In convection heat transfer, what happens to the heat transfer coefficient if the viscosity of the fluid increases?Select the correct response:The heat transfer coefficient remains constantO None of the aboveThe heat transfer coefficient will decreasesThe heat transfer coefficient will increase

Answered: Image /qna-images/answer/ba69be43-b288-4ece-b2ad-08d04807690a.jpg

Answered: e heat transfer coefficient remains…

Engineering

Mechanical Engineering

e heat transfer coefficient remains constant ne of the above e heat transfer coefficient will decreases

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.27P

See similar textbooks

Related questions

Q: m, n+ 1 Ay m, n q" (27-L + Tmn+1 + Tm,n-1) + 24" Ar 47 = 0 m, n-1 Case 5. Node at a plane surface…

Q: Water flows in a pipe of 0.0475 m inside diame to have at a velocity of 1.5 m/s.Calculate the heat…

Q: Explain if the heat transfer in the situation can be simplified to steady heat transfer or…

Q: Find the rate of heat leakage for a spherical tank 2 m inside diameter and 12 mm thick with thermal…

Q: Steam flows at a temperature of 550C through a pipe (k-80w / mK) with inner and outer diameters of 5…

A: Given: The temperature of the steam is, T1=550°C. The ambient temperature is, T2=15°C The inner…

Q: Water (C = 4180 J/kg-K) enters a 4- cm-diameter tube at 15°C at a rate of 0.06 kg/s. The tube is…

A: Given:Cp=4180 J/kg.Kd=4cm=0.04mm=0.06 kg/sTi=15°Cqs=2500 W/m2To=45°CTo find:-Length of tube, L

Q: A cylindrical tube with inner and outer radius are 10 mm and 20 mm respectively and the temperature…

Q: Fin increase the heat transfer rates by increasing ………………………….

A: Fin increase the heat transfer rates by increasing …………………………. answer the surfce area of the body

Q: Example 6.21 Water at 50°C enters a 1.5 cm diameter tube with a velocity of 1 m/s. The tube wall is…

Q: steam 130°C oil 20°C 60°C !3 kgls

Q: average temperature average flow velocity of m/s, Is flowing by pipeline with an inner diameter of…

A: Given DataTi=80°CV=0.5m/sd=35mm=0.035mL=15mTo=60°Cρ=840kg/m3η=0.233Pa.sλ=0.179W/mK

Q: -9- The plate shown in figure is at a uniform surface temperature of L=5m T, = 50°C. Heat is removed…

A: Given Data: The surface temperature of the plate is Ts=50°C. The ambient temperature is T∞=25°C.…

Q: ) The wall of a refrigerator is constructed of fiberglass insulation (k =0.035 W/m °C) sandwiched…

Q: A stainless steel alloy has cylindrical shape (k = 25 W/m.oC), diameter is 10 cm and 25 cm long,…

Q: why is the fouling factor detrimental? Relate your explanation to the concept of the overall heat…

A: In case of heat exchanger, there are tubes made of metal and flowing fluid (water or any other…

Q: Water enters a 3 cm diameter inner copper pipe of a heat exchanger with a temperature of 18oC and a…

Q: 1-) A hot water produced in a facility enters a thin-walled pipe with a diameter o 9 cm and a length…

A: convection heat transfer coefficient = 11W/m2K

Q: The steel rod (k=43 W/m.K) has 0.3 m is located between two walls seen in figure. The left and right…

Q: Q1. Derive Laplace equation for heat transfer by conduction in three dimension a2T 02T a2T 4 1 ат…

Q: The temperature of a gas stream is to be measured by a thermocouple whose junction can be…

A: Calculate the characteristic length of the sphereLc=VAHere the volume of the sphere is V and the…

Q: A 15% magnesium chloride solution is flowing through a 5-nom sch 40 commercial steel pipe at a rate…

A: Convection (or convective heat transfer) is the flow of fluid that allows heat to be transferred…

Q: Liquid oxygen which is boiling at 61 K is stored in a spherical container, 1 m in diameter covered…

Q: A steam is flowing through a 5.7 m long of steel tube that has inner and outer radii of r, = 0.015…

Q: Steam in a heating system flows through tubes whose outer diameter is 5 cm and whose walls are…

Q: Heat is flowing through the wire of radius r, and thermal conductivity k Wmk. To increase the heat…

Q: Calculate the overall heat transfer coefficient for the following cases: (a) Heat is transferred…

A: a). Given- Area, A=1m2Thickness of plate,t=3cm=0.03mThermal conductivity of steel,Ks=36.4W/mKHeat…

Q: Air at 20°C with a gonvection heat transfer coefficient of 20 W/m4K blows over a pond. The surface…

A: given surface temperature of the pool =Ts =33 c air temperature =TAIR=20 C CONVECTIVE HEAT…

Q: For heat transfer purposes, an egg can be considered to be a 5.5-cm-diameter sphere having the…

A: Given; The diameter of egg, d = 5.5 cm The initial temperature of egg, Ti = 8 C The boiling…

Q: A cylindrical steel rod, 0.01 m in diameter and 0.2 m in length is first heated to 750 °C and then…

Q: Steam flows at 300 °C through the given pipe with an inner radius of 5 cm and a wall thickness of 1…

A: Given- h = 18 W/m2.C K = 30 W/m.C Ts = 220 C T∞ = 300 °C r1 = 5 cm = 0.05 mr2 =5+1=6 cm = 0.06 m L…

Q: A 10 cm thick and 1 m wide long steel plate is immersed in an oil bath at T0=40°C when the…

A: Given: L = 10 cm = 0.1 m W = 1 m Ta = 40' C Ti = 240' C h = 600 W/m2 K For steel, ρ = 7833 kg/m3 Cp…

Q: An electric motor is to be connected by a horizontal steel shaft (k - 42.56 W/m.K), 25 mm in…

A: Given: k=42.56W/mkT0=540°CT∞=27°CTL=52°Ch=40.7W/m2Kd=0.025m Solution: Since the diameter of the fin…

Q: constant cross-section, the Nusselt number at constant wall heat flux (Nug) and that at constant…

A: Given; A hydrodynamically and thermally fully developed laminar flow in which we have to find the…

Q: A plate-shaped glass wall with a thickness of 3 cm and a heat transfer coefficient of 2W / m.K has…

Q: Electric current flows in a 10 mm diameter conductor device with a length of 1 m. A rod with a…

Q: A bare fuel rod has a diameter of 0.373 in and length of 12 ft. The volumetric heat generation rate…

A: Given data: d=0.373 inq'''=10000kW/ft3=34121420 Btu/hrPwater=2250 psiaT∞=575 FTs=675 F To find: Heat…

Q: + A 2 5 What is the effect of roughness on heat transfer, explain it with diagrams

Q: Water (T = 20°C) from a reservoir is pumped up at 5 kg/s through a 3-in Sch. 40 pipe connected to a…

A: Solution: Given Data: Ti=20oCm.=5 kg/sd=3 inL=40 ftW.=-30 kWQ.=3.5 kWzf-zi=7 mCp=4.186 kJ/kg-K

Q: isothermal at 60ºC. The fluid properties of the hot air is as given on Table 1. Determine: The…

Q: U.2 W(III. K) IS auutu to 0.UZ II dlalIcter pipe. TIHE ZAJMIsulating Iaterial wiuI K heat transfer…

A: 1 2

Q: A 10 m long steel pipe carrying steam has a wall thickness of 0.5 cm and an inside radius of 5 cm.…

Q: Which of the following is true for a large heat transfer coefficient? A. It is equivalent to a zero…

A: Heat transfer coefficient is the heat transfer per unit area per unit temperature. The heat transfer…

Q: A room window measure (3 m²) constructed of glass with overall heat transfer coefficient of (4 W/m?.…

Q: How fin efficiency changes with convective heat transfer coefficient h and the thermal conductivity…

Q: A furnace wall is of thickness 0.25 m (L.) and it is exposed to gas at its inner surface and to air…

Q: Discuss the result of thermal conductivity coefficient and compared its value with thermal…

A: Coefficient of thermal conductivity of a material is the ability of a material to conduct heat. It…

Q: Increase in film thickness ………………………..convective heat transfer coefficient

A: Answer Increase in film thickness...Decreases.. convective heat transfer coefficient.

Q: 10-mm-inner-diameter pipe made of commercial steel is used to heat a liquid in an industrial…

Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

In convection heat transfer, what happens to the heat transfer coefficient if the viscosity of the fluid increases?
Select the correct response:
The heat transfer coefficient remains constant
O None of the above
The heat transfer coefficient will decreases
The heat transfer coefficient will increase

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

in convection heat transfer, what happen to the heat transfer coefficient if the viscosity of the fluid decrease?
Water flows at a rate of 0.8 kg /s in a 2.5 -cm diameter tube whose surface is maintained at a constant temperature of 90°C. If water must be heated from 35°C to 40°C, what is the value of the temperature on which you will base the value of the thermal conductivity that will be used to compute for the convection heat transfer coefficient? Express in Celsus.
A water tank is completely filled with liquid water at 20ºC. The tank material is such that it can withstand tension caused by a volume expansion of 0.75 percent. Determine the maximum temperature rise allowed without jeopardizing safety. For simplicity, assume the volume expansion coefficient β at 313 K to be 0.377 × 10–3 K–1. The maximum temperature rise allowed in the tank is ______ ºC.
A long 8-cm diameter vertical steam pipe whose external surface temperature is 90oC passes through some open area that is not protected against the wind blows. Determine the rate of heat loss from the pipe per unit length when the air is at 1 atm, 7oC and the wind is blowing across the pipe at a velocity of 50 km/h. From Table A-1: Thermal conductivity, k = 0.0275 W/m oC , viscosity, v = 1.77 x 10-5 m2/s Prandtl no. Pr = 0.71
Relationship between fluid flow and convection heat transfer
An coconut oil (considered as viscous fluid) must be pumped between two buildings in an agro-industrial plant through an AISI 304 stainless steel pipe spread on the ground that has an outside diameter of 22 cm and 110 m long. To facilitate pumping, the liquid will be heated to 40 ° C in order to reduce its viscosity. The oil flow rate will be 20 Kg / s and the specific heat will be 1300 J / Kg K. Determine the temperature drop that the liquid will experience along the pipeline under the following operating conditions:Ambient air temperature = 10 ° CWind speed = 14 m / sPipe surface temperature = 37 ° C
For internal flow with fully developed flow condition The velocity profile .................... change and the thermal profile .............................. change in the direction of flow Please fill the blank Blank 1 ( Does or does not) Blank 2 ( Does or does not )
Consider the flow of oil (use unused engine oil properties) at 20? in a 30-cm-diameter pipeline at an average velocity of 2 m/s. A 200-m-long section of the pipeline passes through icy waters of a lake at 0?C. Measurements indicate that the surface temperature of the pipe is very nearly 0?C. Disregarding the thermal resistance of the pipe material, determine (a) the temperature of the oil when the pipe leaves the lake, (b) the rate of heat transfer from the oil, and (c) the pumping power required to overcome the pressure losses and to maintain the flow of the oil in the pipe.
Air at 24°C is blown over a hot pipe with a surface area of 2.94 m2 to dissipate 924 W of heat energy. What is the minimum convection heat transfer coefficient that will ensure that the temperature of the pipe surface is less than 45°C [round your final answer to two decimal places]?
A 6cm diameter shaft rotates at 3000rpm in a 20cm long bearing with a uniform clearance of 0.2mm. At steady operating conditions, both the bearing and shaft in the vicinity of the oil gap are 50°C. The thermal conductivity and the viscosity of the lubricating oil are k=0.17 W/m-K and µ= 0.05 N-s/m2, respectively. By simplifying and solving the differential continuity, momentum and energy equation, determine the maximum temperature of oil. (Hint: Couette flow)
Consider the flow of oil at 20oC in a 40-cm-diameter pipeline at an average velocity of 0.5 m/s. A 300-m-long section of the pipeline passes through icy waters of a lake at 0°C. Measurements indicate that the surface temperature of the pipe is very nearly 0°C. Disregarding the thermal resistance of the pipe material, determine the temperature of the oil when the pipe leaves the lake, and the rate of heat transfer from the oil ρ=893.5 kg/m3 Cp=1838 J/kgoC, k=0.146W/m ̊C, Pr=28750, V = 259,1x10-5 m2/s
Oil with density 917 kg/m^3 and viscosity 2.33 kg/m.s flows in a 400 meter long 41-cm-diameter horizontal pipeline at an average velocity of 0.7 m/s. Determine the pumping power required in kW to overcome the pressure losses and to maintain the flow of oil in the pipe. Make sure to check Reynolds number first to identify the type of flow and use the proper equation