# Venturi, how does fluid go from low P tube to high P tube

• M_Saint
In summary, the question is asking how fluid moves from a low pressure area created by a Venturi to a high pressure area downstream from the Venturi. The individual is unsure of the mechanism as they understand fluids typically move from high pressure to low pressure. They pose the question of how the fluid moves to a high pressure area, which is a section of pipe with a larger diameter. The response suggests considering the direction of acceleration of the fluid in the region being considered.

## Homework Statement

How does fluid move from low pressure area in a Venturi to a high pressure area, which is downstream from the Venturi.

## The Attempt at a Solution

Not understanding the mechanism here, as I thought fluids only go from high pressure to low presure. Since the Venturi creates a section of low pressure, how does the fluid move to a high pressure area, which is the section of pipe where it has a larger diameter.

Hello and welcome to PF!

Think about the direction of the acceleration of the fluid in the region you are considering.

## 1. What is the Venturi effect?

The Venturi effect is a phenomenon in fluid dynamics where a fluid's velocity increases and its pressure decreases as it flows through a constricted section of a pipe. This was discovered by Italian physicist Giovanni Battista Venturi in the 18th century.

## 2. How does the Venturi effect work?

The Venturi effect works due to the conservation of energy in a fluid. As the fluid flows through a narrow section of a pipe, its velocity increases to conserve the same amount of energy. This increase in velocity leads to a decrease in pressure according to the Bernoulli's principle.

## 3. What is the purpose of the low pressure tube in a Venturi tube?

The low pressure tube in a Venturi tube allows the fluid to flow through a narrow section, increasing its velocity and decreasing its pressure. This is used to measure the flow rate of a fluid and can also be used in applications such as carburetors in cars.

## 4. How does the fluid flow from the low pressure tube to the high pressure tube in a Venturi tube?

The fluid flows from the low pressure tube to the high pressure tube due to the pressure difference created by the Venturi effect. As the fluid flows through the narrow section, its pressure decreases. This creates a pressure difference between the low pressure and high pressure tubes, causing the fluid to flow from the low pressure tube to the high pressure tube.

## 5. What factors affect the fluid flow in a Venturi tube?

The fluid flow in a Venturi tube is affected by several factors such as the diameter of the tubes, the shape of the constriction, and the density of the fluid. These factors can impact the velocity and pressure of the fluid and ultimately affect the efficiency of the Venturi tube.