vtu question papers of heat and mass transfer

Ngày tải lên: 28/08/2013, 08:31

... Convection Heat and Mass Transfer 457 7.5 The Sphere 465 7.6 Flow Across Banks of Tubes 468 7.7 Impinging Jets 477 7.7.1 Hydrodynamic and Geometric Considerations 477 7.7.2 Convection Heat and Mass Transfer ... in heat transfer. It explains the linkage between heat transfer and thermodynamics, and it reveals the relevance and rich- ness of the subject. It should be covered in its entirety. Much of the ... is 25ЊC and the plate measures 0.3 ϫ 0.3 m with a mass of 3.75 kg and a specific heat of 2770 J/kg ⅐ K. 1.23 A transmission case measures W ϭ 0.30 m on a side and receives a power input of P i ϭ...

Ngày tải lên: 02/04/2014, 15:51

... water-ice mixture. Mass and specific heat of reference sphere. FIND: Specific heat of the test sphere of known mass. SCHEMATIC: ASSUMPTIONS: (1) Spheres are of equal diameter, ... Electrical heater is perfectly insulated from dryer wall, (3) Heater and switch are isothermal at T set , (4) Negligible heat transfer from sides of heater or switch, (5) Switch surface, A s , loses heat ... KNOWN: Power consumption, diameter, and inlet and discharge temperatures of a hair dryer. FIND: (a) Volumetric flow rate and discharge velocity of heated air, (b) Heat loss from case. SCHEMATIC:...

Ngày tải lên: 02/04/2014, 15:52

... COMBINED MODES OF HEAT TRANSFER Previous sections treated each mode of heat transfer separately. But in practice all the three modes of heat transfer can occur simultaneously. Additionally heat generation ... blank type and true or false type questions are provided to test the understanding of the basic principles. Author PREFACE vii VED c-4\n-demo\damo2-3 74 FUNDAMENTALS OF HEAT AND MASS TRANSFER 0.1 ... FUNDAMENTALS OF HEAT AND MASS TRANSFER In this chapter only simple cases will be dealt with and the determination of F will be taken up in the chapter on radiation. The concept of h r is convenient,...

Ngày tải lên: 08/04/2014, 10:55

... value of the heat rate. PROBLEM 1.39 KNOWN: Power consumption, diameter, and inlet and discharge temperatures of a hair dryer. FIND: (a) Volumetric flow rate and discharge velocity of heated ... Electrical heater is perfectly insulated from dryer wall, (3) Heater and switch are isothermal at T set , (4) Negligible heat transfer from sides of heater or switch, (5) Switch surface, A s , loses heat ... KNOWN: Dimensions, thermal conductivity and surface temperatures of a concrete slab. Efficiency of gas furnace and cost of natural gas. FIND: Daily cost of heat loss. SCHEMATIC: ASSUMPTIONS: ...

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

Ngày tải lên: 08/08/2014, 17:20

... symbols dQ and dW represent differential heat transfer and work done, respectively. The differential operator, d, is used as both heat transfer and work are path functions and the evaluation of integrals ... Molecular Mass Transfer 399 24.2 The Diffusion Coefficient 407 24.3 Convective Mass Transfer 428 24.4 Closure 429 25. Differential Equations of Mass Transfer 433 25.1 The Differential Equation for Mass ... to Momentum Transfer Chapter 4 Conservation of Mass: Control-Volume Approach The initial application of the fundamental laws of fluid mechanics involves the law of conservation of mass. In this...

Ngày tải lên: 02/04/2014, 15:51

... Convention for Thermal and Mass Transfer Boundary Conditions A wide variety of thermal and mass transfer boundary conditions can be encoun- tered in practice. Standard thermal and mass transfer boundary ... (m) l ent,ma Mass transfer entrance length (m) l ent,th Thermal (heat transfer) entrance length (m) l M Turbulence mixing length ( m) l M, ma Turbulence mixing length f or mass transfer (m) l heat Heated ... (m) l th Turbulence mixing length f or heat transfer (m) M Molar mass (kg/kmol) Ma Mach number m Mass fraction; dimensionless constant m Mass (kg); mass of a single molecule (kg) m  Mass flux (kg/m 2 s) N Ratio...

Ngày tải lên: 30/03/2014, 19:20

... components Heat output Fig. 9 Micro heat pipe [54] Two-Phase Flow and Heat Transfer in Micro-Channels 57 17. In, S., Jeong, S.: Flow boiling heat transfer characteristics of R123 and R134a in ... knowledge of heat transfer mechanisms at different conditions. Investigations on flow boiling heat transfer in literature have revealed numbers of criteria of system classification, flow instabilities and ... Microchannel Heat Sinks. J. Heat Transf. 129(10), 1341–1351 (2007) 37. Brutin, D., Tadrist, L.: Pressure drop and heat transfer analysis of flow boiling in a minichannel: influence of the inlet...

Ngày tải lên: 31/03/2014, 16:20

... corresponds to that of heat conduction, whilst mass transfer in a flowing fluid, known for short as convective mass transfer corresponds to convective mass transfer. Mass transfer by diffusion and convection ... only sorts of mass transfer. Radiative heat transfer has no corresponding mass transfer process. 1.4.1 Diffusion The calculation of mass transfer by diffusion requires several definitions and rela- tionships ... heat transfer in film condensation, cross current heat transfer and the analogy between heat and mass transfer in evaporation. 76 1 Introduction. Technical Applications We consider a volume of...

Ngày tải lên: 02/04/2014, 15:27

... Convection Heat and Mass Transfer 457 7.5 The Sphere 465 7.6 Flow Across Banks of Tubes 468 7.7 Impinging Jets 477 7.7.1 Hydrodynamic and Geometric Considerations 477 7.7.2 Convection Heat and Mass Transfer ... applicability of heat exchanger analysis to heat sink design and materials processing. Much of the coverage of compact heat exchangers included in the previous edition was limited to a specific heat exchanger. ... of heat transfer by free convection and radiation exchange. (b) To assess the trade-off between current-carrying capacity, operating temperature, and bar diameter, for diameters of 10, 20, and...

Ngày tải lên: 02/04/2014, 15:51

... problems of heat transfer and sometimes mass transfer. This large and very interesting area of fluid mechanics is still developing rapidly. For further information there are a wide range of multiple ... Generation of mass of a species Accumulation of mass of a species Input and output of mass of a species Example 2.1.2-1 Macroscopic species mass balance with zero -0 rde r irreversible ... for mass transfer: r 1 (1.1.2-3) where NA is the mass flux of species A, k, is the single-phase mass transfer coefficient, ZA~ is the concentration of A at the surface, and...

Ngày tải lên: 02/04/2014, 15:53