3. Experimental results for heat transfer over a flat plate with an extremely rough surface were found to be correlated by an expression of the form: Nux 0.04Rex0.9 Pr1/3 where Nux is the local value of the Nusselt number at a position x measured from the leading edge of the plate. Obtain an expression for the ratio of the average heat transfer coefficient hx to the local coefficient hx. Answer: 1.11
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- Wind blows over a whirlpool hot tub. The air temperature is 290 K with a convection heat transfer coefficient equal to 400 W/m-m- K. The water temperature is 315 Kwith a convection heat transfer coefficient equal to 450 W/m-m-K. Report the temperature at the surface of the water in units of Kand using 4 significant digits. Note that the error band on this answer is 0.5%. Type your nunmeric answer and submitA convection problem has a Nusselt number equai to 10. where the contribution of diffusion is normalised and set equal to a value of 1.0. Select the correct statementis): | The ratio of advection to diffusion is 9. The ratio advection to convection is 10 The ratio of convection to diffusion is 10. The ratio advection to convection is 9. The ratio of advection to diffusion is 10.pitot_tube survey over the cross sectional of 10 cm diameter yield the following data: 0.2 o.4 R 0.95 0.7 07 Umax determine Q if Umex= 1o m by numerical integratiom.
- A J- type thermocouple is used to measure the temperature in a heating process. The length of the bare material is 120mm and thickness is 1.5mm. Find the time constant of the bare material. уре of Thermo-Material K ( Q W/m- (kg/m3) k) IS |(J/Kg- oc) couple J Iron- Constantan 46 8535 345 K Kromel- Alumel 35 8738 380 IT Copper- Constantan 160 8902 316 Cromel - Contantan 33 8825 336 Nicrocil- Nisil 34 8702 376 Pt(30%)Rhodium - 19 15718 56 Pt(6%)Rhodium Platinum(13%)Rodium, 55 16628 99 - Platinum Platinum(10%)Rodium 52.9 16745 99 Platinum Time constant of the bare material is, T=Kısa Sınav:HEAT TRAN X b heat transfer | bartleby x b Search results for 'hea X O WhatsApp W Reynolds sayısı - Vikip x E Thermal entry length X * Reynolds Number Cal x i uzemoys.ogu.edu.tr/courses/10422/quizzes/49234/take/questions/368299 E Uygulamalar G Google O Takip Ediliyor - Twit. O YouTube O Facebook O Eskişehir Osmangaz. KK MM Canvas'ta Oturum AÇ u Online Kurslar - Her... k Şekerbank zumba Kariyer Adam E Okuma listesi ev • Sınav başladığınız andan itibaren etik ilkelere uyacağınızı beyan ve kabul etmiş olmaktasınız. esuzem Başarılar dilerim. Prof. Dr. Zekeriya ALTAÇ A refrigerated compartment of a truck is H=2.4-m high and L =6.6-m long. On a hot summer day, it is parked inside of a storage warehouse at T=35°C. The exterior surface of the compartment is maintained at a uniform T=26°C temperature. The warehouse can be assumed quiescent. Find the steady rate of convection heat loss (in W) from only one-side of the compartment. (Use Churchill-Chu correlation if necessary.)…Completely solve and box the final answers. Write legibly
- Subject Thermodynamics. Instructions: Don't round off in the process. Just round off in the final answer with 2 decimals only. Use 273.15 K to convert Celsius to KelvinThe TPD method measures temperature elevations in a tissue region during a heating pulse and its later temperature decay after the pulse. It is then using the Pennes bioheat equation to perform a curve fitting to determine the local blood perfusion rate. If the TPD probe is placed in the vicinity of very large blood vessel, will the TPD technique provide an accurate measurement of the local blood perfusion in the vicinity of this large blood vessel? Explain briefly. (Hint: Is the Pennes bioheat equation accurate surrounding a large blood vessel?)A Deep-sea Diver is wearing a wetsuit in cold water. (Natural convection, radiative transfer is negligible). The following data are given: Water Temperature Te= 10 Degrees Celsius. Wetsuit thickness is equivalent to a 8mm neoprene rubber (thermal conductivity is 0.19 W/m-K), Skin thickness is 1.45mm, Skin thermal conductivity is 0.21 W/m-k. Body temperature below skin Tb= 37 degrees Celsius. Average Air gap thickness is 1mm, air thermal conductivity = 0.027 w/m-K. a) Draw a complete equivalent thermal circuit and show all parameters. b) Calculate the flux of heat loss from the diver (in W/m^2 of body surface area) c) Calculate the temperature of the skin outer surface (Ts) d) Based on your calculations is the wetsuit adequate to keep the diver warm enough? Why?
- Need help on the Q.A J- type thermocouple is used to measure the temperature in a heating process. Sheath material used is SS316. The length of the sheath is 13mm and thickness is 0.3mm. Find the time constant of the sheath. Material QU(kg/m)s(J/Kg - °c) K(W/m-k) Platinum 21450 130 71.6 SS304 8030 500 21.4 SS316 7990 500 21.4 SS410 7750 460 24.9 Air 1.20 1005 0.025 MgO Powder 3580 877 26.8 Silicon compound3210 800 Time constant of the bare material is, T=The heat transfer for a rod of diameter (D-21 +0.9 mm) immersed in a fluid (conductivity k 0.219% W/mK of value) can be described by a dimensionless quantity called the Nusselt number, which can be calculated using AD Nu where h is the convective heat transfer coefficient (h-115 W/m K with an uncertainty of 3%). Estimate the total uncertainty in Nu.