Virtual Labs

For internal flow in Laminar Region which statement is correct?

Re \gt 4000

Explanation

Re \lt 2000

Explanation

2000 \le Re \le 4000

Explanation

Re = 0

Explanation

Entrance length for internal flow can be estimated by

\frac{Le}{D} = 0.0575 \ Re

Explanation

\frac{D}{Le} = 0.0575 \ Re

Explanation

\frac{Le}{D} = -0.0575 \ Re

Explanation

\frac{D}{Le} = -0.0575 \ Re

Explanation

Ratio of local velocity to max velocity is given by (Internal flow)

\frac{U}{U_{max}} = 1 + \left(\frac{r}{r_0}\right)^2

Explanation

\frac{U}{U_{max}} = 1 + \left(\frac{r_0}{r}\right)^2

Explanation

\frac{U}{U_{max}} = 1 - \left(\frac{r_0}{r}\right)^2

Explanation

\frac{U}{U_{max}} = 1 - \left(\frac{r}{r_0}\right)^2

Explanation

Ratio of max velocity to average velocity is given by (Internal flow)

\frac{U_{max}}{U_{avg}} = 1

Explanation

\frac{U_{max}}{U_{avg}} = 2

Explanation

\frac{U_{max}}{U_{avg}} = 3

Explanation

\frac{U_{max}}{U_{avg}} = 4

Explanation

The friction factor for internal flow is given by

f = \frac{16}{Re}

Explanation

f = -\frac{16}{Re}

Explanation

f = \frac{Re}{16}

Explanation

f = -\frac{Re}{16}

Explanation

For external & laminar flow which statement is valid?

Re \gt 3 \times 10^5

Explanation

Re \le 3 \times 10^5

Explanation

Re \lt 3 \times 10^5

Explanation

Re \ge 3 \times 10^5

Explanation

For external & turbulent flow which statement is valid?

Re \ge 5 \times 10^5

Explanation

Re \gt 5 \times 10^5

Explanation

Re \lt 5 \times 10^5

Explanation

Re \le 5 \times 10^5

Explanation

Fundamental of fluid flow