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# Topic: Stream function

 Stream function - Wikipedia, the free encyclopedia The usefulness of the stream function lies in the fact that the velocity components in the x- and y- directions at a given point are given by the partial derivatives of the stream function at that point. A stream function may be defined for any flow of dimensions greater than two, however the two dimensional case is generally the easiest to visualize and derive. Taken together with the velocity potential, the stream function may be used to derive a complex potential for a fluid flow. en.wikipedia.org /wiki/Stream_function   (674 words)

 ANSI and GNU Common Lisp Document: Streams The action of closing a stream marks the end of its use as a source or sink of data, permitting the implementation to reclaim its internal data structures, and to free any external resources which might have been locked by the stream when it was opened. A concatenated stream is an input stream which is a composite stream of zero or more other input streams, such that the sequence of data which can be read from the concatenated stream is the same as the concatenation of the sequences of data which could be read from each of the constituent streams. A stream that is an alias for another stream, which is the value of a dynamic variable whose name is the synonym stream symbol of the synonym stream. www.linux.ucla.edu /doc/gclinfo-html/gcl_21.html   (3537 words)

 Stream Function Wave Theory   (Site not responding. Last check: 2007-10-09) The velocities and total accelerations under the forward half of the stream function wave (it is moving from left to right) can be examined by clicking the mouse at any location within the water. The order of the Stream function wave is a measure of how nonlinear the wave is. In deep water, the order can be low, 3 to 5 say, while, in very shallow water, the order can be as great as 30. This is an attempt by the Stream Function theory to develop a periodic wave train, not a new wave discovery (Dalrymple and Solano, J. Waterway, Port, Coastal and Ocean Eng, 1986). www.coastal.udel.edu /faculty/rad/streamless.html   (433 words)

 For a source-sink pair, the total stream function is equal to the sum of the two individual stream functions:   (Site not responding. Last check: 2007-10-09) The stream function is produced by adding the terms of its components. This new expression for the stream function was used to plot the resulting streamlines in Matlab. We had to add the term to the stream function and alter the coordinate matrix so that the matrixes would be the right size. www.prism.gatech.edu /~gtg965h/LowAss2.html   (685 words)

 Stream Function Wave Theory   (Site not responding. Last check: 2007-10-09) The text window shows the stream function coefficients, the errors to the boundary conditions and constraints, and provides the free surface elevations with distance. By varying the wave height (rerunning the applet by using the Reset button and editing the wave parameters), you can show the effects of wave amplitude on wave length (and on wave speed, since the speed of the wave is the wave length divided by the wave period. The velocities under the stream function wave can be examined by clicking the mouse at any location within the water. www.ce.washington.edu /~cive473/Delaware/distrib/streamless.html   (258 words)

 BufferNotes   (Site not responding. Last check: 2007-10-09) Healthy stream function, the interaction of soil, water and vegetation, is what makes streams better,” says Elmore, who is based in Prineville, Oregon. Understanding that fact has led to the knowledge that grazing and stream function don’t have to collide. Streams and uplands have ability to slow it down. www.nacdnet.org /buffers/03Apr/riparian.htm   (1174 words)

 The GNU C Library   (Site not responding. Last check: 2007-10-09) Streams can be used in multi-threaded applications in the same way they are used in single-threaded applications. I.e., issuing two stream operations for the same stream in two threads at the same time will cause the operations to be executed as if they were issued sequentially. function does not return an error status and the behavior of a call for a stream which is not locked by the current thread is undefined. www.delorie.com /gnu/docs/glibc/libc_181.html   (1161 words)

 FUNDAMENTALS - 3   (Site not responding. Last check: 2007-10-09) Such a function is called the stream function because its isolines are streamlines (that is lines such that at any given time they are tangent to the velocity vector). Stream function and velocity potential are both harmonic functions of space and are related by the following equations It is not difficult to demonstrate that by using the Cauchy-Riemann conditions, lines along which the stream function is constant (streamlines) and lines along which the velocity potential is constant (isopotential lines) always intersect at right angles. www.diam.unige.it /~irro/richiami3_e.html   (216 words)

 The STREAM_IO signature = 0 corresponds to the stream being at end-of-stream. Also note that creating an output stream this way means that the stream could be unaware that the writer has been closed until the stream actually attempts to write to it. This is intended as a convenience, with the inactive stream providing a handle to the underlying file, but it also provides an opportunity to close a reader or writer being actively used by another stream. www.standardml.org /Basis/stream-io.html   (2996 words)

 [No title] It is an error to attempt to attach a stream to more than one mixer, or to attempt to generate sample data from a stream when it is attached to a mixer. For as long as the stream is attached, the mixer has a reference to it; if you call al_deref_audio_stream(), the stream will destroy itself when it ends. A mixer would then be any stream capable of incorporating data from another stream and adjusting its volume, frequency and channel distribution (panning/surround/3D) as well as keeping track of whether the stream is paused or not. alleg.sourceforge.net /future/sound.txt   (2286 words)

 Stream function   (Site not responding. Last check: 2007-10-09) In fluid dynamics, the stream function is definedfor two-dimensional flows. It is the flux across a line (any line!) between a given reference point and the point at which thevalue of the function is desired. The usefulness of the stream function lies in the fact that the velocity components in the x- and y-directions at a given point are given by the partialderivatives of the stream function at that point. www.therfcc.org /stream-function-24783.html   (131 words)

 ANSI and GNU Common Lisp Document - Streams As a minimum requirement, it should be the case that opening an output stream to a file in a given element type and later opening an input stream to the same file in the same element type should work compatibly. The act of closing a file stream ends the association between the stream and its associated file; the transaction with the file system is terminated, and input/output may no longer be performed on the stream. It is intended that standard input functions such as read and read-char, when used with this stream, cause echoing of the input into the output side of the stream. www.mat.uc.pt /~pedro/cientificos/funcional/lisp/gcl_21.html   (8466 words)

 Abstract   (Site not responding. Last check: 2007-10-09) The stream function is constant along a streamline, and the difference in its value for two streamlines represents the total flow between these streamlines. In the context of the analytic element method (AEM), a technique had been developed which allows the stream function to be used in models which include areal recharge or leakage. By treating these solutions to Poisson's equation separately, the stream function can be utilized in a manner similar to that for flow without areal recharge or leakage. www.indiana.edu /~grwater/abstracts/art4.html   (188 words)

 Rice University - Ceng301 - Section 3.3 Page 2 A 0 stored in the second column indicates that the stream is a solid, a 1 indicates that it is a liquid and a 2 indicates it is a vapor. The function setne is used to set all the flow and state conditions for the exit streams. Stream 2 would get 20% of the flow, as a vapor at 400 Tdeg, stream 3 would get 30% as vapor at 300 Tdeg, and stream 4 would get the remaining 50% as liquid at 200 Tdeg. www.owlnet.rice.edu /~chbe301/33b.html   (4239 words)

 Re: Stream Function So the stream function value at point M with respect to a reference point M0 is Stream Function - Beginner, Sun, 8 Dec 2002, 8:10 p.m. Re: Stream Function - Noname, Mon, 9 Dec 2002, 3:14 a.m. www.cfd-online.com /Forum/main_archive_2002.cgi?read=24768   (160 words)

 VMPC One-Way Function and Stream Cipher   (Site not responding. Last check: 2007-10-09) The VMPC function has a simple formal definition and the value of the function can be computed with 3 one-clock-cycle, instructions of an Intel 80486 and newer or compatible processor per byte. The simplicity of the VMPC one-way function could raise a question whether it might be possible to prove the lower bound on the complexity of inverting it. For a detailed description of the algorithm of inverting the VMPC function and example complexities of inverting the function for permutation sizes smaller than 256, see 6. www.vmpcfunction.com /function.htm   (733 words)

 The GNU C Library - Input/Output on Streams This function causes all open streams of the process to be closed and the connection to corresponding files to be broken. When writing code which uses streams and which can be used in different contexts it is important to query the orientation of the stream before using it (unless the rules of the library interface demand a specific orientation). One of the arguments you pass to this function is a pointer to a handler function that produces the actual output; see section Defining the Output Handler, for information on how to write this function. www.linuxselfhelp.com /gnu/glibc/html_chapter/libc_12.html   (12439 words)

 Stream Function - Potential Function coordinates Since stream function follows the surface of the cylinder I thought it might be a good idea to use it as a coordinate system. Re: Stream Function - Potential Function coordinat - Jonas Holdeman, Thu, 23 Jun 2005, 12:58 p.m. Re: Stream Function - Potential Function coordinat - Harish, Thu, 23 Jun 2005, 5:24 p.m. www.cfd-online.com /Forum/main_archive.cgi?read=37732   (212 words)

 CLHS: Function READ-LINE Reads from input-stream a line of text that is terminated by a newline or end of file. If recursive-p is true, this call is expected to be embedded in a higher-level call to read or a similar function used by the Lisp reader. The primary value, line, is the line that is read, represented as a string (without the trailing newline, if any). www.lispworks.com /documentation/HyperSpec/Body/f_rd_lin.htm   (193 words)

 seekdir() -- set position for next read of directory stream   (Site not responding. Last check: 2007-10-09) operation on the directory stream specified by dirp to the position specified by loc. Points to the directory stream, for which the current location is to be set. Is the location to which directory stream is to be set. www.datafocus.com /docs/man3/seekdir.3.asp   (96 words)

 CLHS: Function OPEN-STREAM-P   (Site not responding. Last check: 2007-10-09) Returns true if stream is an open stream; otherwise, returns false. Streams are open until they have been explicitly closed with close, or until they are implicitly closed due to exit from a with-output-to-string, with-open-file, with-input-from-string, or with-open-stream form. Should signal an error of type type-error if stream is not a stream. www.lisp.org /HyperSpec/Body/fun_open-stream-p.html   (66 words)

 Home - Stream Function Inc. That is why we use Stream Function to help verify the design before construction in our Edmonton facility begins. Stream Function Inc. specializes in the use of modelling tools to analyse the hydraulic and thermal performance of process equipment and real world systems. Stream Function can be a valuable partner in your technical network. www.streamfunction.ca   (309 words)

 Stephen Waydo - Stream Function Movies   (Site not responding. Last check: 2007-10-09) The objective of the robot being controlled by the stream function is to capture a "flag" located at the center of the opposing team's defense zone (taped circle) and return to its initial location without running into defenders which are passively orbiting the defense zone (i.e. One of the nice features of this algorithm is that is very naturally handles obstacle motion with a dynamic component that is simply superimposed on the static stream function. Another useful feature of the stream function approach is that behaviors other than simple goal seeking can be encoded. www.cds.caltech.edu /~waydo/streammovies/streammovies.html   (260 words)

 The Package Text_IO.Text_Streams The package Text_IO.Text_Streams provides a function for treating a text file as a stream. The Stream function has the same effect as the corresponding function in Streams.Stream_IO. 34 The ability to obtain a stream for a text file allows Current_Input, Current_Output, and Current_Error to be processed with the functionality of streams, including the mixing of text and binary input-output, and the mixing of binary input-output for different types. www.adapower.com /rm95/RM-A-12-2.html   (104 words)

 The stream function   (Site not responding. Last check: 2007-10-09) There exist some beautiful mathematical relations between the stream function and the velocity potential for a flow which is both incompressible and irrotational. which means that the velocity potential and the stream function are orthogonal functions. 7.4 are the curves on which this function is constant. astron.berkeley.edu /~jrg/ay202/node96.html   (220 words)

 One Page - Hawaii Stream Research Center The Hawaii Stream Research Center was established in July 1996 as a cooperative project between the University of Hawaii (Center for Conservation Research and Training), the State Department of Land and Natural Resources (Aquatic Resources Division), and the National Tropical Botanical Garden (Limahuli Gardens). The mission of the Hawaii Stream Research Center is to assist the State of Hawaii in its efforts to develop responsible, effective, science-based management policies and strategies which provide for the long-term sustainability and enhancement of aquatic ecosystems. To fulfill its mission, the HSRC is pursuing basic and applied research directed at understanding the ecological functioning of Hawaiian streams in relation to riparian zones, watersheds, estuaries, and nearshore marine habitat. www.hawaii.edu /hsrc/home   (238 words)

 The Streams Dictionary [CLHS-21.2]   (Site not responding. Last check: 2007-10-09) , this function permits mixed character/binary input from a stream. When a #\Newline is output to (respectively input from) a file stream, its file position is increased by 2 since #\Newline is encoded as CR/LF in the file. means that buffered file streams will be returned for regular files and (on Unix) block-devices, and unbuffered file streams for special files. clisp.cons.org /impnotes-new/stream-dict.html   (364 words)

 PHP: stream_wrapper_register - Manual You must also update the read/write position of the stream by the number of bytes that were successfully read. You must also update the read/write position of the stream by the number of bytes that were successfully written. calls on the stream and should return an array containing the same values as appropriate for the stream. www.php.net /manual/en/function.stream-wrapper-register.php   (1240 words)

 I.1.3 Stream function For two-dimensional calculations of incompressible flows, a very practical way to visualize the solution, is to look at iso-value of the stream function. One presents in sections I.1.3.1 and I.1.3.2 the equations governing the calculation of stream function in Cartesian and cylindrical coordinate systems respectively. This means that the stream function can not be used to represent a three-dimensional flow. users.skynet.be /keyFE2/manual/I_1_3_Stream_function.html   (242 words)

 VMPC One-Way Function and Stream Cipher (szyfrowanie)   (Site not responding. Last check: 2007-10-09) It offers advanced key generation functions with key sizes up to 512 bits. The VMPC one-way function is a combination of elementary operations on permutations and integers. function can be computed with 3 elementary computer processor instructions per byte. www.vmpcfunction.com   (461 words)

 CLHS: Function CONCATENATED-STREAM-STREAMS   (Site not responding. Last check: 2007-10-09) Returns a list of input streams that constitute the ordered set of streams the concatenated-stream still has to read from, starting with the current one it is reading from. The list may be empty if no more streams remain to be read. The consequences are undefined if the list structure of the streams is ever modified. www.lisp.org /HyperSpec/Body/fun_concatena_ream-streams.html   (70 words)

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