Linked In Discussion -
URL : How does the Grid shape and Quality affect the solution ?
This discussion has some excellent comments related to the approach of setting up a grid as well as the logic behind such decisions. It also highlights the characteristics and concepts of using different cell types as well as the difficulties encountered in setting up a structured or unstructured grid.
Linked In Discussion -
URL : How many of you do Verification and Validation for your domain? or simply trust what you did is correct?
Any student of CFD can benefits from discussions in forums, especially when the replies are from experienced and seasoned multi-national professionals practicing CFD. One can always miss certain aspects or perspectives during intense research, or simply may not have come across the issue being put across in a such a succinct manner. Words and the way they are combined and finally presented, have a mysterious way of opening up one’s mind.
I feel it is important to read & participate in discussions that enhance everybody’s understanding of a subject, especially one as complicated (and beneficial) as CFD. Depending on the forum, one ends up exchanging views with an international community, which enhances the reliability of the knowledge gained from these discussions. Check out these Research Networks and Forums
Note: Linked-in Membership is not required to view this discussion, since it was posted in an ‘open' CFD group’.
Summary of the discussion + extracts from notable comments so far :
I found this website Bookboon which has a collection of free textbooks, catering to a wide range of subjects that are both technical as well as non technical. The books are meant for students and are often posted by professors and researchers aiming to cover angles missing in mainstream books and also provide an introduction that is not very mathematically intense. There are textbooks available covering several engineering concepts and disciplines like that of Heat Transfer and Basic Concepts of Turbomachinery , to mention a few.
This CFD book can serve as a great introduction to CFD for the beginner, especially one intimidated by the vast amount of mathematics involved to master. The book introduces the terms used in the Governing equations in a lucid manner, emphasizing on what the terms mean and also states the fundamental assumptions behind different equations, based on the situation/physics. I found the language quite simple and easy to understand. A fundamental underrstanding of differential equations would definitely help. However, look elsewhere for detailed mathematical derivations and treatises. You can take a look at the Learning Resources section on this website for additional resources to understand CFD.
Andre Bakker and Elizabeth Marsden Marshal - Computational Fluid Mixing(CFM) booklet and other resources
Source : Bakker A. (2008) The Colorful Fluid Mixing Gallery
Though the booklet is about implementing Mixing Simulations, in particular, I found it's introductory section on mixing and followed by the fundamentals of CFD very interesting and useful. The introductory section explores many aspects of CFD in a very concise, and lucid manner. It would probably cater better for those with some prior knowledge of the terms used in CFD and numerical techniques.
What I found most appealing was how it provides an overview, while establishing a functional inter connection between various concepts. A quick read of relevant sections of this book could be very helpful in rehashing fundamental CFD concepts and would help the beginner organize his knowledge without ambiguities, or atleast reduced complications.
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