Explain and discuss the significance of (i) Rayleigh number and (ii) Nusselt number in natural convection

Q: For a natural convection from the vertical plates, if Rayleigh number is given as 1 × 101º then the…

A: Given, Rayleight number = Ra = 1 x 1010   For 109 < Ra < 1012, nusselt number (Nu) can be…

Q: To control the temperature and drying rate of bread, a humidified baking oven is maintained at 166°C…

A: given data;dry bulb temperature (t)=1660cwet bulb temperature (ts)=600cheat transfer coefficient…

Q: A 10 cm * 10 cm plate has a constant surface temperature of 150°C. Determine the Grashof number if…

A: Given data as per question surface temperature = 150°C area = 10 cm * 10 cm Calculations

Q: what factors play a vital role in maximizing the convection heat transfer coefficient ?

A: convection heat transfer coefficient of Heat and mass transfer

Q: the plate is maintained at a temperature of 90°C, while the other side is in- sulated, as shown in…

A:

Q: According to an Atomic Energy Commissionreport, a hydrogen bomb can be approximated as a large…

A: Write the given data:

Q: What is the function of the primary flight control surfaces? How about secondary flight control…

A:

Q: Consider steady heat transfer between two large parallel plates at constant temperatures of T1=300 K…

A:

Q: 1. The dimensionless A. Prandtl number number not used in forced convection is: B. Reynolds number…

A: Note: Since you have asked multiple question, we will solve the first question for you. If you want…

Q: A 0.2-m-long and 25-mm-thick vertical plate (k = 1.5 W/m∙K) separates the hot water from the cold…

A: Fourier's Law:- According to Fourier's law, the rate of heat transfer through conduction is given…

Q: What are the three modes of heat transfer? Describe each briefly.

A: There are three modes of heat transfer namely as follows; 1- Conduction, 2- Convection and 3-…

Q: and Surface temperature 4. In what functions does Nusselt number in natural convection differ from…

A:

Q: If forced convection uses Reynolds number to account for fluid movement during forced convection,…

A: Convection heat transfer: The heat transfer due to the motion of the fluid (air) is known as…

Q: QO What are the types of convection heat transfer?

A: Heat transfer takes place in three types 1. Conduction 2. Convection 3. Radiation

Q: Consider a hot rectangular plate positioned vertically at constant temperature Ts in quiescent air.…

A: For solution refer below images.

Q: Driving force for the free convection is Shear stress forces Buoyancy forces None of the above…

A: This question is from heat transfer.

Q: It isthe process of charging and/or discharging of air by natural or forced convection to or from…

A: The process to which the question refers is ventilation.   Let us understand in simple words, what…

Q: A small, thin metal plate of area A m² is kept insulated on one side and exposed to the sun on the…

A:

Q: Determine the total heat transfer rate to the ice water.

A: Given:   To determine:the total heat transfer rate to the ice water

Q: You are required to measure the temperature of exhaust gas from a petrol engine. During the…

A: According to our guidelines I can solve only 1 question at a time, kindly repost your second…

Q: Explain how the fins enhance heat transfer from a surface. Also, explain how the addition of fins…

A: Basic convection equation is given by

Q: Using your own words and relevant equations, explain why the rate of heat transfer through…

A: The heat transfer through convection is faster than the rate of heat transfer through convection…

Q: Discuss the boundary layer profile that would result for a vertical hot plate, and a vertical cold…

A: Boundary layer of vertical suspended hot plate. Particles of air which contact with plate being hot…

Q: Digital mammography is a technique which acquires images of O the vasculature at extremely high…

A: Digital mammography is a technique in which tungsten is used as the target material. It uses digital…

Q: Define the cooling of a boiled egg by forced and natural convection.

A: Rate of heat transfer by convection is given by Where h is convective heat transfer coefficient.…

Q: A 25-cm circular grill has an emissivity of 0.9. The temperature of the air and surrounding surfaces…

A: To determine the heat transfer from the grill, first of all we need to determine the Reynold number…

Q: (1) Explain the concept of convection heat transfer. What are the methods used for calculating the…

A: To find :-  Concept of convective heat transfer and methods used for calculating the heat transfer…

Q: Consider a hot automotive engine, which can be approximated as a 0.5-m-high, 0.40-m-wide, and…

A: Given data as per question Height of automobile = 0.5m Width of vehicle =0.4 m Length of vehicle=0.8…

Q: Question 1: -Explain the effect of the air velocity on the heat transfer by convection. -Explain the…

A: given; (a) explain the effect of the air velocity on the heat transfer by convection. (b) explain…

Q: Differentiate between free and forced convection with examples.

A:

Q: In free convection heat transfer, Nusselt number is function of А. Grashoff number and Reynold…

A: Ans: option(B) Reason: in free convection heat transfer, Nusselt number is function of Grashoff…

Q: The view factor integral in radiation heat transfer between two bodies A, and A, is given by

A: View-factor: In radiation heat transfer, a view-factor is the ratio of the radiation heat transfer…

Q: When a flat plate is subjected to uniform heat flux, how different are the relations compared to the…

A: To Explain :  How different are the relations compared to the isothermal plate case. Formula used:…

Q: The convection heat transfer coefficient is usually higher v in natural convection than forced…

A:

Q: The furnace water walls of a steam generator having a capacity of 9 kg/s, consist of 130 half…

A:

Q: Illustrate the concept of convection in heat transfer operation and also differentiate forced…

A: Convection Convection is a mechanism of energy transmission that combines the combined effects of…

Q: Explain why convection happens more often in gases and liquids than solids.

A: Convection is a mechanism of heat transfer taking place between two bodies by the movement of…

Q: Calculate the convection heat loss from the top and bottom of a flat 1 m square horizontal…

A:

Q: How is convection caused? Explain with an example?

A: When any fluid is heated, then its lower layer will get heated first, which makes the molecules at…

Q: In experimental aerodynamics, what is the difference between time-averaged and time- resolved…

A: The open cavity is characterized by a mixing layer at the cavity top, that divides the flow field…

Q: With the aid of diagram(s), discuss the variation of heat transfer coefficient with distance over a…

A:

Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.