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Reynolds number is replaced by a modulus significant of the agitation of the fluid particles in nucleate boiling. Such a dimensionless modulus is defined by the relation

Reynolds number is replaced by a modulus significant of the agitation of the fluid particles in nucleate boiling. Such a dimensionless modulus is defined by the relation Correct Answer Re b = D b G b/δ f

This nucleate boiling regime is of great importance because of the very high heat fluxes possible with moderate temperature differences. Where, D b is the average bubble diameter, G b is the mass velocity of the bubble per unit area and δ f is the fluid viscosity.

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