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# Getting cylindrical co-ordinates for vertices

Some times it is useful to have the location of vertices in a cylindrical co-ordinate system. But in Gambit the vertices<br>position is given in Cartesian co-ordinate...

# copying multiple meshed volumes with connected geometry

Users frequently want to copy multiple connected volumes which are meshed. But the copying operation disconnects the volumes.<br>Following operations can do the trick:<br><br>1....

# Obtain particles' mean diameters at each cell in a spray simulation

In spray simulations, users often want to obtain the particles size distribution. For example, a contour plot of D32 (Sauter Mean diameter) over a plane would be very helpful in understanding the...

# How to handle a moving porous medium?

Moving porous media appears in many industrial applications. Since they are moving, they will induce the surrounding fluid to flow with them, at the same time, since they are porous, fluid can...

# How to create a helical pipe/coil in Gambit?

Helical coil is often used in mixing tanks or other applications. How to quickly create such structure in Gambit is a frequently asked question.<br><br>Attached file is a journal file,...

# How to deselect a reference zone once it is selected?

When a case is newly setup, if one looks under Report->Reference Values<br>the field for Reference Zone is blank, i.e. no reference zone is selected.<br>However, after selecting...

# Vendor Daemon Too Old

This error message indicates that the license server has not been upgraded with the FLEXlm version that is required to run the latest versions of FLUENT software.<br><br><br>With...

License status has been suppressed with the release of Fluent 6.1.22 and Gambit 2.1.6. The previsous releases showed license checkout status when you started Fluent.<br>WINDOWS OPERATING...

# How to separate a cell zone into two parts with an arbitrarily oriented plane

Sometimes it is necessary in Fluent to separate a cell zone into two cell zones<br>by splitting it with an arbitrarily oriented plane (i.e. a plane that is not<br>parallel or...

# How to change gravity vector as a function of time?

In some cases (e.g. fuel tank sloshing) one might need to change the<br>gravity vector as a function of time. Furthermore, one might want to provide<br>the time variation of the...

# creating an annular region for patching

user wanted to patch temperature in an annular region but did not know how to create an annular region using Adapt-Region panel.<br>Bring up Region Adaption panel by clicking Adapt ->...

# Cases with Porous Zones & Energy equation yield unreasonable temperature distribution

Users have reported unreasonable temperature distributions in cases where<br><br>-porous fluid zones are present<br>-heat exchanger model is used<br><br>The symptoms...

# Slow when reading a case file in FLUENT parallel

Reading a case file using Fluent parallel is unusually slow.<br>Some questions to consider:<br>Is the computer that you are starting FLUENT Parallel on a network?<br>Does the...

# How to compute Residence Time Distribution (RTD) for stirred tanks with inlet and outlet?

Often, Chemical Engineers need to compute the RTD of their Continous stirred tank reactors (CSTRs). FLUENT's DPM model is challenging to use in these systems due to difficulty in getting...

# TUI reports mas-flow value and surface integrals only in SI units

In the current version of Fluent (Fluent 6.1.22) the values of Surface integrals and mass-flow rate are reported in SI units only for TUI<br>command while for GUI they are reported in the...

# 'BLOCS 20' setting in polyman has no effect on polyflow run

In V3.10.0, the default is 'BLOCS 60' for Windows and Linux because the Intel processor performs better with larger blocks in BLAS3. If the user sets 'BLOCS 20' in...

# Flowtime tends to "wander" in an transient ensight .encas file

<br>While exporting data in transient ensignt format from a fluent simulation<br>one might sometimes observe that the flowtime recorded in the .encas file<br>increases and...

# inverted volumes in thin annular space

user got message about inverted volumes and high skewness while meshing a cylindrical looking volume using cooper scheme. The cooper direction was radially inwards. He did not want to decompose...

# Exporting droplet/particle statistics within the domain

Currently, there is no simple way of determining important spray statistics such as mass flux, size distributions, characteristic sizes (e.g., Sauter Mean Diameter), or size/velocity correlations....

# Fieldview export causes FIDAP to crash

The Fieldview export may cause FiDAP to crash if inactive entities are present in the geometry. The most common case is when NOMOMENTUM is present in the PROBLEM command and there are SLIP...

# MixSim 2.0: Improved "Custom by ACIS file" impeller object

The "Custom by ACIS file" impeller object in MixSim has some limitations:<br>- NO preview graphics<br>- Meshing may create millions of cells when the geometry contains a...

# Fixing corrupt ACIS geometry using a parasolid file

Occasionally, GAMBIT users who generate ACIS geometry using the tools available within GAMBIT find that the geometry has become corrupt. This is indicated, for example, by a volume split which...

# How to compute view factors between two surfaces

Given a geometry, how do I compute the view factors without using DO model?<br><br>For a given geometry, suppose, we have Surfaces 1, 2, ...<br><br>We want the view factor...

# POLYFLOW - Flow case with full slipping and inflow (constant normal force) may fail

When defining a flow case (extrusion or not) with inflow calculation based on constant normal force and invlving full slipping, the calculation may diverge.<br>This may also happen with...

# POLYFLOW-3D-Co-extrusion case

How do I improve solution convergence with a 3D coextrusion problem in Polyflow?<br>To get better convergence, you should apply an evolution on the free surface and on slip coefficent ( k) ...