- Solidworks flow simulation goals manual#
- Solidworks flow simulation goals software#
- Solidworks flow simulation goals series#
Overall, fewer time steps are needed and you get the desired time results faster.” “The goal of nested iterations is to get a value at a specific time stamp, where there is no interest in intermediate values. “The problem with transient flow is that you have to follow the changing flow field,” said Derbal. Using nested iterations, SOLIDWORKS Flow Simulation can solve the same problem with larger time steps, thereby reducing overall computational time. However, if that accuracy level is good enough for your simulation, then the time savings is well worth it. Derbal noted that the new computation will not be able to capture tiny transient details in the results, so the accuracy may be reduced by a small percentage. With the nested iterations, however, much larger time steps are permissible, reducing your computational time considerably.
“A compressible gas flow in a vessel, for example, can take days to calculate.” “If the simulation requires a time step of say 0.1 milliseconds and you want to investigate a range of 5 seconds total, then you are looking at 50,000 time steps,” said Derbal. Derbal explained that simulations that traditionally need small time steps can take days or weeks to solve. Nested Iterations Reduce CFD Computations for Transient AnalysisĪ significant time saver for engineers will be the ability to use nested iterations when computing a transient analysis. This information is useful in understanding if the mesh is well suited for its purpose of capturing both the geometry and the resulting flow field. The higher the number, the more times a cell’s size has been reduced and thus finer the mesh. The plot shows how many levels of refinement a mesh cell has undergone from the initial global mesh size. This tool creates a quick reference the engineer can use to see where the mesh still needs to be refined. Each domain can be set to have either a particular cell size or cell number for local optimization of the mesh to capture all the detail of the model while still maintaining a uniform mesh around that model.Īnother added tool to SOLIDWORKS Flow Simulation is the mesh plot. To define these domains more easily, Flow Simulation 2016 allows users to directly create domains around a specific design detail without adding a geometric feature, which was previously needed. Users are able to set local mesh domains within which the mesh is optimized. This meshing ability can be used for both internal and external flows.
Solidworks flow simulation goals manual#
However, Derbal notes that “with current enhancement of the mesh, even with manual operation, you can optimize the mesh very fast … faster than the last version.”įlow Simulation also has the ability to create more uniform meshes for improved convergence and accuracy.
Typically, an automatic mesh will yield a less desirable computational model than one that is manually optimized by the user. The compromise is: do you want a quick automatic mesh, or should you spend time to optimize the size of the global mesh?” “When you have a large model, it means more CPU time. “For any simulation, the time spent on meshing is important to the user,” said Derbal.
Solidworks flow simulation goals software#
Lotfi Derbal, product portfolio manager for SOLIDWORKS Flow Simulation at Dassault Systèmes, notes that perhaps the most important improvement to the software is its meshing enhancements. Meshing Is Key to SOLIDWORKS Flow Simulation 2016
Solidworks flow simulation goals series#
However, the team at SOLIDWORKS has created a series of updates to their CFD tool, SOLIDWORKS Flow Simulation, in the 2016 release. With all of the buzz of what’s new in SOLIDWORKS 2016, and even SOLIDWORKS Simulation 2016, many engineers that specialize in computational fluid dynamics (CFD) might feel left out.
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