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GATE Exam » GATE Study Materials » Chemical Engineering » Velocity
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Velocity

Explain detail about velocity? What are the differences between speed and velocity? Define variable velocity? What is the velocity of water? Learn everything easy and descriptive about velocity and variable velocity.

Table of Content
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Velocity is a key metric in the Chemical Engineering industry. It is used to measure fluid flow and heat transfer. A high velocity can result in higher efficiency and lower costs.

The velocity of the fluid depends 

  • Size of the pipe, 
  • its diameter, 
  • its length, 
  • as well as on the pressure drop along its length.

Velocity is a function of time that refers to the rate of change of the position of a certain object in any frame of reference, usually measured in metres per second. It is a measure of how fast something is moving. A fluid’s velocity is computed by multiplying its mass by the cross-sectional area it is flowing.

Velocity in Chemical Engineering refers to the speed at which a substance moves as it goes through a process or material. Velocity includes both liquids and gases.

Velocity is the speed of a fluid’s movement. It is measured in feet per second, or ft/s. Velocity has an essential role in engineering and specifically in Chemical Engineering. This course will discuss the different types of velocity and their applications in chemical engineering.

Velocity can be defined as the speed of a fluid’s movement. This course will talk about what velocity means for engineering and how it applies to chemical engineering specifically.

The formula for velocity is 

v = d/t

Where d is the distance and t is time in seconds.

Differences between speed and velocity:

In Chemical Engineering, speed and velocity are two different quantities. Speed is the distance travelled by an object in a given amount of time, while velocity is the rate of change in distance over time.

Speed: The distance an object travels in a given amount of time.

Velocity: The rate of change of distance over time.

Velocity is the speed of an object over a given time interval. Speed is the magnitude of velocity. The difference between these two is that speed is a scalar quantity, whereas velocity has magnitude and direction.

Speed and Velocity in Chemical Engineering:

Speed in Chemical Engineering can be expressed as metres per second, kilometres per hour, or metres per minute. Velocity, on the other hand, has both magnitude and direction. Depending on what you are trying to measure, it can be expressed as kilometres/hour, metres/second, or metres/minute.

Speed and velocity are two important concepts in Chemical Engineering. The first one is the distance travelled by a moving object in a given time, while the second is the rate of speed change.

Speed and velocity are related, but they are not interchangeable. They can be interchanged when used to describe different objects, but not when they refer to various quantities.

Variable velocity:

The variable velocity can make a single-phase flow at a constant rate through a pipe or channel. 

The variable velocity is achieved by changing the speed of the fluid through a rotating blade or impeller. This process is referred to as laminar flow, and it features low turbulence and low-pressure drop.

Laminar flow was first used in 1941 by Kirkpatrick at Bell Labs to produce oxygen for use in military aircraft during World War II.

In Chemical Engineering, variable velocity is a standard process used to change the pressure and flow of fluids.

Variable velocity is the change in velocity of a fluid or gas that occurs due to changes in pressure. The change can be either positive or negative.

The second law of thermodynamics states that heat always flows from hot to cold objects, never vice versa. On the other hand, the first law says that energy cannot be created or destroyed; it is also converted from one form to another.

Conclusion:

The velocity of a particle is defined as its speed in a time interval. Velocity is important because it implies that if you want to know the speed of an object, you need first to figure out its position. The speed of a particle is the distance it travels in a one-time unit. The velocity of a particle is the rate at which it’s moving. It is measured in metres per second or miles per hour. The speed of a car is measured in miles per hour. The velocity of a human being is measured in feet per second.

faq

Frequently asked questions

Get answers to the most common queries related to the Gate Examination Preparation.

What is the definition and formula for velocity?

Ans : Velocity is the rate of flow of materials through a process. The following equation can represent the velocity...Read full

How is velocity expressed?

Ans : Velocity can be expressed in mass per unit time, length per unit time, distance per unit time, and acceleratio...Read full

How is the variable velocity caused?

Ans : Variable velocity is caused by a variety of reasons like  ...Read full

How Is the Variable Velocity Control System used?

Ans : Chemical manufacturers originally used the VVC system as an efficient way to make sure that their products wer...Read full

Ans : Velocity is the rate of flow of materials through a process. The following equation can represent the velocity in Chemical Engineering:

Velocity = Distance /Time

 Where:

D=distance and t = time

Ans : Velocity can be expressed in mass per unit time, length per unit time, distance per unit time, and acceleration due to gravity. It can also be defined as the derivative of position concerning time.

Ans : Variable velocity is caused by a variety of reasons like 

  • Pressure
  • Temperature
  • Viscosity
  • Density

Ans : Chemical manufacturers originally used the VVC system as an efficient way to make sure that their products were being manufactured at the desired flow rate. 

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