TRUE or FALSE. Please answer all. Thanks. 1.1 Conduction shape factor (S) has di

Question

TRUE or FALSE. Please answer all. Thanks.
1.1 Conduction shape factor (S) has dimensions of watts (W) in SI units The thermal gradient, dT/dx, perpendicular to an insulated or adiabatic surface is 1 1.2 The Biot number should be much less than 1 to allow a lumped capacitance model to be used, preferably, less than 0.1. 1.3 1.4 For view factors, AiFi AjFi The film temperature is an average boundary layer temperature used for evaluating transport properties in convection calculations. 1.5 1.6 The Rayleigh number's volumetric thermal expansion coefficient ß value has units of 1/sec.

Explanation / Answer

1.1) False . Conduction shape factor = A/L, SI unit : metre

1.2) False. If insulation is applied the temperature variation is not proportional to thickness.

1.3) True. Lumped analysis is possible only if Bi< 0.1

1.4) True

1.5) True.

1.6) False. It has the units of 1/ K.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.