The difference between natural convection and forced convection. The force that causes the convection currents.

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 20, Problem 1P

To determine

The difference between natural convection and forced convection. The force that causes the convection currents.

Expert Solution & Answer

Explanation of Solution

Convection:

It is the mode of heat transfer takes place between the solid materials and the fluids that is in motion. The kinetic energy of the molecules or atoms of a substance is measured in a scale known as temperature. In liquids and gases, the molecules can move freely. Every molecules possess different kinetic energies. When the molecules collide, the kinetic energy is transferred from high kinetic energy molecule to low kinetic energy molecule. This phenomenon is referred as kinetic energy theory. The heat transfer due to this phenomenon is known as convection.

Forced convection:

In convection heat transfer, when the motion of the fluid is caused by the external equipment such as fan and pump, or the wind is known as forced convection.

Natural convection:

In convection heat transfer, when the motion of the fluid is caused only by buoyancy forces is known as natural convection. It is also called as free convection. The buoyancy forces are resultant of density difference due to the temperature variation in the fluid.

Thus, the force that causes the convection currents is buoyancy force.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

A gas turbine cycle has two stages of compression, with an intercooler between the stages. Air enters the first stage at 100 kPa, 300 K. The pressure efficiency of 82%. Air exits the intercooler at 330 K. Calculate the temperature at the exit of each compressor stage and the total specific work required.

For problem 13, your answer should be the same as problem 12. Calculate the flow velocity and the heat transfer/area of the outer surfaces for both duct geometries to see the performance difference of the two designs.

One end of a thin uniform rod of mass m and length 31 rests against a smooth vertical wall. The other end of the rod is attached by a string of length 1 to a fixed point O which is located a distance 21 from the wall. A horizontal force of magnitude F₁ is applied to the lower end of the rod as shown. Assuming the rod and the string remain in the same vertical plane perpendicular to the wall, find the angle 0 between the rod and the wall at the position of static equilibrium. Notes: This quiz is going to walk you through a sequence of steps to do this. It won't give you the answers, but it will hopefully get you to see how to approach problems like this so that you have a working reference/template in the future. This is actually a modified version of a problem from the textbook (6.3). Note that in that problem, is not actually given. It has been introduced for convenience as we move through solving the problem, and should not show up in the final answer. DO NOT DO PROBLEM 6.3. It is…

Answer 2

Question

Chapter 20, Problem 1P

To determine

The difference between natural convection and forced convection. The force that causes the convection currents.

Expert Solution & Answer

Explanation of Solution

Convection:

It is the mode of heat transfer takes place between the solid materials and the fluids that is in motion. The kinetic energy of the molecules or atoms of a substance is measured in a scale known as temperature. In liquids and gases, the molecules can move freely. Every molecules possess different kinetic energies. When the molecules collide, the kinetic energy is transferred from high kinetic energy molecule to low kinetic energy molecule. This phenomenon is referred as kinetic energy theory. The heat transfer due to this phenomenon is known as convection.

Forced convection:

In convection heat transfer, when the motion of the fluid is caused by the external equipment such as fan and pump, or the wind is known as forced convection.

Natural convection:

In convection heat transfer, when the motion of the fluid is caused only by buoyancy forces is known as natural convection. It is also called as free convection. The buoyancy forces are resultant of density difference due to the temperature variation in the fluid.

Thus, the force that causes the convection currents is buoyancy force.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Question

Chapter 20, Problem 1P

To determine

The difference between natural convection and forced convection. The force that causes the convection currents.

Expert Solution & Answer

Explanation of Solution

Convection:

It is the mode of heat transfer takes place between the solid materials and the fluids that is in motion. The kinetic energy of the molecules or atoms of a substance is measured in a scale known as temperature. In liquids and gases, the molecules can move freely. Every molecules possess different kinetic energies. When the molecules collide, the kinetic energy is transferred from high kinetic energy molecule to low kinetic energy molecule. This phenomenon is referred as kinetic energy theory. The heat transfer due to this phenomenon is known as convection.

Forced convection:

In convection heat transfer, when the motion of the fluid is caused by the external equipment such as fan and pump, or the wind is known as forced convection.

Natural convection:

In convection heat transfer, when the motion of the fluid is caused only by buoyancy forces is known as natural convection. It is also called as free convection. The buoyancy forces are resultant of density difference due to the temperature variation in the fluid.

Thus, the force that causes the convection currents is buoyancy force.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Question

Chapter 20, Problem 1P

To determine

The difference between natural convection and forced convection. The force that causes the convection currents.

Expert Solution & Answer

Explanation of Solution

Convection:

It is the mode of heat transfer takes place between the solid materials and the fluids that is in motion. The kinetic energy of the molecules or atoms of a substance is measured in a scale known as temperature. In liquids and gases, the molecules can move freely. Every molecules possess different kinetic energies. When the molecules collide, the kinetic energy is transferred from high kinetic energy molecule to low kinetic energy molecule. This phenomenon is referred as kinetic energy theory. The heat transfer due to this phenomenon is known as convection.

Forced convection:

In convection heat transfer, when the motion of the fluid is caused by the external equipment such as fan and pump, or the wind is known as forced convection.

Natural convection:

In convection heat transfer, when the motion of the fluid is caused only by buoyancy forces is known as natural convection. It is also called as free convection. The buoyancy forces are resultant of density difference due to the temperature variation in the fluid.

Thus, the force that causes the convection currents is buoyancy force.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 20, Problem 1P

To determine

The difference between natural convection and forced convection. The force that causes the convection currents.

Expert Solution & Answer

Explanation of Solution

Convection:

It is the mode of heat transfer takes place between the solid materials and the fluids that is in motion. The kinetic energy of the molecules or atoms of a substance is measured in a scale known as temperature. In liquids and gases, the molecules can move freely. Every molecules possess different kinetic energies. When the molecules collide, the kinetic energy is transferred from high kinetic energy molecule to low kinetic energy molecule. This phenomenon is referred as kinetic energy theory. The heat transfer due to this phenomenon is known as convection.

Forced convection:

In convection heat transfer, when the motion of the fluid is caused by the external equipment such as fan and pump, or the wind is known as forced convection.

Natural convection:

In convection heat transfer, when the motion of the fluid is caused only by buoyancy forces is known as natural convection. It is also called as free convection. The buoyancy forces are resultant of density difference due to the temperature variation in the fluid.

Thus, the force that causes the convection currents is buoyancy force.

Answer 6

Chapter 20, Problem 1P

To determine

The difference between natural convection and forced convection. The force that causes the convection currents.

Expert Solution & Answer

Explanation of Solution

Convection:

It is the mode of heat transfer takes place between the solid materials and the fluids that is in motion. The kinetic energy of the molecules or atoms of a substance is measured in a scale known as temperature. In liquids and gases, the molecules can move freely. Every molecules possess different kinetic energies. When the molecules collide, the kinetic energy is transferred from high kinetic energy molecule to low kinetic energy molecule. This phenomenon is referred as kinetic energy theory. The heat transfer due to this phenomenon is known as convection.

Forced convection:

In convection heat transfer, when the motion of the fluid is caused by the external equipment such as fan and pump, or the wind is known as forced convection.

Natural convection:

In convection heat transfer, when the motion of the fluid is caused only by buoyancy forces is known as natural convection. It is also called as free convection. The buoyancy forces are resultant of density difference due to the temperature variation in the fluid.

Thus, the force that causes the convection currents is buoyancy force.

Answer 7

Chapter 20, Problem 1P

To determine

The difference between natural convection and forced convection. The force that causes the convection currents.

Answer 8

Expert Solution & Answer

Explanation of Solution

Convection:

It is the mode of heat transfer takes place between the solid materials and the fluids that is in motion. The kinetic energy of the molecules or atoms of a substance is measured in a scale known as temperature. In liquids and gases, the molecules can move freely. Every molecules possess different kinetic energies. When the molecules collide, the kinetic energy is transferred from high kinetic energy molecule to low kinetic energy molecule. This phenomenon is referred as kinetic energy theory. The heat transfer due to this phenomenon is known as convection.

Forced convection:

In convection heat transfer, when the motion of the fluid is caused by the external equipment such as fan and pump, or the wind is known as forced convection.

Natural convection:

In convection heat transfer, when the motion of the fluid is caused only by buoyancy forces is known as natural convection. It is also called as free convection. The buoyancy forces are resultant of density difference due to the temperature variation in the fluid.

Thus, the force that causes the convection currents is buoyancy force.