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In designing an atomizer which generates a spray of liquid, one can adopt atomisation through shear.

Shear in the following cases are to be considered:

  1. stagnant Gas- moving Liquid: in this gas case the gas is stagnant but the liquid is injected at high velocity. This encountered in daily diesel IC engines.
  2. moving gas - moving liquid: this is used in aircraft engines wherein the fast-moving gas atomises the liquid due to shear
  3. moving liquid - moving liquid: this is a not-so-often encountered area but shear does occur when two liquid layers move one over the other.

Comparing the atomization/shear intensity, which of the following will be the highest?

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