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Computational fluid dynamics in filters - Essay Example

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Essentially, a CFD simulation protocol is so computationally intensive and involves such esoteric mathematical skills (because it involves the solution of non-linear partial differential equations) that individual efforts at completion of these Herculean tasks is next to impossible…
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Computational fluid dynamics in filters
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Download file to see previous pages Essentially, a CFD simulation protocol is so computationally intensive and involves such esoteric mathematical skills (because it involves the solution of non-linear partial differential equations) that individual efforts at completion of these Herculean tasks is next to impossible. So, recently many software companies have sprung up that provide requisite software tools for the same (most notably FLUENT). The operational protocol of such companies (e.g. FLUENT) is briefly outlined below.A virtual prototype of the fluid model to be examined is built within the ambit of a Computer Aided Design (CAD) package which is characterized by a unique and suitable computational mesh which in turn is created after accounting the boundary conditions and specific fluid material properties for the operation. Standard preprocessing software tools such as GAMBIT, TGrid and G/Turbo are supplied to the customers by these companies. The rest of the protocol is efficiently conveyed in the following statement in the official fluent.com home page, "CAD geometries are easily imported and adapted for CFD solutions in GAMBIT, Fluent's own preprocessor. 3D solid modelingoptions in GAMBIT allow for straightforward geometry construction as well as high quality geometry translation. Among a wide range of geometry tools, Boolean operators provide a simple way of getting from a CAD solid to a fluid domain. A state-of-the-art set of cleanup and conditioning tools prepares the model for meshing. GAMBIT's unique curvature and proximity based "size function" produces a correct and smooth CFD-type mesh throughout the model. Together with our boundary layer technology, a number of volumetric meshing schemes produce the right mesh for your application. Parametric variations are also inherent to the process." For varied computational mesh requirements, other meshing tools as ANSA, Harpoon, Sculptor and YAMS are available.
SOLVING [1]
This step involves computer simulations of real world conditions by evaluating and assessing product functional efficiency in the specified boundary conditions. Several commercially available suites of softwares, most notable of them being FLUENT, FloWizard, FIDAP, and POLYFLOW (from FLUENT Corporation) boasts of intensive and flexible parallel computing capabilities that enables faster and accurate modeling by solving flow dynamics mathematics involving Navier-Stokes and Eulerian equations. An ideal software suite should have the following attributes-
(a) An interactive platform that allows changes to be affected during analysis which saves time and enable more efficient refinement of designs thereby making the learning curve shorter and modeling process faster.
(b) Physics and interface functions should be customizable according to design requirements.
CFD FOR FILTERS 4
(c) Computational mesh capability should be dynamic and adaptive enough to be compatible with a wide range of physical prototypes which will enable modeling complex moving objects in relation to flow.
POST-PROCESSING [1]
It is the final step in CFD simulation where the data gathered in the previous computing step is harvested and analyzed in detail to provide a layman's interpretation of the same for broader comprehension and interpretation. Several layers of reporting of the same set of data can be done according to the audience, ...Download file to see next pagesRead More
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