... Journal ofHeat Mass Transfer 20 03; 30 (2): 241-250. [17] Bhagoria J.L. and Sahu M.M. Augmentation ofheattransfer coefficient by using 900 broken transverse ribs on absorber plate of solar air heater, ... Transactions of the ASME Journal of turbo machinery 1991b; 1 13: 36 7- 37 4. [8] Hu Z. and Shen J. Heattransfer enhancement in a conversing passage with discrete ribs. Int. Journal Heat and Mass Transfer ... Investigation ofheattransfer and friction for rib-roughened surfaces, Int. Journal ofHeat & Mass Transfer 1978; 21: 11 43- 1156. [4] Webb R.L., Eckert E.R.G. and Goldstein R. J. Heat transfer...
... Study of Light-to -heat Absorption Mechanism in atomic Systems," International Journal ofHeat and Mass Transfer, 41, pp. 839 -849. 3. Häkkinen, H., and Landman, U., 19 93, "Superheating, ... 39 , pp. 37 5- 37 7. 5. Kotake, S., and Kuroki, M., 19 93, "Molecular Dynamics Study of Solid Melting and Vaporization by Laser Irradiation," International Journal ofHeat and Mass Transfer, ... Molecular Dynamics Study on Light-to -heat Absorption Mechanism: Two Metallic Atom System," International Journal of Heat and Mass Transfer, 40, pp. 32 09 -32 22. 2. Shibahara, M., and Kotake,...
... ASME Proceedings of NHTC'01 35 th National HeatTransfer Conference Anaheim, California, June 10-12, 2001 NHTC2001-20070 MOLECULAR DYNAMICS SIMULATION OFHEATTRANSFER AND PHASE ... the distribution of number density of atoms in space at different times, which demonstrates the variation of solid structure during laser heating. At the early stage of laser heating, the crystal ... consisting of 13 atoms or less [1, 2]. Their work was focused on the structural change of metallic atoms due to laser beam absorption. Häkkinen and Landman [3] studied dynamics of superheating,...
... 29Summary 30 CHANGE OF PHASE 31 Classification of Properties 31 Saturation 33 Saturated and Subcooled Liquids 33 Quality 34 Moisture Content 35 Saturated and Superheated Vapors 35 Constant Pressure Heat ... latent heat. The first is the latent heatof fusion. Thisis the amount ofheat added or removed to change phase between solid and liquid. The secondtype of latent heat is the latent heatof vaporization. ... psia = 408 inches of waterã 14.7 psia = 29.9 inches of mercuryã 1 inch of mercury = 25.4 millimeters of mercuryã 1 millimeter of mercury = 10 3 microns of mercuryRev. 0 Page 13 HT-01 Thermodynamics...
... 1 Heat and Temperature 1 Heat and Work 2Modes of Transferring Heat 2 Heat Flux 3 Thermal Conductivity 3 Log Mean Temperature Difference 3 Convective HeatTransfer Coefficient 4Overall HeatTransfer ... 31 Non-Regenerative Heat Exchanger 34 Regenerative Heat Exchanger 34 Cooling Towers 35 Log Mean Temperature Difference Application to Heat Exchangers 36 Overall HeatTransfer Coefficient 37 Summary 39 BOILING HEAT ... modes ofheat transfer: Conduction involves the transferofheat by the interactions of atoms or molecules of amaterial through which the heat is being transferred.Convection involves the transfer...
... Equation 32 Minor Losses 34 Equivalent Piping Length 34 Summary 36 NATURAL CIRCULATION 37 Forced and Natural Circulation 37 Thermal Driving Head 37 Conditions Required for Natural Circulation 38 Example ... Systems 23 Restrictions on the Simplified Bernoulli Equation 25Extended Bernoulli 25Application of Bernoulli’s Equation to a Venturi 27Summary 30 HEAD LOSS 31 Head Loss 31 Friction Factor 31 Darcy’s ... ˙moutlets˙m12˙m10˙m8˙m8˙m12˙m10(ρAv)8˙m12(ρAv)10v8˙m12(ρAv)10(ρA)8500lbmsec62.4lbmft 3 (0.545 ft2)10ftsec62.4lbmft 3 (0 .34 9 ft2)v87 .3 ftsecSummaryThe main points of this chapter are summarized on the next page.Rev. 0 Page 15 HT- 03 ...
... Boundary Layers 38 26.2 Local and Average Convection Coefficients 38 26.2.1 HeatTransfer 38 26.2.2 Mass Transfer 38 36.2 .3 The Problem of Convection 38 56 .3 Laminar and Turbulent Flow 38 96 .3. 1 Laminar ... Methods 33 05.10.1 Discretization of the Heat Equation: The Explicit Method 33 05.10.2 Discretization of the Heat Equation: The Implicit Method 33 75.11 Summary 34 5References 34 6Problems 34 65S.1 ... Law of Cooling 5258.2 .3 Fully Developed Conditions 5258 .3 The Energy Balance 5298 .3. 1 General Considerations 5298 .3. 2 Constant Surface Heat Flux 530 8 .3. 3 Constant Surface Temperature 533 8.4...
... 1 .39 (Continued) where ()2A DL 0.07 m 0.15 m 0. 033 m .s== ì = Hence, ()() ( )22 2824444q 4W/m K 0. 033 m 20 C 0.8 0. 033 m 5.67 10 W/m K 31 3 2 93 K= +ì ìì ⋅ −$ q 2.64 W 3. 33 ... c/3q dT10Tiρ=∀∫∫ ()() 33 3990 kg/m 10gal 3. 79 10 m / gal 4180J/kg Kt 33 5 295 K 4180 s 3 500 Wìì ==ì < (b) From Eq. (1.3a), the heat rate by convection from each heater ... totq/q′′ vs. T, note that the convection heattransfer rate is always a small fraction of the total heat transfer. That is, radiation is the dominant mode ofheat transfer. Note also that the convection...