What's New

R2022x FD01 (FP.2205)

Temperature-Dependent Density Correction in the Incompressible Solver

When you use a fluid material with density that varies with temperature, the incompressible fluid solver now automatically accounts for the varying temperature field in the simulation.

The Density material option for materials includes a setting that lets you define a tabular set of data values to represent a material whose density varies in space.

Benefits: Incompressible flow simulations can produce more realistic results for scenarios when the fluid density is not homogenous in space.

For more information, see Density

Advanced Flow Solver Parameters for Improved Convergence

You can now specify the pressure dissipation term and the pressure gradient formulation for a flow step, which lets you fine-tune the solver behavior for greater accuracy or greater likelihood of convergence.

The pressure dissipation term provides additional stability for porous media simulations when the solver is experiencing convergence issues. Increasing the pressure dissipation can improve solution stability, and decreasing it can produce more accurate results in simulations that are not having convergence problems.

The pressure gradient formulation determines the mathematical formulation in which the app implements the pressure gradient on the momentum equation. For multiphase flow problems, using a nonconservative formulation improves the accuracy of the calculations, while a conservative formulation can help you converge on a solution. The nonconservative formulation can also produce more accurate results in simulations that exhibit large body forces or pressure discontinuities.

The new advanced flow solver parameters are available in the Expert Numerics Controls for both steady-state and transient flow steps.

Benefits: The pressure dissipation term and pressure gradient formulation provide greater control over the solver behavior, which allows you to fine-tune your simulation for greater accuracy or greater convergence.

For more information, see Defining Expert Numerics Controls

Support for Compressible Flow in Multiphase Simulations that Use the Volume of Fluid (VOF) Method

You can now run a multiphase simulation using the VOF Method that also includes compressible flow.

In this simulation configuration, you define one phase as compressible and the other phase as incompressible.

Benefits: With both compressible flow and multiple phases, you can simulate fluid flow in which one of the two phases is compressible.

For more information, see About the Volume of Fluid (VOF) Method

R2022x GA

Electrical Resistance between Solid Surfaces

You can now specify the electrical resistance between solid surfaces when the electric potential solver is active.

By enabling the electric potential solver, the app allows electrical current to flow through the solid interface. You can use this functionality, for example, to place batteries in series.

In the image below, there are two copper plates placed in contact with one another. You can specify the electrical resistance at their interface before completing the remainder of your workflow.

Benefits: The ability to specify the electrical resistance between solid surfaces supports workflows that model the electrical current flowing through solid components.

For more information, see Defining a Solid Interface

Determining the Electrical Resistance of Solid Components

You can now create history output requests to measure the area-averaged electric potential and the total average electric current across a solid component, such as a battery pack.

When you request output for your simulation, select a set of surfaces for which you want to determine the area-averaged electric potential and the total average electric current at those surfaces (AVG_ELECTRIC_POTENTIAL and AVGECUR, respectively). Similarly, request these types of output for another set of surfaces. After you run a simulation, you can use the differences between these two output requests to determine the electrical resistance across the two sets of surfaces.

Benefits: The addition of area-averaged electric potential and total average electric current history output requests allows you to determine the electrical resistance of solid components.

For more information, see CFD Output Variables

Support for New E-Cooling Components

You can override the operating parameters that you predefined for the new e-cooling components (that is, heat sinks, compact printed circuit boards, and thermoelectric coolers) now available in Fluid Model Creation.

In addition, the app allows you to add simulation data to these new e-cooling components when you override their operating parameters.

Benefits: The ability to override an e-cooling component's operating parameters allows you to reuse the component to run various simulations in Fluid Scenario Creation.

For more information, see E-Cooling

Isotropic Electrical Conductivity for Solid Components

You can now specify isotropic electrical conductivity in the material that you apply to solid components in a fluid flow simulation.

As part of this enhancement, the app now includes the Electric Conductivity material option under the Fluid Dynamics material options in the Material Definition: Simulation Domain dialog box.

Benefits: Using materials that specify electrical conductivity lets you model common workflows used in battery simulations.

For more information, see Navier-Stokes: Electric Conductivity

Orthotropic Thermal Conductivity for Cylindrical Solid Geometry

You can now simulate orthotropic thermal conductivity for solid geometry that is defined using cylindrical geometry.

The following image shows the Thermal Conductivity material options under the Fluid Dynamics material options in the Material Definition: Simulation Domain dialog box.

Benefits: You can now specify more complex thermal behavior for geometry defined using a cylindrical coordinate system.

For more information, see Conductivity

New Simulation Example: Heat Exchanger Efficiency

This example guides you through performing an analysis of a shell-and-tube heat exchanger to determine its efficiency.

You determine its efficiency by investigating the coolant fluid's pressure, temperature, and mass flow, in addition to generating streamlines contours of the flow.

Benefits: The heat exchange example provides step-by-step instructions that you can perform to learn how to create a flow simulation with thermal effects.

For more information, see Heat Exchanger Efficiency

Improved Robustness for Simulations that Include Porous Media

You can include an additional pressure dissipation term that provides extra stability and robustness in simulations that include flow through porous media.

You might want to include pressure dissipation effects for simulations where the long-term pressure might change the solution, and you might want to ignore these effects to converge on a solution more quickly.

By default, the pressure dissipation term is active on porous media zones only. You can specify the pressure dissipation term in the expert numerics controls for both steady-state steps and transient steps.

Benefits: Adding an additional pressure dissipation term can help your simulation converge on a solution when it includes flow through porous media.

For more information, see Defining Expert Numerics Controls

Improved Accuracy for Simulations with Incompressible Multiphase Flow, Multiple Reference Frames (MRF) Zones, or Body Forces

You can now specify the momentum pressure gradient formulation for a step, which controls how the simulation calculates the pressure term in the momentum equation.

The conservative formulation is suitable for most simulations where the pressure is smooth. However, you can specify a nonconservative formulation to calculate the pressure term more accurately in simulations that are driven by abrupt changes in pressure, like those with incompressible multiphase flow, MRF zones, or body forces. The momentum pressure gradient formulation is available in the expert numerics controls for both steady-state steps and transient steps.

Benefits: The momentum pressure gradient formulation provides extra control for improving the accuracy of the calculations when incompressible multiphase flow, multiple reference frames (MRF) zones, or body forces are present in the simulation.

For more information, see Defining Expert Numerics Controls

3DEXPERIENCE Native Apps Content Reference Guide

You can now find the reference information you need to use the content delivered along with your app.

You can consult the 3DEXPERIENCE Native Apps Content Reference Guide.

Benefits: The new guide provides one central location for all user assistance on the content provided with 3DEXPERIENCE roles.

For more information, see 3DEXPERIENCE Native Apps Content