Various types of attachments can be used with the shop vac shown in Video V5.2. Two such attachments are shown in Fig. P5.20-a nozzle and a brush. The flowrate is \(1 \mathrm{ft}^{3} / \mathrm{s}\).

(a) Determine the average velocity through the nozzle entrance, \(V_{n}\).

(b) Assume the air enters the brush attachment in a radial direction all around the brush with a velocity profile that varies linearly from 0 to \(V_{b}\) along the length of the bristles as shown in the figure. Determine the value of \(V_{b}\).

Figure P5.20

Transcribed Image Text:

Q=1 ft/s Q=1 ft/s 2-in. dia. -- -3-in. dia. 1.5 in.