Cradle CFD 2024.1 (x64)

File Size: 4.4 GB

Cradle CFD is a series of practical, state-of-the-art CFD simulation and visualization software. Embracing remarkable processing speed, refined technology, and proven practicality verified by high user satisfaction, it has been in use for diverse applications, such as Automotive, Aerospace, Electronics, Building and Architecture, Civil Engineering, Fans, Machinery, and Marine developments, to solve thermal and fluid problems.

Cradle CFD includes modules

scFLOW
scSTREAM & Heat Designer
SC/Tetra
scPOST
CADthru

scFLOW
scFLOW - application for mathematical modeling of fluid dynamics and heat transfer problems with adaptive mesh and high computing speed
Features and functions specific to scFLOW
Simplification of preprocessor operations
The necessary operations with data from the CAD system for mesh analysis have been significantly simplified compared to previous versions. Saving assembly information and setting up part parameters create the impression of continuity in work between systems and reduce the user load.
Adaptive mesh
The function of local coarsening/refining of elements during automatic mesh generation has been improved. The adaptive mesh is generated from elements with the most suitable size for a specific geometry.
View mode
Data from the preprocessor can be displayed in the view mode when the license is occupied by the postprocessor or mesh generation.
Operation logging via the VB interface
Operations from the preprocessor can be saved as a log file using the Visual Basic interface. This does not provide the ability to create custom scripts, but allows you to create an automated system in a short period of time based on the operations saved in the log.
Accelerated Steady-State Analysis
Optimizations to the calculation algorithm have improved the performance of the convergence function and reduced the calculation cycle time for steady-state calculations.
Calculation stabilization
For a mesh of low-quality elements, calculations can be automatically stabilized to prevent divergence.
Scripting
Previously, complex settings (material properties or boundary conditions dependent on time or coordinates) required creating code in C and then compiling. With scripting, compilation is not required, and the functions themselves can be written in the JavaScript preprocessor.
Moving elements (discrete mesh)
Perform calculations for moving objects: rotating fan, cars moving close to each other. The accuracy of the calculation of element connections has been improved by revising the algorithm. For the parallel solver, memory efficiency has been improved, which should have a significant effect on multi-core calculations when working with large problems.
Free surface
The software calculates the shape of the contact surface between a gaseous and a liquid substance. This function can be used together with such functions as boundary moving, grid overlapping, elementary particle tracking. In case of phase surface stabilization, it is possible to perform a stationary analysis, which gives the result in a shorter time.

scSTREAM & Heat Designer
scSTREAM - application for mathematical modeling of fluid dynamics and heat transfer problems with a structured grid
Calculation models in scSTREAM are based on a simple and easy-to-build structured grid. A grid of this type consists of many small cuboids, so it approximates curved surfaces only in a stepped structure.
This type of grid is used in cases where curved surfaces or small details do not have a significant effect on the overall result. Examples of using a structured grid are found in modeling electronics cooling, heating, ventilation and air conditioning, as well as in the design of architectural structures.
Features, functions and tasks specific to scSTREAM
Various methods of representing geometry
The shape of the model to be analyzed can be represented using the following methods
- voxel method (inclined and curved surfaces are represented in cuboids);
- beveled cell method (refinement of a model created using a CAD system);
- finite element method (an arbitrary-shaped model with an unstructured grid can be superimposed on a model with a structured grid, which allows using the model from the CAD system in its original form).
Simulation of object motion
The scSTREAM system allows calculating the flow created by an absolutely rigid moving object. Such parameters as object motion (displacement, rotation, elastic deformations), heat generation/absorption, air supply/exhaust can be set as conditions. Another grid is created for the model of the moving object. With this approach, such conditions as the distance traveled by the object are practically unlimited, and this allows creating models of arbitrary complexity.
Scaling of boundary conditions
If the target phenomenon under study has a size an order of magnitude smaller than the size of the environment that influences it, the results of the environmental analysis can be used as boundary conditions in order to reduce the time and number of calculations.
Free surface
The software calculates the shape of the contact surface between a gaseous and a liquid substance. This function is useful in a wide range of areas: from tsunami analysis in civil engineering and construction to soldering analysis in electronics.
Calculation of highly complex models
With a structured grid, a complex model requires almost no adjustment, since the shape and size of the model elements do not affect the complexity of mesh generation. In addition, with parallel calculations, the calculation is performed at high speed. This ensures the efficiency of data processing.
Local Mesh Refinement
Mesh refinement can be performed locally to more accurately represent the model shape and perform calculations efficiently.
Create User Variables and Scripts
Complex conditions containing trigonometric functions or branches with IF operators can be defined without compilation.
Electronic Component Library
Geometry and properties of frequently used parts can be saved to a library for future reuse, saving time when creating a calculation model.
Thermal Path Display (HeatPathView)
Information about the temperature of each part and the total amount of heat released obtained during post-processing of CFD analysis results is not enough to understand the thermal path. HeatPathView displays the thermal path and the amount of heat transferred in the entire computational domain using diagrams, graphs, and tables, making it easy to find bottlenecks.
Import Data from Electronic CAD Systems
This function allows you to read and import data on the PCB wiring diagram from a CAD system. This allows you to get a more realistic simulation result taking into account heat transfer caused by an uneven wiring diagram.
HeatDesigner module (included in the scSTREAM distribution) is designed to perform thermal calculations of electronic components
HeatDesigner is a specialized solution based on scSTREAM, which is developed for thermal calculations of electronics. HeatDesigner performance is optimized for cases where precise reproduction of curvilinear geometry is not required to predict the flow field. However, HeatDesigner supports a mesh consisting of more than one hundred million elements, which allows for a fairly accurate description of small geometric elements. As in the case of scSTREAM, the main advantages of HeatDesigner are short calculation times and low consumption of computing resources.
Features, functions, and tasks specific to HeatDesigner
Calculation of highly complex models
With a structured mesh, a complex model practically does not need to be adjusted, since the shape and size of the model elements do not affect the complexity of mesh generation. In addition, with parallel calculations, the calculation is performed at high speed. This ensures the efficiency of data processing.
Local mesh refinement
Mesh refinement can be performed locally for a more accurate representation of the model shape and efficient calculation.
Creating user variables and scripts
Complex conditions containing trigonometric functions or branches with IF operator can be defined without compilation.
Electronic Components Library
The geometry and properties of frequently used parts can be saved to a library for future reuse, saving time when creating a calculation model.
Display of the thermal trajectory (HeatPathView)
Information about the temperature of each part and the total amount of heat released during post-processing of CFD analysis results is not enough to understand the thermal trajectory. HeatPathView displays the thermal trajectory and the amount of heat transferred throughout the computational domain using diagrams, graphs and tables, making it easy to find bottlenecks.
Import data from CAD systems
This function allows you to read and import data about the circuit board wiring diagram from a CAD system. This allows you to get a more realistic simulation result taking into account heat transfer caused by an uneven wiring diagram.
Examples of tasks to be solved
Modeling of boiling, condensation formation
Illumination analysis
Modeling of solar radiation
Air humidity analysis (condensation and evaporation processes)
Modeling of vegetation (wind, evaporative cooling)
Modeling of wind loads
Assessing the influence of the electrostatic field
Modeling of filling with foaming resin
Modeling of solidification/melting processes
Modeling of Joule heat
Tracking of elementary particles (behavior, reactions, interactions)

SC/Tetra
scTETRA - application for mathematical modeling of fluid dynamics and heat transfer problems with an unstructured mesh
scTETRA uses a hybrid mesh that allows representing the geometric features of the model with high accuracy. A fast mesh generator, high-speed calculations, low memory consumption and a user-friendly interface allow you to work efficiently and get results in a short time.
The hybrid (or unstructured) mesh is generated using tetrahedral, pentahedral, hexahedral and other polyhedral elements. This mesh is used in problems where an accurate representation of the geometry is critical. Examples of such problems are modeling the aerodynamics of vehicles, flow in pipelines, and the operation of turbomachines.
Features, functions and tasks specific to scTETRA
High-speed automatic mesh generation
A high-quality mesh is automatically created in minimal time using the exhaustion method (Advancing Front). When creating a layer of prismatic elements, its width can be set depending on the width of the flow channel. The software enables the acceleration of mesh generation by using parallel computing and supports the creation of large mesh sizes.
Adaptive Mesh
For steady-state analysis, this function will automatically reduce the mesh element size in the region where there is a significant change in flow or pressure. After the solver has completed the calculations, the preprocessor will run automatically and rebuild the mesh based on the calculation results. This function is suitable for analyzing flows in complex pipe shapes.
Modifying the CAD Model
In scTETRA, you can edit the models obtained from the CAD system as needed or if errors occur. Boundary conditions can be set based on part names and other parameters imported from the CAD system. If any regions required for the analysis are missing in the imported model, they can be represented by shapes such as cuboid and cylinder.
Free Surface
The software calculates the shape of the contact surface between a gas and a liquid substance. This function can be used in combination with functions such as moving boundaries, overlapping meshes, and particle tracking. Examples of application - analysis of the influence of waves on a ship, analysis of the influence of shaking on a gas tank, etc.
Dynamic function
Allows you to analyze the forced movement and rotation of an absolutely rigid object under the influence of a hydrodynamic force.
Discrete grid
This technology of working with a grid allows you to
- simulate flows generated by moving objects: rotating fans and turbines, moving cars or trains;
- analyze heating taking into account the shear between the rotor and the hub in a disc brake system;
- analyze a combination of rotation and translation (e.g. a piston pump).
Mesh Overlap
Motion that is not reproduced by deformation or rotation is simulated using an overlapping mesh for the moving and stationary domain. In addition, object contact and overlapping of multiple domains are supported. An example of an application for this function is the analysis of the opening and closing of an engine piston valve or a gear pump operating through gears.
Strength Analysis Module
Deformations and thermal stresses can be calculated based on the calculated pressure and temperature values. An interface with Abaqus has been implemented for solving fluid-structure interaction problems.
Compressible Fluid Simulation
scTETRA enables the analysis of supersonic flow phenomena and large volume expansion/compression. For compressible fluids, both pressure-based and density-based solvers are used. The solver type depends on the purpose of the analysis and the type of phenomenon.
Examples of tasks solved
Boiling simulation
Cavitation simulation
Fan simulation (model creation, shape analysis)
Aerodynamic noise analysis
Solidification/melting process
simulation Dispersed multiphase flow simulation
Elementary particle tracking (behavior, reactions, interaction)
Condensate amount calculation
Liquid film simulation (advanced particle tracking function)
Pressure loss simulation
Thermal control simulation
Turbulent flow simulation
Radiation simulation
Fan simulation without creating a geometric model
Joule heat simulation
Plain bearing designer

scPOST
scPOST - postprocessor for visualization of calculation data performed by both Cradle-cfd solvers and other solvers
Available import formats: MSC Nastran, MSC Marc, images (BMP, PNG), 3D geometry (STL, Parasolid)
Available export formats: Generic format for fluid data (.cgns), images (BMP, JPG, PNG), animation (AVI, WMV), 3D geometry (STL, VRLM, FBX)

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