## FLUENT 6 - Identifying cells on the free surface interface to define inter-phase mass transfer. |

While modeling heterogeneous mass and heat transfer using the VOF model, it is often required to define a mass transfer coefficient only in cells that contain the interface.<br>For a simple... |

## FLUENT 6 - Solver/Monitor error about unrecognized turbulent function: Error: Cell_Function_Values: unrecognized function: production |

When switching from one turbulence model to another which is using different transport equations/parameters, and when monitors of turbulent parameters have been defined, the solver will give an... |

## POLYFLOW - adaptive meshing is activated although element quality is very good |

A mesh contains triangles which are nearly equilateral. The simulation involves adaptive meshing, with Tquality = 0.25 and the element size = 0.05 or 0.02, e.g. A simulation is defined such that... |

## POLYFLOW - non-conformal interface for internal flow simulation yields strange temperature results |

A non-isothermal flow simulation involving non-conformal interface and (discontinuous) temperature imposed along outside walls may produce unrealistic (unphysical) temperature distribution, while... |

## POLYFLOW - a ramp function defined via a UDF? |

How to define a ramp function of time or of evolution parameter via a UDF, e.g. for use as a dependence function for a submodel?<br>A typical function may look like (ID 315 or 316 in the... |

## FLUENT 6 - Non-zero dynamic pressure values on the wall |

Dynamic pressure is defined as 0.5*rho*V*V, where rho is the density and V is velocity. At the walls, the no-slip condition forces the velocity to zero, but if I plot the contours of dynamic... |

## POLYFLOW - need of a viscosity ratio of 1/9 in viscoelastic flow simulation |

Should one always select a viscosity ratio of 1/9 for a viscoelastic fluid model?<br>Actually, it is not always necessary. A bit of historical and rheological background may help for... |

## POLYFLOW - Divergence of the solver when using the MST technique on a closed domain |

A mixing flow is considered in a closed domain (no entry or exit of material, and normal velocity imposed on all boundaries). A simulation is defined using the MST technique. The solver diverges... |

## FLUENT 6 - Including the hydrostatic (gravity) contribution to static pressure |

The hydrostatic (gravity) contribution does not appear in the static pressure display. This is due to the re-definition of pressure in the momentum equations:<br><br><a... |

## POLYFLOW - How to identify the several components of a tensor ? |

What is a tensor?<br>What is the meaning of the component Tij of a stress tensor?<br>What is an invariant of a tensor?<br>How many components does a tensor have?<br>What is... |

## POLYFLOW - where does one find the examples for POLYSTAT? |

The POLYSTAT manual mentions six examples. Where are they located?<br><br>They can be found in the examples manual. As indicated in the table of contents of the POLYSTAT manual,... |

## POLYFLOW - How to define a mixing task when adaptive meshing is used? |

When adaptive meshing is invoked for a simulation involving a MST, it is not possible to define a mixing task. Indeed, under those circumstances, the mesh becomes non-conformal, while the... |

## How does FLUENT calculate the enthalpies in reacting flows reported in the Report/Fluxes panel? |

How does FLUENT calculate the enthalpies reported in the Report/Fluxes panel?<br><br>1. For non-reacting flows, enthalpy calculation at any boundary is straight forward. Assuming... |

## POLYMAN - on Windows32/64: "ERROR: can not open file" when converting a GAMBIT neutral file via the toolbar POLYMAN (convert a gambit neutral file) |

A neutral file is created with GAMBIT under the POLYMAN environment. When asking its conversion into POLYFLOW format via the toolbar, a non-graphic version of POLYDATA is opened, and which waits... |

## POLYFLOW - Generalised Newtonian fluid model with increasing elongational viscosity? |

The literature reports the existence of generalised Newtonian fluid models where the viscosity law exhibits some level of strain hardening. Is this available in POLYFLOW, and how?<br>Via... |

## GAMBIT - Error when starting GAMBIT from POLYMAN: "Error program not found, check config file or variable POLFLOW" |

On Windows64, when starting GAMBIT from POLYMAN, the system replies with "Error program not found, check config file or variable POLYFLOW"<br>For Gambit 2.2, download and unzip... |

## Windows Remote Desktop Connection and FLUENT Graphics Issues |

Remote Desktop Connection and FLUENT Graphics Issues<br><br>Microsoft's built-in Remote Desktop Connection can be used to log in to a cluster or a server to run FLUENT. However,... |

## How to write pressure/temperature value along the streamlines |

For a 2D axi-symmetrical problem, is there a way to plot the pressure gradient along the stream line?<br><br>I recently ran a simulation for a 2D axi-symmetrical problem. The... |

## Program not Found. Check your configuration file or the environment variable for Polyflow |

This error message: "Program not Found. Check your configuration file or the environment variable for Polyflow" occurs on Windows 64-bit systems running Polyflow 64-bit when trying... |

## POLYFLOW - Error in stack storage allocation package; error in DPGETB; error messages: "Malloc failed", "not enough swap space". |

Error detected in stack storage allocation package (actual numbers may differ)<br>Current static allocation : 0.844E-02 Mbytes<br>Current dynamic allocation : 0.109E+04... |

## POLYFLOW - error message: ERROR in SOLVER section 38 in inodm, Overflow : invalid elem ! |

A calculation stops with the error message "ERROR in SOLVER section 38 in inodm, Overflow : invalid elem !" at the end of an evolution step. What is happening?<br>When this... |

## FLUENT6: How to plot the velocity vectors inside one particular phase in VOF simulation? |

<br>While displaying the velocity vectors it displays the velocity vector for all phases. Is it possible to show the velocity vectors inside only one phase at a... |

## Notes on the calculation of the center of pressure |

Some questions have recently arisen about how the center of pressure is derived in 2-D and 3-D (center of pressure calculation is new in version 6.3).<br>A short technical note was written... |

## POLYFLOW - improving the stability of the solver for transient calculations, possibly with contact or with viscoelasticity |

Some transient calculations involving contact may fail at the contact, while some transient calculations involving viscoelasticity may fail at early steps. What can be done for possibly improving... |

## The application failed to initialize properly (0xc0150002). Click on OK to terminate the application. |

FLUENT 6.3.26 64-bit requires the Microsoft .NET Framework 2.0 libraries. FLUENT will not launch without this. The error shown is:<br><br>"The application failed to initialize... |