Boundary Conditions

Boundary Condition Assignment

Boundary conditions are assigned automatically in WAND meshing. However, for custom turbomachinery meshes or non turbomachinery applications, boundary conditions will have to be assigned manually. This can be done by modifying the .REST directly with ads-gleo and ads-pleo or through the boundary condition assignment table in the Pointwise meshing software.

The ADS CFD boundary conditions are listed and described below.

Available Boundary Conditions

  • 1  FLOW TANGENCY
  • 2  UP-STREAM
  • -2 UP-STREAM, CONSTANT TANGENTIAL VELOCITY
  • 3  DOWN-STREAM
  • 4  FARFIELD IN/OUT
  • 5  CASCADE UP-STREAM
  • 6  CASCADE DOWN-STREAM
  • 7  NO FLOW NORMAL TO THE SURFACE
  • 8  WALL FUNCTION
  • 9  NON-SLIP WALL WITH Q INPUT
  • 10 NON-SLIP WALL Q = 0.0
  • 11 NON-SLIP WALL IN STATIONARY FRAME
  • 12 INLET FLOW NORMAL TO MESH
  • 13 PERIODIC FACE
  • 14 PERIODIC WITH FACE 13
  • 15 CONSTANT T WALL FOR HEAT CONDUCTION
  • 16 ADIABATIC WALL FOR HEAT CONDUCTION
  • 17 INTERSECTOR PERIODIC WITH FACE
  • 18 INTERSECTOR - PERIODIC WITH FACE 17
  • 2008 WALL FUNCTION - CHT

1 Flow Tangency

There is no velocity component normal to the wall
Same as 7

2 Up Stream

Holds total pressure, total temperature, and flow angles on the face

-2 Up Stream, Constant Tangential Velocity

Holds total pressure, total temperature, tangential velocity components, and average flow angle on the face

3 Down Stream

Holds a user specified static pressure distribution on the face

4 Farfield In/Out

A general inlet/outlet boundary condition allowing flow to penetrate both ways freely

5 Cascade Up Stream

Ensure a non reflective boundary while holding total pressure, total temperature, and flow angles

6 Cascade Down Stream

Ensures radial equilibrium and a non reflective boundary while holding the static pressure at mid span and letting it vary to each end wall
NOTE: In a structured mesh, midspan is assumed to be the median k-plane

7 No Flow Normal To The Surface

There is no velocity component normal to the wall
Same as 1

8 Wall Function

Flow solution from the wall to the first node off the wall is handled by an algebraic function

9 Non Slip Wall With Q Input

Wall integration near the wall, velocity = 0 at the wall, and includes heat transfer

10 Non Slip Wall With Q = 0.0

Wall integration near the wall, velocity = 0 at the wall, and does not include heat transfer

11 Non Slip Wall In Stationary Frame

Wall integration near the wall and velocity = 0 at the wall for a boundary with RPM = 0

12 Inlet Flow Normal To Mesh

Holds total pressure, total temperature, and only velocity components normal to the face are not 0

13 Periodic Face

Periodic face to be matched with BC 14

14 Periodic With Face 13

Periodic face to be match with BC 13

15 Constant T Wall For Heat Conduction

In a heat conduction problem, holds wall temperature constant

16 Adiabatic Wall For Heat Conduction

In a heat conduction problem, enforces an adiabatic condition on the wall

17 Intersector Periodic With Face

Intersector periodic face to match with 18

18 Intersector Periodic With Face 17

Intersector periodic face to match with 17

2008 Wall Function - CHT

Type 8 boundary condition reserved for non CHT surfaces when running CHT

possibly remove to avoid confusion

Code
Author
Raf Mudafort
Date Created
2015-07-31 04:59:45
Date Updated
2015-08-05 02:18:11
Views
3330