No Meshing ! Its Meshless CFD

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23 April, 2014 Add new comment

CFD

A most common complaint often cited by computational fluid dynamics practitioners is the generation of a good quality computational mesh and is estimated to be costing about 70% of the entire simulation cycle. Though much progress has been made in terms of algorithm accuracy and speed over the last three decades, generating grids step for complex, real world computations still remains the most time consuming and least reliable component of CFD simulation process. Meshless methods thus provide a viable alternative to grid-based flow computation as they are supposed to not require the conventional grid structure and thereby relieving the many issues specifically related to grid generation step. This blog shall provide you an introduction and update about the popular meshless methods available today.

Grid Generation for CFD Analysis of Turbomachinery

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18 April, 2014 Add new comment

CFD

Though CFD has been widely used as a standard and well established engineering design analysis and optimization tool, the turbomachinery flow simulation still remains one of the challenges to handle. The typical reasons that make them so are the very complex nature of geometries and flow physics encountered in turbomachines. The following phenomena make turbomachinery flows extremely intricate and difficult to model for CFD simulation studies:

Writing a User Defined Function (UDF) for CFD Modeling : Second Edition

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17 April, 2014 Add new comment

CFD

Hello Friends, its being a long time I haven't shared any new information on User Defined Functions (UDFs) available in ANSYS Fluent. Well that may make you think that UDFs are so tough to create, that this person took so long to write his second experience (blog) on UDF! Yeah, it’s funny, but let me tell that this is not the case with me, they (UDFs) are actually so interesting …and huge time & manual effort saver …and productive …and… I can go on and on if I start listing down all the plus points of using UDFs in Fluent. So, long story made short, I was fully enjoying past few months in learning and using this UDF & Scheme programming knowledge to Automate CFD studies in ANSYS Fluent.

CFD Simulation of Flow in a Catalytic Converter

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14 April, 2014 Add new comment

CFD

As the performance of a catalytic converter is substantially affected by the flow distribution inside the substrate, a uniform flow distribution can increase its efficiency, lower the pressure drop and optimize engine performance. The flow distribution in a catalytic converter assembly is governed by the geometry configurations of inlet and outlet cone section, the substrate and exhaust gas compositions and therefore a better design of the catalytic converter is very important. In this blog we shall have insights of CFD modeling approach of flow inside a catalytic converter with the help a flow visualization.

Insights on CFD for Combustion in IC Engines

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10 April, 2014 Add new comment

Fundamentals

In the earlier blog Combustion in Internal Combustion (IC) Engines we had an introduction about the combustion phenomena taking place in an automotive IC engine. The present article is an effort in continuation to have insights on CFD of combustion in IC engines. As we know the key factors that govern the decision making of any automobile buyer in general are, its mileage, performance, maintenance and tentative life apart from passenger comfort and aesthetics. An engine forms the heart of an automobile that can dictate its performance and life and is solely governed by the combustion pattern inside. The detail analysis of combustion in any engine is one of the most important key factors to confirm its efficient design wherein computational fluid dynamics (CFD) proves to be an efficient tool.