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# How can I calculate the quantity known as "epsilon," which is described as the ratio of the work done by the residual load vector and the work done by externally applied forces? It is calculated as dP = Ku-P epsilon = (uT*dP)/(uT*P)

This can be done using APDL Math in ANSYS v13 with the following APDL:<br><br><br>*SMAT,k,D,IMPORT,FULL,file.full,STIFF ! stiffness, BCS ordering<br>*VEC...

# On an asymmetric contact (2D) using the fluid pressure penetration the pressure snaps throught the contacting area (only on the target side). Is this a bug?

This was a code defect that has been corrected for the 13.0 release.

# How does the reaction-force RPSD (POST26) relate to the 1-sigma reaction force (POST1)?

The reaction force RPSD is the response, in force^2/Hz units, over the frequency range, so if you integrate and take the square root, you should get the same as 1-sigma reactions. Attached is an...

# Can I use JScript to loop over all of the connections and write out the named selection to which it is scoped?

Yes, some modification may be necessary, but please try something like the following:<br><br>/*<br> * Write Contact Region Information<br> *<br> * Aaron C...

# In Workbench Simulation, results can be exported to image files one at a time. How can I create and save a batch of PNG images, one for each result in the Solution branch?

Please try the attached script (JScript). To run it, choose "Tools" > "Run Macro".<br><br>It should run through each result item in the tree, and...

# How can I use Python and JScript to automate the task of opening Workbench, attaching geometry, opening the file in Mechanical, and writing out an input file with the default mesh?

Please see the attached archive. The path has been hardcoded for now, so drop these three files in C:scratch (or somewhere else, but you have to update the script accordingly), remove the...

# How can I collect ANSYS 12.x licensing-related diagnostic log files on my Windows computer to attach to my Service Request?

Double-click this file on the client machine and on the license server if applicable. It will output necessary information for troubleshooting purposes to a folder called ansys_debug_files on the...

# How can I collect ANSYS 12.x licensing-related diagnostic log files on my linux/unix computer to attach to my Service Request?

Download the attached script file ansys_debug.sh<br><br>In a terminal window type:<br><br>./ansys_debug.sh /usr/ansys_inc/ if the installation has been done in the...

# KNOWN ISSUE: Position of Source Points may be shown incorrectly in parallel (Class 3 Error)

SYMPTOM:<br>When a case with a Source Point is run, then the CFX-Solver puts diagnostic information into the output file, showing information about the element which was used for the Source...

# Is there a way to create monitor points in the point's directory of an Icepak model by adding lines to the problem file?

1. Open the model in Icepak<br>2. Create a single monitor point (let¿s call it mon1)<br>3. Close the Icepak model<br>4. Open the file named ¿problem¿ in the...

# How can I perform a calculation involving a variable, ie: Temperature, from 2 separate runs on the same geometry? Case comparison performs only differences between variables.

CFD Post Case Comparison currently pools variables from 2 cases under one unique variable name. The only way to distinguish them in this mode is to filter with functions and locators, ie:...

# How do I optimize a junction based on the network junction temperature?

You can use the pre-defined object of maximum temperature for the network object to run the optimizer to achieve the junction temperature optimization.<br>Here is the method which you can do...

# In Icepak, how do I import boundary conditions (e.g. Power, External heat transfer coefficient, Material) using a CSV file?

Step 1: Locating the variable name for the parameter to be imported. (If you already know the variable name, you can skip this step).<br><br>a. Select an object in the Icepak model...

# How do I simplify populated areas in Cabinet into Flow resistances

Icepak has a flow resistance object that can be used to simulate a populated electronics region. Here is the method that can be used to do that. The aim of this process is to create pressure loss...

# I want to incorporate 1-D fluid flow advection links in my domain. I do not want to solve for flow. How is this possible?

You can use Network objects for this. Network objects create thermal network which can be used in this scenario. Use the following steps<br><br>1. Turn the Cabinet to...

# I am trying to run a transient solution using restart from a Steady state solution. However if I fail a fan I get an error in fluent solve?

Failing a fan turns a fan into a grille. This makes changes in the zones created by Icepak to be run in fluent. This is the reason for the error. The solution is to turn off ¿Merge Zones...

# I have a detailed ball grid modeled in my domain I want to use discrete ordinates radiation model but I don't want all the ball objects to be included in the radiation calculations or convectional calculation between the balls gaps.

You cannot unselect object from the discrete ordinate radiation model. You can however, encase them into a solid block with the material property of ¿air-solid¿. This will make no...

# Given a model with a load that is changing the contact area during the simulation, how do you calculate the contact area?

The attached workbench archive file shows how to do this.

# How to create post processing monitor points at a particular location

To create a post processing monitor point at a location, you need to know the coordinates of the location. Use View > location and click on the location. You will get the coordinates of the...

# How to create additional thermal resistance normal to source terms

You can create additional thermal resistance normal to source term using the following method<br>1. Create a dummy solid block adjacent to the source of the same size of the block and a...

# How to replace compact pcb by a solid block

A compact PCB can be replaced with a block by using orthotropic conductivity.<br>1. Create the compact pcb as needed.<br>2. Get the values of Kp (Effective conductivity (inplane) and...

# Is there a way to change the default folder Icepak looks in when opening an existing project?

Create an environmental variable called ICEPAK_JOB_DIRECTORY using the following steps<br> 1. Right click My Computer, and then click Properties.<br> 2. Click the Advanced...

# Is there a way to change the default folder Icepak looks in when unpacking a packed (tzr) file?

Open the Icepak batch file located in the Icepak installation directory.<br>Add the path in the line just below the last line in the batch file. In the example below ¿C:models¿...

# Is there a way to create different images.ppm for each of the versions in a project and then be able to see them in preview window when you use File open.

1. Open the version you want to save using Post > Load solution ID.<br>2. Please orient the graphical image as you want in the snapshot.<br>3. Use "File > Save...

# KNOWN ISSUE: Transient MFX cases with multiple stagger iterations per timestep may give incorrect results (Class 3 Error)

SYMPTOM:<br>An MFX (2-way FSI) case with multiple stagger iterations per timestep may give incorrect results. The results are expected to be only slightly wrong in many...