Engineering, 06.06.2020 01:57 Melleeroo

A straight and non-moving linear vortex of the initial circulation |-0, is submerged into a viscous fluid of viscosity mu and density p, thus kinematic viscosity of v (think about a straight tornado just formed in air). Due to the viscous effects, the vorticity surrounding this vortex evolves in time as a function of the above-mentioned parameters, the radial distance from the vortex center r and time t. 1. Using the concepts of dimensional analysis, find a dimensionless form of this function f.

2. Using the concept of self-similarity, find the self-similar form of this function f.

3. Explain why it is beneficial for an experimentalist to establish this form of self-similar function without solving Navier-Stokes equations or experimental measurements.

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um

Answers: 2

Answer

Engineering, 04.07.2019 19:10

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false

Answers: 3

Answer

You know the right answer?

A straight and non-moving linear vortex of the initial circulation |-0, is submerged into a viscous...

Questions