Enter the static pressure drop, momentum pressure drop, and friction pressure drop into the calculator to determine the two phase pressure drop.

## Two Phase Pressure Drop Formula

The following equation is used to calculate the Two Phase Pressure Drop.

Ptp = Ps + Pm+ Pf

• Where Ptp is the two phase pressure drop
• Ps is the static pressure drop
• Pm is the momentum pressure drop
• Pf is the friction pressure drop

To calculate the total two phase pressure drop, add together the pressure drops due to momentum, friction, and static pressures.

## What is a Two Phase Pressure Drop?

Definition:

A two phase pressure drop is the total pressure drop throughout a system in which the flow of the fluid/gas is in two different phases such as in a boiling channel.

## How to Calculate a Two Phase Pressure Drop?

Example Problem:

The following example outlines the steps and information needed to calculate the Two Phase Pressure Drop.

First, determine the static pressure drop. For this example, the static pressure drop is measured to be 50.

Next, determine the pressure drop due to momentum. This is calculate to be 30.

Next, determine the pressure drop due to friction. This is found to be 20.

Finally, calculate the two phase pressure drop using the formula above;

Ptp = Ps + Pm+ Pf

Ptp = 50+30+20

Ptp = 100