Mechanical Engineering > Topper Handwritten Notes & Videos for GATE ME > What is Convection Heat and Mass Transfer Tutorial- 10, Heat and Mass Transfer, GATE
What is Convection Heat and Mass Transfer Tutorial- 10, Heat and Mass Transfer, GATE Video Lecture - Topper Handwritten Notes & Videos for GATE ME - Mechanical Engineering
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FAQs on What is Convection Heat and Mass Transfer Tutorial- 10, Heat and Mass Transfer, GATE Video Lecture - Topper Handwritten Notes & Videos for GATE ME - Mechanical Engineering
| 1. What is the definition of convection heat and mass transfer? |  |
Ans. Convection heat and mass transfer refers to the transfer of heat or mass between a solid surface and a fluid medium through the motion of the fluid. It occurs due to the combined effects of conduction (transfer through direct contact) and advection (transfer through fluid motion).
| 2. What are the main modes of heat and mass transfer? | |
Ans. The main modes of heat and mass transfer are conduction, convection, and radiation. Conduction involves the transfer of heat or mass through a solid or stationary medium, while convection involves the transfer through the motion of a fluid medium. Radiation, on the other hand, involves the transfer through electromagnetic waves without the need for a medium.
| 3. How does convection heat and mass transfer occur? | |
Ans. Convection heat and mass transfer occur through the movement of a fluid medium. When a solid surface is in contact with a fluid, the fluid particles near the surface get heated or acquire mass. These particles then become less dense and rise, creating a convective current. As the heated or mass-laden fluid moves away from the surface, it is replaced by cooler or less-mass-laden fluid, thus maintaining the transfer process.
| 4. What are the applications of convection heat and mass transfer? | |
Ans. Convection heat and mass transfer have various applications in everyday life and numerous industries. Some common applications include heating and cooling systems, cooking and baking processes, ventilation and air conditioning, chemical and biological reactors, and heat exchangers. It is also essential in meteorology and climate science to understand the movement of heat and mass in the atmosphere.
| 5. How can convection heat and mass transfer be enhanced? | |
Ans. Convection heat and mass transfer can be enhanced by increasing the fluid flow rate, increasing the temperature difference between the solid surface and the fluid, using fins or extended surfaces, and optimizing the shape and design of the surface to promote better fluid flow. Additionally, using heat or mass transfer enhancers such as turbulence promoters or additives can also improve the efficiency of convection transfer processes.
Text Transcript from Video
so this is el kamar saying again I am
back with another thought well this is
one of the simple total and this total
will be quite I mean short that so I
will just I'm just going to make you
understand what is convection nothing
else right so what is convection
basically suppose that there is steel
rod right and this a temperature of
steel rod is suppose that 100 degree
centigrade and there is a fluid in a
bucket you're having a fluid in a bucket
and the free.you temperature is 10
degree centigrade okay if I will put
this rod in the flavor then what will
happen up to few time after maybe two or
three minutes what will happen the
temperature of this road and Feud will
be same because a temperature here will
transfer into water and most probably
there would be equilibrium in the
temperature of fluid as well as this rod
right so what is happening that's
because of the process that is one of
the heat transfer process that is known
as convection this is happening that's
because of convection now there are two
types of conversation okay so one is
forced convection and one of the another
one is free convection in case of forced
convection we used a external body for
increasing the process of convection and
for transferring for increasing the rate
of transfer of heat from one body to
liquid or maybe gas because in case of
most of the time what is convection
basically transfer of heat from solid to
gaseous or liquid that means fluid is
known as convection so this is all about
convection what is convention but there
few laws and a few dimensionless number
we need to study I will share with you
my upcoming videos about it thanks for
watching see you soon in my next video
so why
back with another thought well this is
one of the simple total and this total
will be quite I mean short that so I
will just I'm just going to make you
understand what is convection nothing
else right so what is convection
basically suppose that there is steel
rod right and this a temperature of
steel rod is suppose that 100 degree
centigrade and there is a fluid in a
bucket you're having a fluid in a bucket
and the free.you temperature is 10
degree centigrade okay if I will put
this rod in the flavor then what will
happen up to few time after maybe two or
three minutes what will happen the
temperature of this road and Feud will
be same because a temperature here will
transfer into water and most probably
there would be equilibrium in the
temperature of fluid as well as this rod
right so what is happening that's
because of the process that is one of
the heat transfer process that is known
as convection this is happening that's
because of convection now there are two
types of conversation okay so one is
forced convection and one of the another
one is free convection in case of forced
convection we used a external body for
increasing the process of convection and
for transferring for increasing the rate
of transfer of heat from one body to
liquid or maybe gas because in case of
most of the time what is convection
basically transfer of heat from solid to
gaseous or liquid that means fluid is
known as convection so this is all about
convection what is convention but there
few laws and a few dimensionless number
we need to study I will share with you
my upcoming videos about it thanks for
watching see you soon in my next video
so why
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