The main objective of this tutorial is to provide step by step guide to perform CFD analysis of unsteady flow using ANSYS FLUENT software. To conceptualize the idea of unsteady flow over a structure, in this tutorial we have considered flow of water over a square cylinder. One of the objective is to learn the process of solving unsteady flow past square cylinder, but the important objective is to understand vortex shedding created on an object. Once the technique is learned, you can apply same procedure for practical cases like flow over tall chimney, building structure, overhead power lines.

This tutorial is a well-known academic problem that one should solve while learning CFD. One of the objective is to learn the process of solving backward step problem, but the important objective is to understand standards of getting solution for such physics. This tutorial is based on CFD modeling software ANSYS FLUENT and will cover simulation steps and post processing required to solve steady state, turbulent flow over backward facing step.

Mesh near wall is very critical to capture boundary layer physics in CFD. This Y Plus / Y+ calculator gives first mesh cell height required for desired Y+ value selected based on turbulence model wall treatment.

This Y plus calculator gives first cell / grid height based on input values of free stream velocity, density and viscosity of working fluid, and a reference length. The desired wall Y+ value in the solution. These calculations are based on flat-plate boundary layer theory.

Beginner in CFD journey has the first question in mind “How do I start learning CFD ?”  Because of the depth of subject and ocean of knowledge available online, there is high probability of getting lost in the learning journey and in many cases getting demotivated from learning CFD itself. This question is asked by many, so I thought of laying out the learning path for CFD beginners. This guide gives a head-start to beginners about what to learn, what to focus on and most importantly from where to learn.

LearnCAx joined Massive Online Open Course (MOOC) on 23rd April 2015. In just 1 month, with 1786 course subscription total 2,57,334 minutes of learning is done by students across the globe. By distributing course worth 0.7 million USD for FREE, LearnCAx platform is marching towards becoming biggest MOOC platform for CFD education.

Computational Fluid Dynamics (CFD) is always been looked at as a complex technology to learn. There are many platforms available to acquire knowledge of subject fundamentals like fluid mechanics, heat transfer and CFD basics, but when it comes to acquiring required software skill sets, there are very few effective platforms.

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