Why Does a Fluid Jet Become Unstable at Wavelengths Exceeding Its Perimeter?

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larsa
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Why a fluid jet becomes unstable only when the wavelength of the perturbation exceeds the value of jet perimeter?

Do you imagine any physical reason behing this?
 
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larsa said:
Why a fluid jet becomes unstable only when the wavelength of the perturbation exceeds the value of jet perimeter?

Do you imagine any physical reason behing this?

Interfacial energy.
 

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