ࡱ> '` 5?bjbj{P{P u::6$< < < $` 999P9\:` cU <LX<:<<<V>?Lj?(TTTTTTT$!WhYU< MCR>V>MCMCU<<UIIIMCT8<< <TIMCTIIbL$ < M<< *3y9DLN3U0cUMYZEYZ(MYZ< M?x@IAA???UUI^???cUMCMCMCMC` ` ` $ )` ` ` )` ` `    INCLUDEPICTURE "http://www.csun.edu/~pubrels/NewLogoSm.JPG" \* MERGEFORMATINET College of Engineering and Computer Science Mechanical Engineering Department Mechanical Engineering 692 Computational Fluid Dynamics INCLUDETEXT "include.doc" firstPage \* MERGEFORMAT Spring 2010 Number: 17535 Instructor: Larry CarettoCourse Outline Catalog Description Prerequisite: ME 309 and ME 490. Introduction to the numerical analysis of fluid flows. Special techniques required for solution of the governing equations for viscous, inviscid and boundary layer flows. Applications to convective heat and mass transfer. Turbulence modeling and other submodels for complex engineering applications. Course and Instructor Information Instructor informationInstructorLarry CarettoOffice LocationJacaranda (Engineering) 3333Phone Number818.677.6448Fax Number818.677.7062Email addresslcaretto@csun.eduOffice hoursMonday and Wednesday, 5 to 6 pm, Tuesday and Thursday 2 to 3 pm, and other times by email, drop-in. telephone call, or appointment Course informationClass meeting timeMondays and Wednesdays 7 to 8:15 pmClassroom locationJacaranda 1592Course web sitehttp:/www.csun.edu/~lcaretto/me692Course number17535Expanded Description The objectives of this course are to introduce students to the basic ideas of computational fluid dynamics (CFD) which is the numerical analysis of problems involving fluid mechanics and heat transfer. Students who take this course should be able to understand and make better use of commercial CFD codes. Interested students may go on to MS theses or PhD programs in this area. The course has two main components. The first is an understanding of the theory underlying CFD codes so that students can become better users of such codes. The second is the operation of a typical CFD code, FLUENT, which is installed in computers in the ME Department. Computational fluid dynamics has rapidly emerged from an advanced research area in the 1970s to a useful engineering design tool today. Engineers working in this field use commercial or generally distributed codes that were developed by a research facility or a commercial vendor. Users of these codes must have a significant knowledge of their operation in order to use them effectively. An understanding of the underlying equations solved, the need for and operation of turbulence models, and the numerical procedures used in CFD is an important factor in this effective use. Students who successfully complete this course should have that basic understanding that will allow them to use CFD codes effectively. Students taking this course are assumed to have some background in basic numerical analysis and in the differential equations of fluid dynamics. These topics will be reviewed briefly at the start of the course. By the end of the course, students should have a better appreciation of the physical and numerical bases for common codes used in computational fluid dynamics. They should also be able to read the literature in the subject. Text H. K. Versteeg and W. Malalasekera, An Introduction to Computational Fluid Dynamics The Finite Volume Method (second edition), Pearson Prentice Hall, 2007, ISBN: 978-0-13-127498-3. Course Conduct Active Learning Students are expected to read the text and notes before class and be prepared to discuss the material in the text or notes during class. The use of in-class discussion should enhance student learning as compared to only having lecturing by the instructor. Course Objectives as a result of taking this course, students should: Understand how the basic differential equations of fluid dynamics and convective heat and mass transfer are derived, and understand the similar form of these equations. Be able to apply the knowledge gained in the course in the operation of commercial CFD codes. Understand the overall process by which numerical solutions of differential equations are obtained. Understand the three main processes (finite differences, finite volumes, and finite elements) by which differential equations are transformed into algebraic equations. Be able to convert partial differential equations into finite difference relations and determine the order of the truncation error. Be able to use concepts of stability to determine appropriate relaxation factors and dimensionless parameters used as inputs to commercial codes. Understand algorithms of computational fluid dynamics and be able to determine appropriate ones to obtain solutions from commercial codes. Be familiar with turbulence models and be able to choose an appropriate model for a specific problem. Computer Use The department has twenty-five seat licenses for the use of a commercial CFD code known as Fluent. This software is available in our classroom, the ME computing facility located in Jacaranda (Engineering) 1116/1118, and the common computing lab for the College of Engineering and Computer Science located in JD 1622. Students who do not currently have access to the ME computing lab should contact the ME Department Office in JD 4513 to get a lock password. We will be using this code at some times during the course to illustrate the use of commercial codes. Students will generally use this code for their project (see below), and you will be asked to run some of the tutorial programs to learn the use of the code. As a commercial code, Fluent requires the input of geometry and computational grid from some other CAD package. You can also use the CAD package, Gambit, which is developed by Fluent. The development of the geometry (and the associated mesh) is perhaps the most difficult and time-consuming step in using the program. Fluent is generally regarded as the best selling CFD code, but it is only one of several codes that are commercially available. Grading Your grade in this course will be based on weekly homework assignments, one midterm, the final exam and a project report. The project report is discussed in detail below. The various course requirements will be weighted as follows in computing the final grade: Homework 10% Midterm 25% Project report 25% Final 40% The translation of a final numerical score into a letter grade rests solely on the judgment of the instructor. The following criteria will be used for letter grades. As indicated below, plus-minus grading will be used in this course. A: Student knows almost all of the course material and is able to apply it to new problems similar to those covered in the course. A-: Student satisfies one, but not both, of the conditions for an A grade. B+: Student understands the fundamental aspects of the course and is able to apply this knowledge to routine uses of computational fluid dynamics. B-: Student has learned some course material but is not able to apply all the fundamental points of the course. C: Student has failed to demonstrate knowledge of the course material beyond a minimal level. F: Student has violated campus guidelines for submitting work that was not done by the student. Plagiarism vs. Collaboration Students usually work together on assignments. This collaboration is helpful and encouraged. By working together each of you can improve your learning of the subject. However, there is a difference between working together to learn the material and copying another students work and passing it off as your own. The latter is a violation of academic standards and is improper behavior for students preparing for a professional career in engineering or sciences. Consequently, each student must submit his or her own work to pass the course. Identical solutions on quizzes or exams, indicating copying, will result in an F grade in the course for both students involved. Students who are found cheating by submission of identical assignments or any other observations will be referred to the Office of the Dean of Students for disciplinary action. Project Report Each student will select a project from the following list: 1. Running a commercial code available at the students work site. 2. Running a commercial code at CSUN, typically Fluent. 3. Writing a code to solve a simple CFD problem. 4. Some other project proposed by the student and approved by the instructor. Students should prepare a one-page project proposal to be submitted on March 8. Students give a brief presentation of their projects to the class on May 3 and May 5. A final written report on the project must be submitted by 11:59 pm on Wednesday, May 12 (two days after the final exam). Make-up Examinations Students must complete the project and the final examination to pass the course. There will be no make-up examinations for the midterm. Students who do not take the midterm will receive a grade for that examination based on their performance on the final. Late assignments Late assignments will be assessed a penalty of 10% of the maximum possible grade for each week for fraction of a week that they are late. If this penalty results in a negative score for the assignment, a grade of zero will be assigned. Changes Students are responsible for all changes to this outline announced in class. Class schedule The reading assignments in the text by Versteeg and Malalasekera are shown below as page numbers following the authors initials, V&M. Reading assignments in the instructors notes are indicated by Notes, followed by the index number of the notes. DateLecture TopicReadingJanuary 18HolidayJanuary 20Course overview; begin discussion of basic equations in CFD.V&M 1-13January 25Complete derivation of basic differential equations for CFD. Note general form of all conservation equations.V&M 14-26 Notes 1January 27Introduction to Fluent code. Use of tutorials to determine various inputs. Fluent solution for a mixing elbow with a predetermined mesh. Setting properties, models, initial conditions, and solution parameters. Fluent introduction tutorialFebruary 1Introduction to turbulence. Physics of laminar and turbulent flows. Importance of turbulence in CFD. Need for turbulence models. Fluctuating quantities in turbulent flow.V&M 40-65 Notes 7February 3Handling turbulent boundary conditions in codes. Wall functions. Resolving the laminar sublayer. Correct selection of models and grids.V&M 65-97February 8Use of turbulence models in Fluent. Choosing turbulence models and setting parameters and wall functions.February 10Introduction to the finite-volume method to steady diffusion problems. Grid and control volume notation. Errors in finite-difference representations.V&M 115 -133 & 445 447 February 15Numerical analysis and accuracy of problem solving in steady diffusion.Notes 2.3 2.11February 17Individual practice in Fluent. Students to choose problems depending on interest and confidence from first two exercises.February 22Application of the finite-volume method to steady convection problems. Limitations of central difference method.V&M 134-144February 24Assessment of differencing schemes in steady convection problems. Upwind method, hybrid method and quick differencing scheme..V&M 145-164March 1Total-variation-diminishing (TVD) differencing methods. Accuracy improvements with no wiggles.V&M 165-178March 3Differencing schemes in Fluent. Effect of user choice of differencing schemes on accuracy of results.March 8Solving the momentum and continuity equations to get the flow velocities and the pressure. Use of the staggered grid. The SIMPLE algorithm. Project proposals due.V&M 179-190March 10Modifications of the SIMPLE algorithm: SIMPLEC, SIMPLER and PISO. Increase in work per step to reduce overall computation time.V&M 191-211March 15Pressure-velocity coupling schemes in Fluent. Effect of user choice of such schemes on accuracy of results.March 17Numerical solution of equations and criteria for convergence of iterations. (See notes 2.26-2.27 and 3.26 3.32)V&M 212-242March 22Fluent/Gambit Exercise. Development of grids for known geometry.March 24Review for midtermMarch 29MidtermMarch 31HolidayApril 5Spring BreakApril 7Spring BreakApril 12Unsteady flows. The distinction (and similarities)between solving transient flows and iterating steady flow solutions.V&M 243-266April 14Correct implementation of boundary conditions in finite-volume flow solutions.V&M 267-284April 19Fluent exerciseApril 21Determining accuracy of results in CFD. Validation of CFD results.V&M 283-303April 26Grid generation for complex geometries. Finite difference expressions for unstructured grids.V&M 304-319April 28Convection terms in unstructured grids. Treatment of pressure-velocity coupling with collocated variables.V&M 304-319May 3Presentation of student projects.May 5Project presentations continued. Review for final exam.May 10Final exam, Monday, 8 to 10 pmHomework Homework assignments and solutions can be downloaded from . References Visit the web site http://www.cfd-online.com/ for a comprehensive list of books, journals, commercial codes, and other references for CFD. Several journals are available online from the CSUN library. You can also search for topics in databases of technical articles. To search the library catalog go to  HYPERLINK "http://library.csun.edu/" http://library.csun.edu/ and select periodicals. The site  HYPERLINK "http://library.csun.edu/xerxes/multisearch/engineering" http://library.csun.edu/xerxes/multisearch/engineering is the starting point to find journal articles in various engineering databases. (This site can also be reached by following links from the library.csun.edu site to Find Articles & Research Data, Engineering, and Engineering Multisearch.)     Jacaranda (Engineering) 3333 Mail Code Phone: 818.677.6448 E-mail:  HYPERLINK mailto:lcaretto@csun.edu lcaretto@csun.edu 8295 Fax: 818.677.2140 Course Outline  INCLUDETEXT "include.doc" headerCenter \* MERGEFORMAT ME 692, L. S. 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