ens analvSIis a. is a process ating fluid mechanics p ems in in s of non- dimens

Question

ens analvSIis a. is a process ating fluid mechanics p ems in in s of non- dimensional variables and parameters b. Helps in understanding physics c. Useful in data analysis and modeling d. all of the above completely unded by solid surfaces called internal or duct flows a. True b. False In liquids a. viscosity b. viscosity decreases with increasing temperature c. incre s on pressure ases with increasing temperature d. none of the above n gases, viscosity increases with increasing temperature (l.e interchange between layers increases wi shear perature setting up st nterna a. True b. False

Explanation / Answer

31) The dimensionless analysis is a process of formulation fluid mechanics problems in terms of dimensionaless numbers and parameters like mach number, reynolds number etc. It also helps in understanding the physic of the problem. It is useful in modeling as well

hence d) all of the above

32) The fluid is completely bounded by the surface, it is called as 'Internal flow'.

Hence option a) true

33) In liquids,

Viscosity decreases with the temperature increase

Hence option b) viscosity decreases with the increasing temperature

34) Viscosity in gases arises principally from the molecular diffusion that transports momentum between layers of flow. hence true.

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