Home
Feko Application Macros
A large collection of application macros are available for CADFEKO and POSTFEKO.
Shared Application Macros
A collection of Lua macros are available to automate repetitive tasks where the workflow span both CADFEKO and POSTFEKO.
Farm Model to a Cluster Macro
This application macro is used to divide a larger model with many frequency points, and plane wave sources requested in multiple directions into sub-problems with smaller chunked frequencies and incident directions. The sub-problems are executed concurrently on a cluster reducing the run time to solve the larger problem.
Submitting Jobs to the Cluster
Execute the Farm model to cluster application macro in CADFEKO to split a model into smaller runs with one frequency and angles of incidence (phi and theta) to a cluster.

Welcome
Release Notes
See what's new in the latest release.
Get Started
The Feko Getting Started Guide contains step-by-step instructions on how to get started with Feko.
Examples
The Feko Example Guide contains a collection of examples that teaches you Feko concepts and essentials.
Introduction to Feko
Feko is a comprehensive electromagnetic solver with multiple solution methods that is used for electromagnetic field analyses involving 3D objects of arbitrary shapes.
CADFEKO
CADFEKO is used to create and mesh the geometry or model mesh, specify the solution settings and calculation requests in a graphical environment.
POSTFEKO
POSTFEKO, the Feko post processor, is used to display the model (configuration and mesh), results on graphs and 3D views.
EDITFEKO
EDITFEKO is used to construct advanced models (both the geometry and solution requirements) using a high-level scripting language which includes loops and conditional statements.
Feko Solution Methods
One of the key features in Feko is that it includes a broad set of unique and hybridised solution methods. Effective use of Feko features requires an understanding of the available methods.
Optimisation in Feko
Feko offers state-of-the-art optimisation engines based on generic algorithm (GA) and other methods, which can be used to automatically optimise the design and determine the optimum solution.
Feko Utilities
The Feko utilities consist of PREFEKO, OPTFEKO, ADAPTFEKO, the Launcher utility, Updater and the crash reporter.
Description of the Output File of Feko
Feko writes all the results to an ASCII output file .out as well as a binary output file .bof for usage by POSTFEKO. Use the .out file to obtain additional information about the solution.
Feko Application Macros
A large collection of application macros are available for CADFEKO and POSTFEKO.
- Application Macros
  An application macro is a reference to an automation script, an icon file and associated metadata.
- Application Macro Library
  The application macro library allows commonly used application macros to be stored in a repository.
- CADFEKO Application Macros
  A collection of Lua application macros are available to automate repetitive tasks in CADFEKO.
- POSTFEKO Application Macros
  A collection of Lua application macros are available to automate repetitive tasks in POSTFEKO.
- Shared Application Macros
  A collection of Lua macros are available to automate repetitive tasks where the workflow span both CADFEKO and POSTFEKO.
  - Convert Between Loss Tangent and Conductivity
    It is possible to convert between the loss tangent and conductivity description of the material losses at a single frequency. This application macro performs the calculation and can be used in CADFEKO and POSTFEKO.
  - Farm Model to a Cluster Macro
    This application macro is used to divide a larger model with many frequency points, and plane wave sources requested in multiple directions into sub-problems with smaller chunked frequencies and incident directions. The sub-problems are executed concurrently on a cluster reducing the run time to solve the larger problem.
    - Overview
      The application macro is divided into two parts. The first part in CADFEKO creates the models to submit to a cluster. The second part in POSTFEKO merges the results.
    - Setting up an RCS Sweep Configuration
      Set up an RCS sweep configuration. The farm_model_to_cluster.lua uses the frequency and incident angle information from plane wave sources in the model to create the sweep.
    - Setting up the PBS Job Template File
      The job template file contains a set of instructions for the PBS cluster. This list of commands is used for each sweep configuration when submitting the runs to the cluster.
    - Submitting Jobs to the Cluster
      Execute the Farm model to cluster application macro in CADFEKO to split a model into smaller runs with one frequency and angles of incidence (phi and theta) to a cluster.
    - Merging the Results Using the GUI
      Execute the combine_results.lua in POSTFEKO to merge the results completed from the cluster run.
    - Merging the Results on the Cluster
      Execute the combine_results.lua from the command line using POSTFEKO to merge the results on a cluster. Use the --configure-script argument to pass configuration information to the combine_results.lua script.
    - Macro Limitations
      The farming application macro has limitations on sweep combinations that can be requested for frequency and angle sweeps.
  - Other Shared Application Macros
    A collection of smaller shared application macros are available, but these macros do not include step-by-step instructions.
Scripts and Application Programming Interface (API)
CADFEKO and POSTFEKO have a powerful, fast, lightweight scripting language integrated into the application allowing you to create models, get hold of simulation results and model configuration information as well as manipulation of data and automate repetitive tasks.
Appendix
Reference information is provided in the appendix.

Submitting Jobs to the Cluster

Execute the Farm model to cluster application macro in CADFEKO to split a model into smaller runs with one frequency and angles of incidence (phi and theta) to a cluster.

Open CADFEKO and run the Farm model to cluster macro.
The Farm model to cluster dialog is shown.
Figure 1. The Farm model to cluster dialog.
Click Browse to select the output directory.
[Optional] Select the Don't remesh if not needed check box to only mesh the model when required.
[Optional] Select the Don't save *.cfx/*.cfm files if mesh did not change check box to preserve disk space and only create the files that are required.
In the Number of chunks field, enter the number of chunks to farm to a cluster.
Click View/Update info to display additional information about the sub-models.

Note: If a plane wave source is included in the configuration only the incident directions are chunked and a single frequency is used per sub-model to optimise the run time.
Click Submit to start splitting the models to submit the to the cluster.
Once the model creation has started, a progress dialog is shown.
Figure 2. The Farm model to cluster progress dialog.
Complete the process by clicking OK to acknowledge the messages.
- The process is finished. The individual models are available in the configuration subfolder in the output directory. A submission file for each sweep configuration is available in the output directory.
Once the models are submitted to the cluster, the following dialog is shown.

Figure 3. The Farming model to cluster completion dialog.