Introduction to CFXdl. CFX Workflow Introduction to CFX Workbench and CFX Workflow 2-2 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. April 28, 2009 Inventory #002598

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Chapter 2

Introduction to Workbenchand CFX Workflow

Introduction to CFX

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Training ManualThe Workbench Environment

For most situations the Workbench GUI is divided into 2 primary

sections (there are other optional sections well see in a moment):

The Toolbox The Project Schematic

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Training ManualThe Toolbox

The toolbox contains 4 subgroups:

Analysis systems:

Predefined templates that can be

placed in the schematic.

Component systems:

Various applications that can be

accessed to build, or expand,

analysis systems.

Custom Systems:

Predefined analysis systems for

coupled applications (FSI, thermal-

stress, etc.). Users can also create

their own predefined systems.

Design Exploration:

Parametric management and

optimization tools.

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Training ManualThe Toolbox

The systems and components

displayed in the toolbox will

depend on the installed

products.

Using the check boxes in the

View All / Customize

window, the items displayed

in the toolbox can be toggled

on or off.

The toolbox customization

window is normally left closed

when not in use.

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Training ManualThe Project Schematic

The Workbench project schematic is a graphical representation of the

workflow defining a system or group of systems.

The workflow in the project schematic is always left to right.

There are currently several applications which are native to

Workbench, meaning they run entirely in the Workbench window:

Project Schematic, Engineering Data and Design Exploration

Non-native applications (called data-integrated) run in their own

window:

Mechanical (formerly Simulation), Mechanical APDL (formerly ANSYS),

ANSYS Fluent, ANSYS CFX, Etc . . .

Blocks of cells can be deleted by RMB menu selection.

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Training ManualThe Project Schematic

In this example a Static Structural analysis type is selected for the

project schematic.

From the toolbox the selection can be dragged and dropped onto

the schematic or simply double clicked.

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Training ManualThe Project Schematic

In the example shown a

structural system is dragged and

dropped onto a thermal system

at the Model cell (A4).

Before completing the operation

notice there are a number of

optional drop locations that

will provide various types of

linkage between systems

(continued next page).

By dropping applications and/or analyses into various locations in

the schematic, an overall analysis project is defined.

Connectors indicate the level of collaboration between systems.

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Training ManualThe Project Schematic

By completing the operation from the previous page, notice the

linkage here is only at the Model level and above.

In this case there would be no thermal/structural coupling.

Notice too each system block is given an alphabetic designation (A,

B, C, etc.).

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Training ManualThe Project Schematic

By dropping the structural system at the Solution level we obtain a

structural system that is coupled to the thermal solution.

Notice, the candidate

drop location

indicates data will be

shared from fields A2

to A4, and

transferred from A6.

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Training ManualThe Project Schematic

A schematic can also be constructed by RMB and choosing to

Transfer Data To New or Transfer Data From New.

In using the RMB transfer feature all transfer possibilities (upstream

and downstream) are displayed.

These selections will vary depending on which cell in a particular

system you highlight.

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Training ManualThe Project Schematic

Identifying cell states:

Unfulfilled: missing upstream data.

Attention required: may need to correct this or upstream cells.

Refresh required: upstream data has changed. Need to refresh cell. An update

will also refresh the cell and regenerate any output data (e.g. mesh, results).

Update required: the data has changed and the output of the cell must be

regenerated.

Up to date.

Input changes pending: cell is locally up to date but may change when the next

update is performed due to upstream changes.

Interrupted: solver was manually stopped before it finished. Can use Resume

or Update to continue to solving.

Pending: a batch process is in progress

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Training ManualOptional Workbench Windows

The View menu (and RMB) allows additional information to be

displayed in the Workbench environment.

Below, the geometry is highlighted and the properties are displayed.

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Training ManualWorkbench File Management

Workbench creates a project file and a series of subdirectories to

manage all associated files.

Users should allow Workbench to manage the directories.

Please do NOT manually modify the content or structure of the project

directories.

When a project is saved a project file is created (.wbpj), using the

user specified file name (e.g. MyFile.wbpj).

A project directory will be created using the project name. In the

above example the directory would be MyFile_files.

A number of subdirectories will be created in the project directory.

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Training ManualWorkbench File Management

From the Workbench View menu activate the

Files option to display a window containing file

details and locations.

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Training ManualWorkbench File Management

Archive: quickly generates a single

compressed file containing all pertinent files.

File is zip format and can be opened using the

Restore Archive . . . utility in WB2 or any

unzip program.

Several options are available when archiving

systems as shown here.

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Training ManualStarting CFX

CFX can be launched from:

The CFX 12.0 Launcher

Start > All Programs > ANSYS

12.0 > CFX > ANSYS CFX 12.0

Within ANSYS Workbench

Drag Analysis Systems > Fluid

Flow (CFX) or Component

Systems > CFX onto the

Project Schematic

The command line

More common under

Linux/Unix

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Training ManualTry It Yourself!

Now launch Workbench on your training machine

Start > All Programs > ANSYS 12.0 > ANSYS Workbench

Expand the Component Systems toolbox and add a CFX system to

the Project Schematic

Drag a second CFX system onto the Project Schematic, dropping it

onto the Solution cell of the first

The first Solution is used as the starting point for the second Solution,

e.g. a steady-state run followed by a transient run

Right-click on the Setup cell in the first system and select Edit

This will open CFX-Pre

You can leave CFX-Pre open for now

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