Rotate> PlaneXZ" "View> Rotate> PlaneXZ" Create column points: "Geometry>Create>Point“ -Enter the following coordinates in command line and Enter after each point column points Box points 0.0, 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, 0.7 column points Box points 0.0, 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, 0.7 Geometry"> Rotate> PlaneXZ" "View> Rotate> PlaneXZ" Create column points: "Geometry>Create>Point“ -Enter the following coordinates in command line and Enter after each point column points Box points 0.0, 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, 0.7 column points Box points 0.0, 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, , 0.0, 0.7 Geometry">

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_____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos.

Published byAugusta Morris Modified over 8 years ago

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Presentation on theme: "_____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos."— Presentation transcript:

1 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Kratos 3D Fluid Analysis Tutorial Pooyan Dadvand Kazem Kamran Kratos Team

2 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 In this part we put the column of the previos section in a wind tunel. Geometry Input data and Conditions PostProcesing Kratos 3D Fluid Tutorial

3 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Create points: Choose XZ plane as the view "View> Rotate> PlaneXZ" "View> Rotate> PlaneXZ" Create column points: "Geometry>Create>Point“ -Enter the following coordinates in command line and Enter after each point column points Box points 0.0, 0.0, 0.0 -2.0, 0.0, -0.5 0.2, 0.0, 0.0 -2.0, 0.0, 0.7 0.0, 0.0, 0.2 6.2, 0.0, -0.5 0.2, 0.0, 0.2 6.2, 0.0, 0.7 column points Box points 0.0, 0.0, 0.0 -2.0, 0.0, -0.5 0.2, 0.0, 0.0 -2.0, 0.0, 0.7 0.0, 0.0, 0.2 6.2, 0.0, -0.5 0.2, 0.0, 0.2 6.2, 0.0, 0.7 Geometry

4 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Geometry

5 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 And now the lines, "Geometry>Create>Straight line” "Geometry>Create>Straight line”+ “Ctrl + a” And now click successivly on the column points Geometry

6 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Esc After finishing column click “Esc” and continue with the box lines Geometry

7 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Next step is to make it 3D, "Utilities>Copy" Choose following options in the “copy” window: “Entities type” : Lines “Transformation”: Translation “First point”: one of the column point “Second`point”: Enter the same point but with “y coordinate = 2” “Do extrude”: Lines And don´t change other options. Select 4 lines of the column. Geometry

8 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 2 Geometry

9 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Geometry

10 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 The same we do for the “Box”: First point: (-2,0,.7) don´t forget to write (-2,2.5,.7) second as the second point Geometry

11 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 3 surafcestopbottom As you see 3 surafces on the top and bottom are missed so "Geometry> Create> NURBS surfaces> By contour" Now choose 4 top lines of the “Column” and do “Esc” to create the surface Geometry

12 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 4 top lines Geometry

13 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 *Repeat the same process fot the top surface of the “Box” "Geometry> Create> NURBS surfaces> By contour" Now choose 4 top lines of the “Box” and do “Esc” to create the surface bottom surface For the bottom surface of the “Box” choose 4 lines of the “Box” and 4 lines of the “Column” at the same time to consider the hole at the bottom Geometry

14 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Geometry

15 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Cerate Volume: "Geometry> Create> Volume> By contour" "Geometry> Create> Volume> By contour" Choose all existing surface “Esc” Choose all existing surface (you can simply do by opening a left window on all the model) and then “Esc” to create the volume. Geometry

16 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Geometry

17 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 "Data> Pronlem type>fluid_only" "Data> Pronlem type>fluid_only" In the appearing window choose “Transform” option. *In the case that there is no “fluid_only” problem_type copy it from the “Incompressible_fluid_application” Problem Type

18 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Material properties: "Data> Conditions> Nodal value" Assign density and viscosity: volume density In the window at first line choose "volume" icon and in the second "density“. Repeat the same for viscosity.(next slide) Material

19 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Input data and conditions

20 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Input data and conditions

21 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Element type: "Data> Conditions> Elements" Fluid3D Choose volume "icon" and "Fluid3D" as the element and then "Assign" to the volume Input data and conditions

22 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Input data and conditions

23 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Boundary treatment: Boundary treatment : "Data> Conditions> Model Parts" Choose area "icon" and " VelocityInlet " as the options, VELOCITY X=10.0 and the rest 0 and Fixed. "Assign" to the input area. Input data and conditions

24 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Inlet velocity surface Input data and conditions

25 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Boundary treatment: Boundary treatment : "Data> Conditions> Model Parts" Choose area "icon" and " NoSlipCondition" Assign 0 and Fixed condition to all areas except input and output. Input data and conditions

26 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Noslip surfaces

27 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Boundary treatment: Boundary treatment : "Data> Conditions> Nodal Value" Choose area "icon" and " Pressure" Assign 0 and Fixed condition to outlet wall. (A continous Laplacian Fractional step solver is going to use) Input data and conditions

28 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Mesh: *Choose element type: “Mesh> Element type>Tetrahedra" Choose volume of the model(Blue volume) *Generate mesh: “Mesh>Generate mesh“ (choose 0.25 as the size) (choose 0.25 as the size) Analysis

29 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Analysis

30 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Problem Parameters: “Data> Problem Data>Problem Parameters" “max time”: 2 “Laplacian form”: 1 Click “Accept” Analysis

31 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Analysis

32 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Calculate: “Calculate> calculate" If the model is build correctly it is now running and you can see in “Calculate> View process info" Analysis

33 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 “View> Mode>Post Process" Results can be seen by “post process part of the GID” Now load the post process file: “Files> Open" “Files> Open" From the example archive choose “*.bin” file Post Processing

34 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009

35 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Pressure: “View results> Counter Fill>Pressure“ “Ctrl + m” By “Ctrl + m” you can see the pressure movie If you want to see inside view : “Windows> View Style“ CullingFront Face And then from the “Culling” option choose “Front Face” Post Processing

36 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Front face Post Processing

37 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Velocity Cut: “View results> Counter Fill>Velocity“ cut To make a cut “Do cuts> Cut plane>3 points“ “Do cuts> Cut plane>3 points“ “Enter” To have a cut of the middle plane enter following 3 coordinates at the command line and “Enter” after each: Cut-plane points -2.0, 1.25, 0.7 -2.0, 1.25, -0.5 6.2, 1.25, 0.7 Cut-plane points -2.0, 1.25, 0.7 -2.0, 1.25, -0.5 6.2, 1.25, 0.7 Post Processing

38 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Velocity Cut: To see just the cut “Windows> View Style“ “Windows> View Style“ Turn off the light bulb of KRAOS to see just the cut plane “View results> Counter Fill>Velocity“ “Ctrl + m” By “Ctrl + m” you can see the velocity movie Post Processing

39 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Post Processing

40 _____________________________________________________________________________________________________________________ GiD-Kratos Singapore Workshop Kratos Fluid Analysis October 2009 Thanks… Kratos Web page: http://www.cimne.com/kratos/ Kratos Wiki http://kratos.cimne.upc.es/kratoswiki/index.php/Main_Page These Tutorials: http://kratos.cimne.upc.es/kratoswiki/index.php/Kratos_Tutorials

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