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Forum: Main CFD Forum

July 5, 2010, 03:45

Replies: 6

How to derive this simple stress tensor calculation?

Views: 6,318

Posted By Guillaume_Fournier

I think you're right in the way you wrote the...

I think you're right in the way you wrote the expressions of S_{ij} and \frac{\partial u_i}{\partial x_j}

However, you're mistaken in the fact that S_{ij}\frac{\partial u_i}{\partial x_j} is not...

Forum: Main CFD Forum

July 4, 2010, 17:03

Replies: 6

How to derive this simple stress tensor calculation?

Views: 6,318

Posted By Guillaume_Fournier

Actually, (dui/dxj + duj/dxi)*dui/dxj =...

Actually, (dui/dxj + duj/dxi)*dui/dxj = (dui/dxj)² + duj/dxi*dui/dxj

Now, you have two terms in which the indexes repeat themselves. Therefore, there is a summation on both i and j for each terms...

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