Renold

Views Updated: Dec 15, 2025

Abbreviation

RNO

Pronunciation

/ˈrɛnoʊld/

In ocean engineering realm, fluid drags are computed by Morison equation with drag coefficient defined by a function of Renold(RNO) number and attack angle.
This paper analyses the dynamic movement of oil droplet and separation principle of hydrocyclone based on two-phase flow dynamics. The results show that Renold(RNO) number, Webber number and Stokes number should be mainly taken into account when we engage in hydraulic tests and similarity analysis of hydrocyclone.
The research on hypersonic slip flow grid effect for air heating problem are carried out, the results reveals that in slip flow, the accommodation coefficients have little impact on heat flux convergence which can be obtained using 1-2 grid Renold(RNO) number.
Renold(RNO) stress turbulence model is chosen and three computational models, that are single bridge, single vehicle and vehicle-bridge coupled system, are established respectively.
By the similarity analysis of flow process in engine's port, it's found that at the base that Renold(RNO) number is big enough, in-qualitative rule Euler number Eu and similar invariable dimensionless swirl NR keep unaltered.

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