Results analysis - Recent Threads

How to model chiller part-load in CFD with hot standby units?

AK202512115130 — Sat, 13 Dec 2025 15:13:35 GMT

Hi everyone, I’m using Cadence Reality DC Advanced to simulate an air-cooled chiller plant. The building load is capped at 80%, and all chillers (including standby) are running to share that load.
Questions:

Represent part-load heat rejection at condenser coils?
Model fan speed control when the software uses chilled water supply temperature as the control basis?
Any best practices for distributing load across multiple chillers in this scenario?

Looking for tips or workflows—thanks!

Developing Integrals at Rotor-Stator Interfaces: A Python API Document for Fidelity Platform

Gaurav — Tue, 07 Oct 2025 07:44:47 GMT

This script is designed to generate integral values at the critical rotor-stator (RS) interface with high efficiency. The resulting data is recorded in a CSV file, enabling easy access and in-depth analysis. The primary goal of this script is to facilitate the creation of integrals, providing users with valuable insights for their projects.

To initiate the process, execute the main script file, `Axial_Turbine_Aachen_2025.1.py`. This will create a project directory in the same location as the script file. Within this directory, a `project.fidelity` file will be generated.

To proceed, users must configure the postprocessing script file, `Post_Proc_Integral_RS_Interface.py`, by:

1. Assigning the project directory path to the `project_path` variable.
2. Designating a suitable path for storing desired integral values to the `image_path` variable.

By following these steps, users can successfully run the script file and obtain meaningful integral data:

1. Execute the main script file, `Axial_Turbine_Aachen_2025.1.py`.
2. Configure the `project_path` variable in the postprocessing script file.
3. Specify the `image_path` variable for storing integral values.
4. Run the postprocessing script file to generate integral values at the RS interface.
5. Access and analyze the resulting data in the CSV file.

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1OPP000001qiHJ2AY&pageName=ArticleContent

Transient

DC202411077358 — Tue, 23 Sep 2025 12:03:19 GMT

Parameters considered to calculate the Data Hall Transient, ACU response time and simulation time basically take into account which factors?

Creating Spanwise Visualizations with Derived Quantities using Python Scripting

Gaurav — Mon, 08 Sep 2025 14:08:34 GMT

This application note presents a step-by-step tutorial on generating a spanwise plot from derived quantities within a result analysis setup in Fidelity version 2025; it uses a script-based methodology.

This script file aims to generate a spanwise plot from derived quantities. The script is structured into three main parts to achieve this objective.

The first part details the creation of derived quantities, a crucial step that lays the groundwork for the subsequent sections.

The second part focuses on generating a spanwise plot for a specific domain using the previously created derived quantities and provides guidance on how to tailor the plot to meet specific requirements.

The final part explains the process of exporting the generated image from the Fidelity GUI, with Fidelity Python functions employed throughout to ensure smooth execution.

Creating Spanwise Visualizations with Derived Quantities using Python Scripting

A Step-By-Step Guide for Developing Blade-to-Blade (B2B) Surface Integrals in Fidelity Platform Using Python API Functions

Gaurav — Thu, 28 Aug 2025 06:41:57 GMT

We are excited to share a script-based method for efficiently generating integrals in Fidelity version 2025.1, utilizing the Axial Turbine Aachen setup as a demonstration case. This application note serves as a comprehensive guide, providing a step-by-step walkthrough for creating a custom script file tailored to your specific needs.

Primary Objective

The script's primary objective is to automate the process of generating integrals on the B2B surface at desired span locations, compute integral values, and store the results in a convenient ".csv" file format. By leveraging this automation, Fidelity users can efficiently extract multiple values at various locations, thereby significantly reducing the time and effort required for manual calculations.

Downloadable Script Files

To facilitate the implementation of this script-based approach, we are providing two downloadable script files:

1. Axial_Turbine_Aachen_2025.1.py: This primary script is responsible for running simulations.
2. Post_Proc_Integral_B2B_Surface.py: This secondary script employs Python functions to generate integrals.

These scripts can be easily integrated into your Fidelity workflow, enabling you to efficiently generate integrals and analyze results. We invite you to explore this script-based method and experience the benefits of streamlined calculations and increased productivity.

You can access the downloadable script files and explore the detailed step-by-step guide in this application note. We welcome your feedback and look forward to your participation in the discussion forum.

A Step-By-Step Guide for Developing Blade-to-Blade (B2B) Surface Integrals in Fidelity Platform Using Python API Functions

Post processing LES vs RANS

LJ202505013133 — Thu, 01 May 2025 15:07:47 GMT

Which post processing tool is recommended for comparing LES (made using CharLES), RANS and wind tunnel oil flow visualization results to each other?

Cadence Reality/ 6sigmaRoom Thermal modelling Error

Thisisthenam — Fri, 27 Dec 2024 03:05:12 GMT

Hello all, apologies if this is the wrong forum, I searched "Data Centre" and it lead here. Also apologies for occasionally using old Software names, still learning which package is now called what. If I am in the wrong area please point me to the correct forum if thats okay.

While running a Data Centre simulation I have come across the following error.

Background: I am running an updated Data Centre model, specifically I have added 8 new Air Cooling Units (ACU) to the .room model. These are as far as I can tell, identical to the existing units,.

Error: When I verify the model I get the critical error -> ThermalModellingError: More/Less flow is being supplied to the model than extracted (region number). I get multiples of this error with some saying More air some saying less air depending on the calculation region.

Tests I have done to find out more about the problem

1)Delete the new ACUs. Result: Mode now verifies fine

2)Delete 8 different ACUs and leave in the 8 new units. Result: Model throws same error as before.

3)Right Click ->Duplicate the New ACUs and delete the units I duplicated (leaving in the copies). Result: Model throws same error as before.

I also cannot seem to find any differences between these 8 ACUs and the others in the property tables for the units themselves and the Supply-Return vents.

Thanks in advance and sorry if this is in the wrong place.

Result of calculation in FineTurbo

DenysK — Sun, 23 Jul 2023 10:06:05 GMT

Dear colleagues,
I deal with 3D calculation of axial compressor in FineTurbo. I have done steady state calculation.
I have encoutered with such issue. On the stator blade, on the suction side I have zone with increased Total Pressure.
It doesn't corresponds to written in books about aerodynamics of compressor. I atteched one picture and added values of parameter in different places of section of stator blade.

Perhaps, can someone explain this result or I did something incorrectly?

Multiple Frames in Cf view

sima101f — Mon, 19 Jun 2023 10:39:18 GMT

Hello. Does some know or guide how to create multiple frames in single screen in cfview? for example i want to see my b2b surfaces in b2b view at 10%, 50% and 90% span in single a frame window. So to say three different pictures in a single picture.

Thanks in advance

Regarding the calculation of KCS resistance

Halder — Fri, 21 Apr 2023 07:24:30 GMT

I am working on the simulation of the ship modelling. I am using the FINE/Marine software for ship model calculation. Therefore, I am following the tutorial “KCS resistance calculation”. However, I have taken geometry from the FINE/Marine tutorial folder “KCS_hull_SVA_cf_withnames_cf2”. After that I used the model scale without a rudder (1:31.6). Next step I followed the same procedure as mentioned in the report. I have simulated six velocities (0.915m/s-2.379m/s) corresponding to the Froude number and compared them with the results without the rudder at velocity 2.196m/s. In my CFD results I got a Ct value of 3.44*10^3 (Fx=82.24N, wetted surface=9.9206m^2, density 999.1kg/m^3, V=2.196) while the reference Ct value is 3.551*10^3 corresponding velocity 2.196m/s). I am getting a lower Ct value as compared to the FINE/Marine CFD results. So, I am worried about getting a lower Ct value. Therefore, I am requesting you to kindly help with the calculation so I can get similar results as mentioned in the KCS resistance calculation.

The color contour is not visible

Colinda — Tue, 05 Apr 2022 15:37:13 GMT

When I try to visualize a color contour on a surface in the Results analysis, it is not visible. How to fix this?