90° curve and elbow

Given the flow

Coefficient

Performs head losses calculations in curves with a known value of $\frac{R}{D}$, and in elbows ($\frac{R}{D}$ = 1). There are two options:

$\frac{R}{D}$ | 1 | 1.5 | 2 | 4 | 6 | 8 |
---|---|---|---|---|---|---|

k | 0.48 | 0.36 | 0.27 | 0.21 | 0.27 | 0.36 |

Given the flow, the pipe diameter and the relation $\frac{R}{D}$, calculates the corresponding head loss.

Given the pipe diameter and the relation $\frac{R}{D}$, calculates the head losses coefficients corresponding to the expressions:

- k applicable to the expression:
$h_f = k. \frac{U^2}{2g}$
- kQ applicable to the expression:
$h_f = k_Q. Q^2$

Performs head losses calculations in curves with a known value of $\frac{R}{D}$, and in elbows ($\frac{R}{D}$ = 1). There are two options:

$\frac{R}{D}$ | 1 | 1.5 | 2 | 4 | 6 | 8 |
---|---|---|---|---|---|---|

k | 0.48 | 0.36 | 0.27 | 0.21 | 0.27 | 0.36 |

Given the flow, the pipe diameter and the relation $\frac{R}{D}$, calculates the corresponding head loss.

Given the pipe diameter and the relation $\frac{R}{D}$, calculates the head losses coefficients corresponding to the expressions:

- k applicable to the expression:
$h_f = k. \frac{U^2}{2g}$
- kQ applicable to the expression:
$h_f = k_Q. Q^2$

- Silvestre, Paschoal. Hidráulica geral. Rio de Janeiro, LTC, 1979.