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Tagged with scales turbulence
5 questions
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Energy density at a given scale in terms of the Energy Spectrum
Background:
Let us have a turbulent fluid with a random velocity field $\mathbf{u}(\mathbf{x})$.
The volume averaged kinetic energy density $\mathscr{E}_K$ can be expressed as
$$\mathscr{E}_K=\frac{1}{...
- 1,006
1
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1
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109
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Calculating an anisotropic or component Taylor microscale
The Taylor microscale in isotropic turbulence is given by:
$$\lambda = \sqrt{ 15 \frac{\nu \ v'^2}{\epsilon} }$$
where v' is the root mean square of the velocity fluctuations. In general, for ...
- 71
2
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1
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419
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About the formula of the Taylor microscale
I am running simulations of a non-isotropic turbulent flow and I need to compute the Taylor microscale. The formula one can find in the book Turbulent flows (Stephen B. Pope) is :
$\lambda = \sqrt{10} ...
- 21
0
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1
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How does the eddy velocity scale with its time scale?
According to Kolmogorov's energy casacade model, if we have a flow with inertial velocity scale $\mathcal{V}$, inertial length scale $\mathcal{L}$ then we can calculate the eddy velocity of an eddy ...
- 310
11
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2
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What does the Reynolds Number of a flow represent physically?
What does the Reynolds Number of a flow represent physically?
I am having trouble understanding the meaning and the utility of the Reynolds number for a certain flow, could someone please tell me how ...
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