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UNDER CONSTRUCTION

Author: Daniel Kantor and Andrew Einstein, Cornell University

{color:#ff0000}{*}Problem Specification{*}{color}
[1. Create Geometry in GAMBIT|FLUENT - Turbulent Flow Past a Sphere - Step 1]
[2. Mesh Geometry in GAMBIT|FLUENT - Turbulent Flow Past a Sphere - Step 2]
[3. Specify Boundary Types in GAMBIT|FLUENT - Turbulent Flow Past a Sphere - Step 3]
[4. Set Up Problem in FLUENT|FLUENT - Turbulent Flow Past a Sphere - Step 4]
[5. Solve\!|FLUENT - Turbulent Flow Past a Sphere - Step 5]
[6. Analyze Results|FLUENT - SteadyTurbulent Flow Past a Sphere - Step 6]
[7. Refine Mesh|FLUENT - Steady Flow Past a Sphere - Step 7]
[Problem 1|FLUENT - Steady Flow Past a Sphere - Problem 1]
[Problem 2|FLUENT - Steady Flow Past a Sphere - Problem 2]
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h2. Problem Specification

!pb_img001.jpg!

The purpose of this tutorial is to illustrate the setup and solution of a turbulent flow past a sphere. Flow past a sphere is one of the classical problems of fluid mechanics. For this problem, we will be looking at Reynolds number of 1.14E6. 


{latex}
\large
$$
{Re} = {\rho VD \over \mu}
$$
{latex}
We know D = 6. To obtain _Re_ = 1.14E6, we can arbitrarily set ρ, _V_ and μ, but will use the standard values in Fluent. For our case, let's set ρ = 1.225 kg/m ^3^ , _V_ = 2.7754 m/s and μ = 1.7894E-05 kg/ms.
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h2. Preliminary Analysis

For _Re_ = 1.14E6, we are looking at turbulent flow. What will be the velocity profile of this flow? What will be the drag coefficient of the cylinder? What will be the pressure coefficient around cylinder? How will the streamlines around cylinder look like?

Let's start the modeling in our quest to find out the answer\!

We'll create the geometry and mesh in GAMBIT which is the preprocessor for FLUENT, and then read the mesh into FLUENT and solve for the flow solution.
*[*Go to Step 1: Create Geometry in GAMBIT*|FLUENT - Turbulent Flow Past a Sphere - Step 1]*

[See and rate the complete Learning Module|FLUENT - Steady Flow Past a Sphere]

[Go to all FLUENT Learning Modules|FLUENT Learning Modules]