Mechanical Engineering

1)      The analysis of radiation transfer in enclosures consisting of black surfaces is relatively easy but…

1)      Radiation heat transfer between surfaces depends on the orientation of the surfaces relative to each…

1)       b)      In general, the differential solid angle dω subtended by a differential surface area dA when viewed from a…

1)      A body at a temperature above absolute zero emits radiation in all directions over a…

1)      The electromagnetic spectrum includes cosmic waves, gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation,…

1)      Whether the convection is force or natural is found out by finding out the ratio…

1)      Natural convection heat transfer on a surface depends on a)      Geometry of the surface b)      Orientation of…

1)       a)      In the absence of other forces, the net vertical force acting on a body…

1)       b)      Boundary conditions:   c)      Initial condition:  d)      Solution:  2)               Dimensionless heat transfer coefficient 3)                     Dimensionless time also denoted by τ…

3)      Criteria for Lumped System Analysis a)      Characteristic length  b)      Biot Number Bi c)      When a solid body is being heated…