Streaklines are often represented as a continuous stream of particles emanating from a discrete set of points and flowing through the field.
		What this means is that if we use each particle along a streamline or streakline to influence a spherical segment of the field, locations under the influence of multiple particles will have continuous, smooth transitions from one particle to the other.
	web.cs.wpi.edu /~matt/courses/cs563/talks/flowvis/flowvis.html (978 words)

	ME6601 Module Five - Introduction to Fluid Mechanics
		A particular type of fluid-material line which is of much utility is the streakline, which is the locus of all particles which have passed a specified ("tagging") location in some interval of time.
		The use of dye, smoke or hydrogen bubbles to generate streaklines is common in practice.
		This is the equation of the streakline at this time.
	www.catea.org /grade/mecheng/mod5/mod5.html (1196 words)

	[No title]
		Slide 4 — Streaklines - Solving a Streakline Problem Now, as you have already noticed (noted in our previous module) in the case of our steady flow, streaklines generated by stationary taggers, streamlines, and pathlines are all identical to one another.
		The streakline evolves over time, moving the tagger, the streakline is changing at any instant because the flow is coming down from the top, and snaring out to the sides.
		And by the way, the left-hand end of the streakline, because of the magnitude of the flow, is now located at minus one hundred and sixty three point eight, so way off to the left-hand side, because I have only got to minus five here.
	www.catea.org /grade/mecheng/Text/Module5.doc (2462 words)

	User's Reference - Streakline
		The streakline points are computed iteratively, and the spacing between the points depends on the element size of the connections.
		These steps are determined by interpolating vectors from the prior and subsequent vector fields at the geometric position of the current end of the streakline, and then linearly interpolating between the results to produce a vector for the current position and time.
		Associated with the streakline is a "time" component that indicates, for each position of the streakline, the time at which the particle reached that position.
	www.bu.edu /cism/cismdx/ref/dx.Html/pages/refgu148.htm (1267 words)

	User's Reference - Streakline
		The streakline points are computed iteratively, and the spacing between the points depends on the element size of the connections.
		These steps are determined by interpolating vectors from the prior and subsequent vector fields at the geometric position of the current end of the streakline, and then linearly interpolating between the results to produce a vector for the current position and time.
		Associated with the streakline is a "time" component that indicates, for each position of the streakline, the time at which the particle reached that position.
	web.mit.edu /opendx_v4.4/distrib/i386_rhel4/html/pages/refgu148.htm (1267 words)

	Streaklines around a square prism (Site not responding. Last check: )
		In the above sequence of streaklines for a flow around a square prism, 8 frames of streaklines are presented at 8 instants in a complete cycle of the lift force.
		For every frame, the corresponding lift force is drawn on its upper left-hand side panel, in which the fl dot represents the instantaneous lift force value induced by the flow field corresponding to the streamlines shown.
		In Frame 1, the total lift force on the square is zero, and three vortices are indicated by A, B and C behind the square.
	www.ams.sunysb.edu /~dyu/album/node1.html (293 words)

	physics - Streamline
		In fluid dynamics, a streamline is a line which is everywhere tangent to the velocity of the flow.
		This can be contrasted with a pathline, which is the trajectory that an imaginary infinitesimal particle would make if it followed the flow of a fluid in which it was embedded, and a streakline, which is the current location of all fluid particles that have passed through a particular spatial point in the past.
		Engineers often use dyes in water or smoke in air in order to see streaklines, and then use the patterns to guide their design modifications, aiming to reduce the drag.
	www.physicsdaily.com /physics/Streamline (437 words)

	Streakline around rectangular prisms (Site not responding. Last check: )
		These are streaklines of flow around rectangular prisms with different aspect ratios.
		The streaklines reveal that the 2:3 rectangular prism, similar to a square, does not exhibit reattachment.
		These flow features are also reflected in the integral forces on the prism (the drag and lift) as well as the distributions of the pressure coefficient along the surface.
	www.ams.sunysb.edu /~dyu/album/node2.html (76 words)

	2001_May_a1
		A streakline is the locus of all fluid particles that have passed through a prescribed fixed point during a specific interval of time.
		An example of a streakline is a line traced by the continuous injection at a certain point of dye, smoke, or bubbles.
		A pathline is the curve traversed by a particular fluid particle during a specified time interval, such as that produced by time-exposure photography of a tracer particle moving in a flow.
	www.electronics-cooling.com /articles/2001/2001_may_a1.php (3309 words)

	Contours - Issue 04
		Streaklines represent the curve that evolves by continuously injecting massless particles into the flow field from a specific location.
		Streaklines are similar to the experimental technique of releasing a tracer substance such as smoke or oil drops into the flow field.
		CFD Analyzer produces streaklines by releasing a sequence of particles from the release point(s) and integrating the unsteady velocity field to find their positions in the flow at the final solution time.
	www.tecplot.com /showcase/contours/issue_04/article04.htm (1198 words)

	Scientific Computing & Visualization \| Visualization \| Visualization Gallery \| Inducer/Streakline
		The streakline demo allows a user to pick points anywhere within the simulation domain and see the resulting streaklines.
		These points are sent to the streakline generation program, which integrates them over a sequence of time steps.
		It is important to predict the unsteady flow as accurately as possible, since it can cause vibration of structural components upstream of the inducer, lowering their life cycles.
	scv.bu.edu /visualization/gallery/inducer/index.html (534 words)

	Continuity Equation
		It is possible for pathlines to cross, as you can imagine from the freeway analogy: as a car changes lanes, the pathline traced out by its lights might cross another pathline traced out by an adjoining vehicle at a different time.
		A streakline is the line traced out by all the particles that passed through a particular point at some earlier time.
		In unsteady flow, streamlines, pathlines and streaklines are all different, but in steady flow, streamlines, pathlines and streaklines are identical.
	www.princeton.edu /~asmits/Bicycle_web/continuity.html (523 words)

	[No title]
		Each invocation of the Streakline module in the same graph receives a unique name, which is constructed from the #!F-adobe-times-bold-r-normal--18* name #!EF, #!F-adobe-times-bold-r-normal--18* start #!EF, #!F-adobe-times-bold-r-normal--18* time #!EF, #!F-adobe-times-bold-r-normal--18* head #!EF, #!F-adobe-times-bold-r-normal--18* curl #!EF, and #!F-adobe-times-bold-r-normal--18* flag #!EF arguments.
		Thus, if more than one invocation of Streakline in the same graph uses the same arguments, varying only the vector field, a unique #!F-adobe-times-bold-r-normal--18* name #!EF string must be assigned to each.
		#!N #!N The individual time-step vector fields are passed to Streakline as #!F-adobe-times-bold-r-normal--18* data #!EF, either combined in a single series object or one at a time in successive executions of the graph containing the Streakline module, as fields.
	lasp.colorado.edu /cism/CISM_DX/code/CISM_DX-0.50/required_packages/dx/dx/help/dxall954 (1546 words)

	FEUP -
		Both geometries are relatively simple, but the resulting flow patterns are complex due to the 3D nature of the flow and to the nonlinear rheological behavior of the viscoelastic fluids.
		Experimental techniques will be used to characterize the hydrodynamics, such as LDA (laser Doppler Anemometry), streakline photography techniques and pressure drop measurements.
		The significance for the field of computational rheology is twofold: (i) the ability to simulate realistic 3D melt flow processes such as extrusion; (ii) a better understanding of problematic high-stress regions at separation points, including the setting of appropriate boundary conditions for practical applications, which will lead to improved process design.
	www.fe.up.pt /si_uk/projectos_geral.mostra_projecto?P_ID=954 (808 words)

	PowerPoint-Präsentation
		- is a natural number the streakline is closed
		- is a rational number the streakline is flosed after
		- is a real number the streakline is surface filling
	gershwin.ens.fr /geomix/Lectures/Joerg_Schmalzl/html/Lecture-3-Netscape/CARGESE3_fichiers/slide0030.htm (65 words)

	Flow Visualization (Site not responding. Last check: )
		A streakline is a line connecting all the fluid particles that have passed through a common point.
		The streakline will appear as a blue line that passes through the origin.
		In an unsteady flow, the three common forms of flow visualization: streamlines, streaklines, and pathlines are not necessarily the same.
	widget.ecn.purdue.edu /~meapplet/java/flowvis (295 words)

	Streakline (Site not responding. Last check: )
		A streakline is the locus of points of the all fluid particles that have passed continuously though a particular spatial point in the past.
		In steady flow (which is time-independent), the streamlines, pathlines, and streaklines coincide.
		For instance, the streamlines in the air around a aircraft wing are defined differently for the passengers in the aircraft than for an observer on the ground.
	www.alloffinance.com /Streakline.html (1161 words)

	Streakline
		This module calculates a streakline through a velocity field.
		This is the starting point for the streakline.
		Choices are : show each iteration, show when the solution is complete, stop (if in iteration mode), and clear the graphics output of all the streaklines.
	www.cc.gatech.edu /scivis/iris/doc/ref/stan/x1722x.htm (221 words)

	[vtkusers] streamline & streakline
		It would also have been trivial to extend that BG> to something which computes streaklines.
		If anybody has any BG> VTK code which does any of this, I would be happy to help them BG> incorporate it into the distribution.
		I dont have any code that does anything with time varying data sets but wish to express my interest for such a feature and also streaklines.
	public.kitware.com /pipermail/vtkusers/2001-October/057636.html (167 words)

	ALGOR V19.1
		Ability to display fluid flow results as streaklines - In V19.1, a new particle tracking option allows you to connect the particles of a particle path to create a streakline.
		As shown in the image, simply activate the "Connect paths as streaklines" option to see a vivid visualization of the particle path, which can help you gain a better understanding of flow patterns including turbulence.
		Note: A streakline differs from a streamline as follows: a streakline is defined as the locus of particles that have earlier passed through a prescribed point; while a streamline is defined as a line everywhere tangent to the velocity vector at a given instant.
	www.algor.com /products/releases/V19-1/default.asp (801 words)

	Streaklines (Site not responding. Last check: )
		Therefore a streakline is a family of line segments.
		A streak time ruler in the moving projects allows to fix the length of the single traces, where the interval from start time to endtime determines the total considered time interval.
		list-alloc allocates memory for a maximum of maxpoints points in a single trace of the streakline and maxsteps integrations intervals.
	www.iam.uni-bonn.de /grape/MANUAL/MANUAL.5.0/manual/node175.html (322 words)

	ME 224/CE 203: Fluid Kinematics Supplement (Site not responding. Last check: )
		A streakline is made up of all the fluid particles that have passed through a fixed point in space; this flow line is commonly used for experimental flow visualization.
		The difference between these flow lines is illustrated by these relatively simple 'cartoons' showing a top view of smoke coming from a chimney.
		The first [2] shows the steamlines (the arrows) and a streakline (the smoke).
	fluids.vuse.vanderbilt.edu /teaching/ME224/kinematics.html (184 words)

	Re: Streaklines
		Streaklines - Christian Cordeiro, Mon, 5 May 2003, 7:16 a.m.
		Re: Streaklines - Vincent, Mon, 5 May 2003, 7:42 a.m.
		Re: Streaklines - Glenn Horrocks, Mon, 5 May 2003, 4:23 p.m.
	www.cfd-online.com /Forum/cfx_archive_2003.cgi/read/4939 (87 words)

	Homework Set 2 (Site not responding. Last check: )
		Sketch a bundle of streamlines at a typical time t=0.5 both in 3D and their projections onto the x,y- and z,x-planes.
		Draw the streakline generated by a smoke generator at the point (1,0,0) both at time t=0 and at
		Also find and draw the streakline generated by a smoke generator positioned at x=1, y=2, for time t=0.
	www.eng.fsu.edu /~dommelen/courses/flm/flm95/hw2/hw2.html (260 words)

	Streakline Article, Streakline Information (Site not responding. Last check: )
		In fluid dynamics, streamlines are considered to be independent of time, while streaklines representtime-dependent vector fields.
		A streakline, on the otherhand, would begin at some starting position (in space and time) and would vary from a streamline when the next delta-t (andaccompanying vector field) was known, then again at the next delta-t, etc.
		srteakline, delta, strekaline, vector, sreakline, streamline, streaklin, andaccompanying, strealkine, known, tsreakline, displayed, streaklne, position,...
	www.anoca.org /field/delta/streakline.html (135 words)

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