Simcenter FLOEFD 2021.2.1: What’s New?

By Boris Marovic
New Simcenter EV module for Electric Vehicle applications in Simcenter FLOEFD CAD Embeded CFD software.
New Simcenter EV module for Electric Vehicle applications.

The latest release of CAD-embedded Simcenter FLOEFD 2021.2.1 has just been released. Simcenter FLOEFD is a CAD-embedded computational fluid dynamics (CFD) solution and supports NX, Solid Edge, CATIA V5 and Creo. Due to its unique technology, it can reduce the overall simulation time by up to 75%. The new capabilities featured in this version are 1D Elements and a new Simcenter FLOEFD EV module. Let’s take a look at the new functionalities available in the latest release:

1D Elements speed up 3D CFD simulation

The 1D Elements increase the simulation speed and reduce mesh requirements using 1D Elements within a 3D Simulation. Users can automatically convert a pipe into a chain of 1D Elements and solve their fluid and thermal interactions using 1D CFD embedded in Simcenter FLOEFD, allowing the user to run simulations faster without compromising on accuracy. A dedicated 1D Elements GUI gives users the opportunity to define boundary conditions based upon geometry that is not present in the 3D Model providing accurate boundaries to a CFD simulation.
The 1D Element system is therefore used to run the simulation inside the pipes with a 3D simulation run on the outside of the pipes. The 2D faces between the 1D system and the 3D simulation are the boundaries between the two simulations, taking into account the heat transfer between the 1D and 3D simulations solved in one simulation.
The 1D Elements are based on Simcenter Flomaster technology.

1D Elements and 3D CFD simulation method combined in one simulation in Simcenter FLOEFD software, CAD Embedded CFD
1D Elements and 3D CFD simulation method combined in one simulation.

There are two ways to create a 1D chain: manual and automatic recognition from CAD geometry. In the manual approach you choose the elements of the chain one by one, adjust their parameters and select the reference face in CAD to define the start of the chain.

1D Elements in 3D CFD - in Simcenter FLOEFD compuational fluid dynamics software
1D elements chain manual creation in Simcenter FLOEFD 2021.2.1

For a watertight pipe you can automatically create 1D Elements. The fluid volume of the pipe is identified from which a centerline is extracted and an equivalent chain of 1D Elements is created whose length, diameter, bend radius etc. is automatically defined. If there is heat transfer defined in the Simcenter FLOEFD project, then the internal faces touching the fluid volume will be automatically set as the heat transfer faces for an internal heat transfer connection. View this demonstration video below for how to automatically create a chain of 1D Elements.

Video demonstrating automatic generation of 1D Elements from CAD for use within a full 3D CFD simulation

New Simcenter FLOEFD EV module

The new Simcenter FLOEFD EV module (EV = Electric Vehicle) comprises various capabilities crucial for comprehensive multiphysics (thermal-electrical-electromagnetics-structural) analysis of e-Powertrain and its components such as batteries, inverters, DC Links, IGBTs, MOSFETs, Busbars and ECUs. The capabilities include Electro-ChemicalThermal Model (ECTM) and Equivalent Circuit Model (ECM) battery models, Joule heating, Membrane, Electrical Element, Electromagnetics, Structural, SmartPCB, Two resistor, Network assembly (DELPHI model), PCB and Heatpipe compact models.

The Simcenter FLOEFD EV module is therefore a module bundle consisting of the Electronics Cooling, Power Electrification, EMAG and Structural module and also got the SmartPCB and Network Assembly feature added to it.
To access this functionality, you will need the “Simcenter FLOEFD EV” module license.

New CAD System Support

Support of Siemens NX series 1984.

For additional information and a complete list of new capabilities of Simcenter FLOEFD 2021.2.1, please go to the Support Center site ( or read the release highlights file provided with the installation package.

This article first appeared on the Siemens Digital Industries Software blog at