Question: A solid steel sphere (AISI 1010), 300 mm in diameter, is coated with a dielectric material layer of thickness 2 mm and thermal conductivity 0.04

A solid steel sphere (AISI 1010), 300 mm in diameter, is coated with a dielectric material layer of thickness 2 mm and thermal conductivity 0.04 W/m' K. The coated sphere is initially at a uniform temperature of 500°C and is suddenly quenched in a large oil bath for which T_∝ = 100°C and h = 3300 W/m² ∙ K. Estimate the time required for the coated sphere temperature to reach 140°C.

Step by Step Solution

★★★★★

3.42 Rating (177 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

KNOWN Solid steel sphere AISI 1010 coated with dielectric layer of prescribed thickness and thermal ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

8-E-M-E-H-M-T (369).docx

120 KBs Word File

Students Have Also Explored These Related Mechanical Engineering Questions!

A solid steel sphere (E = 210 GPa, v = 0.3) is subjected to hydrostatic pressure such that its volume is reduced by 0.4%. (a) Calculate the pressure p. (b) Calculate the volume modulus of elasticity...

A 5-cm-diameter copper sphere is initially at a uniform temperature of 200C. It is suddenly exposed to an environment at 20C having a heat-transfer coefficient h = 28W/m2C. Using the lumped-capacity...

A 4-cm-diameter copper sphere is initially at a uniform temperature of 200C. It is suddenly exposed to a convection environment at 30C with h = 20 W/m2C. Calculate the time necessary for the center...

Consider Problem 5.9 except now the combined volume of the oil bath and the sphere is V tot = 1m 3 . The oil bath is well mixed and well insulated. (a) Assuming the quenching liquids properties are...

A steel sphere (AISI 1010), $100 \mathrm{~mm}$ in diameter, is coated with a dielectric material layer of thickness $2 \mathrm{~mm}$ and thermal conductivity \(0.04 \mathrm{~W} / \mathrm{m} \cdot...

A 314 grade stainless steel sphere with a diameter of 500 mm is coated with a dielectric material layer of thickness 4 mm and thermal conductivity 0.025 W/m*K. After coating, the sphere is initially...

2. A steel sphere (AISI 1010), 100mm in diameter, is coated with a dielectric material layer of thickness 2mm and thermal conductivity 0.04W/mK. The coated sphere is initially at a uniform...

A solid AISI 302 stainless steel sphere of diameter 170 mm is coated with a 2-mm dielectric layer with a thermal conductivity k =0.03 W/m-K. The sphere is suddenly quenched in a liquid at 100C with a...

Please quality check my solutions for this advanced heat transfer problem. Show all work. Thank you. All original documents are located at the bottom. 3.9 COMPACT HEAT EXCHANGERS 3.9.10-1 3.9.10...

For each of the following cases, determine an appropriate characteristic length L c and the corresponding Biot number Bi that is associated with the transient thermal response of the solid object....

The current through the 20- resistor in Fig. 19-68 does not change whether the two switches S1 and S2 are both open or both closed. Use this clue to determine the value of the unknown resistance R....

The cranberry growers formed a cooperative many years ago to achieve economies of scale for the processing and sale of their cranberries. In that way they can concentrate their efforts on growing and...

7 out of 1 5 Identify the appropriate type of financial institutions for each description below. Banks that focus on helping clients access capital markets and raise capitalFinancial institutions...

Estimate the interest rate paid on a commercial bank loan, trade credit, and commercial paper.

On June 30, Holloway Corporation discontinued its operations in Europe. During the year, the operating loss was $300,000 before taxes. On September 1, Holloway disposed of its European facilities at...

Solve the integrodifferential equations using Laplace transforms. dy (t)/dt + 2y (t)+y()d =1-e-2t, y(0) = 0,t>0

What happens when a scatterplot shows the relationship to be curvilinear?

Horatio opened a checking account at Bridge Bank. Month after month he verified his statement balance to the penny. In December, however, due to buying extra gifts for his sons, Horatio overdrew his...

One way that exporters analyze conditions in emerging markets is through the use of macroeconomic indicators. The Market Potential Index (MPI) is a yearly study conducted by Michigan State...

Repeat Problem 2.85(a), but assume that the billet is only 1.2-m long and the average heat transfer coefficient at both ends is 136 W/(m2 K).A long, 0.6 m OD 347 stainless steel (k = 14 W/(m K))...

A large billet of steel initially at 260?C is placed in a radiant furnace where the surface temperature is held at 1200?C. Assuming the billet is infinite in extent, compute the temperature at point...

A thin flat plate 15 cm square is suspended from a balance into a uniformly flowing stream of engine oil in such a way that the oil flows parallel to and along both surfaces of the plate. The total...

For a study on global warming, an electronic instrument has to be designed to map and the CO2 absorption characteristics of the Pacific Ocean. The instrument package resembles a flat plate with a...

For flow of gas over a flat surface that has been artificially roughened by sand-blasting, the local heat transfer by convection can be correlated by the dimensionless reactionNux = 0.05 Rex0.9(a)...

Please answer the below question with relevant data Bankeware, a Boston-based company specializing in banking-related software, exported its software for automatic teller machines (ATM) to Oslo...