# What is the difference between hydraulic diameter and equivalent diameter?

## What is the difference between hydraulic diameter and equivalent diameter?

The equivalent diameter is defined as two times the hydraulic radius, calculated as the transversal section to the wet perimeter of the section, both being a function of width of the channel and depth of the culture (Eq. 6.17).

### How do you calculate equivalent hydraulic diameter?

The hydraulic diameter is calculated as 4 times the flow area divided by the wetted perimeter of the conduit.

- D h = 4 A P \displaystyle D_{h} = 4\frac{A}{P} Dh=4PA.
- R h = A P \displaystyle R_{h} = \frac{A}{P} Rh=PA.
- D h = 4 R h \displaystyle D_{h} = 4 R_{h} Dh=4Rh.

#### What is hydraulic diameter equation?

Hydraulic diameter can be calculated with the generic equation. dh = 4 A / p (1) where. dh = hydraulic diameter (m, ft) A = area section of the duct or pipe (m2, ft2)

**What is the equivalent of a diameter?**

The equivalent diameter is the diameter of a circular duct or pipe that for equal flow gives the same pressure loss or resistance as an equivalent rectangular duct or pipe.

**What is hydraulic equivalent?**

Hydraulic equivalence is the concept that describes the rela- tion between grains of a mineral of a given size and specific gravity and the smaller grains of heavier minerals that are de- posited simultaneously. Hydraulic-equivalent grains have the same settling velocity under the same conditions.

## How do you calculate hydraulic area?

Area (sq ins) = π x r² where π (pi) = 3.1416 and r = radius in inches squared. Area (sq ins) = π x d² / 4 where π (pi) = 3.1416 and d = diameter in inches. Circumference (ins) = 2 x π x r where π (pi) = 3.1416 and r is radius in inches.

### What is hydraulic diameter for circular pipe?

For a circular tube the hydraulic diameter is simply the diameter of the tube. Rectangular duct (fully filled). The duct is closed so that the wetted perimeter consists of the 4 sides of the duct. For the limiting case of a very wide duct, i.e. a slot of width b, where b ≫ a, then DH = 2a.

#### What is equivalent diameter in heat exchanger?

The equivalent diameter is calculated along (instead of across) the long axes of the shell and therefore is taken as four times the net flow area as layout on the tube sheet (for any pitch layout) divided by the wetted perimeter.

**What is the hydraulic diameter of a 200 mm by 300 mm rectangular duct which air flows?**

A. 15.6 mm… Q: In Fig.

**What do you understand by an equivalent pipe how can the diameter of an equivalent pipe be found?**

An equivalent pipe is defined as the pipe of uniform diameter having loss of head and discharge equal to the loss of head and discharge of a compound pipe consisting of several pipes of different lengths and diameters. There are two combinations of equivalent pipe system: Pipes connected in series.

## What is a hydraulic diameter for circular pipe?

### How is hydraulic diameter defined in non circular tubes?

The hydraulic diameter is typically defined as 4A/P, where A is the area and P is the perimeter. This definition can be applied to an arbitrary shape. All you need to do is calculate A and P based on your geometry.