,WS1-1,April 28, 2009 Inventory #002601,Introductory FLUENT Training,Workshop 1,Fluid Flow and Heat Transfer in a Mixing Tee,Workshop Supplement,WS1: Mixing Tee,Welcome!,Introductory tutorial for FLUENT starting from existing mesh (generated in earlier tutorial) model set-up, solution and post-processing,Mixing of cold and hot water in a T-piece how well do the fluids mix? what are the pressure drops?,Its a good idea to identify the key simulation outcomes from the start. You can use these to monitor progress of solution.,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-2,Workshop Supplement,WS1: Mixing Tee,Start in Workbench,If starting from a ready-made mesh file (*.meshdat), start Workbench and import the file (see screenshot below) and save the project Alternatively, start in the Workbench project that generated the mesh,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-3,Workshop Supplement,WS1: Mixing Tee,Start a FLUENT case,Drag a FLUENT analysis into the project,Drag the existing mesh into the FLUENT analysis then Update the mesh (via Right-click) to convert the mesh format,Double-click on Setup to launch FLUENT click OK on the FLUENT Launcher screen,You can see that the mesh needs to be updated, because its status icon changes.,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-4,Workshop Supplement,WS1: Mixing Tee,FLUENT interface,The main commands are reached from the navigation pane,Each item in the navigation pane brings up a new task page. A typical workflow will tackle these in order,One or more graphics windows will be available (shown here with reduced size),The console window displays text, and can accept TUI (Text User Interface) commands,Some useful commands have toolbar buttons,The Help button brings up context- sensitive help pages,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-5,Workshop Supplement,WS1: Mixing Tee,Mesh scale and check,In the General task page, press Scale select Mesh Was Created In to be in (inches) press the Scale button (once only!) and Close,Press Check and Report quality review the text output,Mesh quality is very important to getting a converged, accurate solution. The User Guide suggests that maximum cell squish and skewness should be below 0.95, which the mesh here obeys. The maximum aspect ratio is 34, which is high, but acceptable in inflation layers. If the mesh quality is unacceptable, it is best to remesh the problem before proceeding. There are other possible remedies in FLUENT, such as conversion to polyhedral cells.,The mesh check ensures that each cell is in a correct format, connected to other cells as expected. It is recommended to check every mesh immediately after reading it. Failure of any check indicates a badly-formed or corrupted mesh, which will need repairs.,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-6,Workshop Supplement,WS1: Mixing Tee,Display geometry,Press Display select Edge Type to be Feature, and press Display and then Close mesh has scaled, so press Fit to Window,Adjust the view if you like in rotation mode: drag left-mouse-button drag middle-mouse-button,rotates zooms,(to zoom in, drag down and right) (to zoom out, drag up and left),click middle-mouse-button,centre on click,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-7,Workshop Supplement,WS1: Mixing Tee,Change units of temperature,Click Units select Temperature to be c (Celsius) press Close,FLUENT stores values in SI units. Most postprocessing can be converted to other units.,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-8,Workshop Supplement,WS1: Mixing Tee,Activate models,Double-click (or click and press Edit.) these models: Energy Equation: On, Viscous model: k-epsilon, Realizable,Turbulence modeling is a complicated area. The choice of model depends on the application. Here, the Realizable k-epsilon model is used. This is an improvement on the well-established Standard k-epsilon model. Accept the remaining default settings.,Activating the Energy equation simply says that temperature changes should be simulated in the model.,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-9,Workshop Supplement,WS1: Mixing Tee,Define a new material,In Materials, click Create/Edit. press FLUENT Database. select water-liquid, press Copy, then close both windows,ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.,April 28, 2009 Inventory #002601,WS1-10,Workshop Supplement,WS1: Mixing Tee,Cell Zone Conditions,In Cell Zone Conditions, double-click the zone called fluid change the material it contains to wat