SimCafe

Space shortcuts

Child pages
  • Turbulent Pipe Flow (LES) - Pre-Analysis & Start-Up

Versions Compared

Old Version 26

changes.mady.by.user user-0108f

Saved on

compared with

New Version 27

changes.mady.by.user user-0108f

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.
Comment: Migrated to Confluence 4.0
Include Page
SIMULATION: FLUENT Google AnalyticsSIMULATION:
FLUENT Google Analytics
Include Page
SIMULATION: Turbulent Pipe Flow (LES) - PanelSIMULATION:
Turbulent Pipe Flow (LES) - Panel

...

Since we are solving for Ū(x,t), the LES is an unsteady simulation where we march in time. In order to collect statistics like the mean and the root mean square (r.m.s.) velocities, we need to first reach a statistically stationary state. In comparison, simulation using k-ε model solves only for the mean velocity.

Wiki MarkupMore information on the LES can be found in Turbulent Flows book by Pope\[2000\].

Start ANSYS FLUENT

Since LES is a three-dimensional unsteady simulation, the computational domain is a full pipe. 

Prior to opening ANSYS, create a folder called turbulent_pipe_LES in a convenient location. We'll use this as the working folder in which files created during the session will be stored. For this simulation Fluent will be run within the ANSYS Workbench Interface. Start ANSYS workbench:

Start> All Programs> Ansys 14.0> Workbench 14.0

The following figure shows the workbench window.

...