Post-Processing and Data Export Generate meaningful graphics, animations and reports and transfer data to other applications. Multiphase Gain insight with a full range of capabilities for modeling complex flows.
Customized Tools User-defined functions, global consulting and add-on modules for special applications. Ozen Engineering Inc. To see our events schedule or register for an upcoming event, please go to our Events page. Prestigious companies in California turn to Ozen Engineering as the single-source of reliable simulation solutions. Although Ozen Engineering is headquartered in the heart of Silicon Valley, we collaborate with best-in-class companies worldwide to optimize product design performance and improve product development processes for our clients wherever they are located and across a wide variety of industries.
We are dedicated to supporting our clients. We are passionate about developing accurate simulation and realistic modeling as core competencies within client companies and helping them realize unparalleled results from their FEA, CFD and Electromagnetics investments. Ansys Fluent. On the other hand, they provide a comparable increase in accuracy for the same mesh size [ CFD forum thread ].
This seems to be something of an open question, being solved by increased total computational power rather than a really tight theoretical argument [ Venkatakrishnan ]. In some sense, FVM is more natural to implement on a unstructured mesh, and offers better stability. You can think of think of FVM as a simplified or zeroth-order FEM formulation via the divergence theorem, with element properties averaged to the cell center or vertices rather than calculated at nodes.
The accuracy is somewhat lower, but in many cases you are looking for qualitative behavior instead of quantitative precision. Finally, a strong caveat to the finite volume method: it will almost always yield a converged solution, but it is incumbent upon you to verify whether this solution is physically meaningful or accurate.
FVM also introduces more numerical diffusion than FEM typically which may require a finer mesh to alleviate. Fluid mechanics generally concerns the solution of the Navier—Stokes equations or some coherent simplification of these. These equations collectively circumscribe continuum hydrodynamics. The momentum conservation equations in cartesian form are:.
The right-hand side may be non-zero if multiple phases are involved, as this is where phase transitions express themselves mathematically. There are a number of matters of taste involved in this derivation, like the sign of the stress tensor, but generally this is the equation one needs to simplify and solve [ Wikipedia ]. FVM does very well with directly-expressed quantities such as mass and momentum preservation but not necessarily second-order properties such as vorticity or kinetic energy.
Fluent also supports compressible flow, turbulence, multiphase flow, magnetohydrodynamics, combustible flow, and other models. You can even designate whether a simulation is Eulerian or Lagrangian.
An Eulerian model involves a mesh which the fluid flows through like a pipe or mesh of control volumes. A Lagrangian model, by contrast, describes the fluid itself flowing and deforming, with no material transfer between cells [ Wikiversity ].
Turbulence manifests as a cascade of self-similar flows across many scales. Thus to resolve turbulence requires an extremely fine grid, down to the millimeter level in some cases. Thus the effect of turbulence is often "bundled" into a kinetic or dissipative energy term with its own governing equation.
Fluent is probably the best general-purpose CFD program available today. OpenFOAM and SU2 are both powerful open-source packages, but they are very demanding of the user since they essentially require you to program your governing equations directly.
Fluent tends to be good at large turbulent flows as well. Alakashi, A. Applied and Computational Mechanics 4 : Moukalled, F.
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