Modeling in Transport Phenomena. A Conceptual Approach by Ismail Tosun

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By Ismail Tosun

Content material:
Preface to the second one edition

, Page xvii
Preface to the 1st edition

, Pages xix-xxi
1 - Introduction

, Pages 1-12
2 - Molecular and convective transport

, Pages 13-34
3 - Interphase shipping and move coefficients

, Pages 35-57
4 - assessment of move coefficients: Engineering correlations

, Pages 59-115
5 - cost of new release in momentum, strength, and mass transport

, Pages 117-130
6 - Steady-state macroscopic balances

, Pages 131-159
7 - Unsteady-state macroscopic balances

, Pages 161-211
8 - regular microscopic balances with out generation

, Pages 213-304
9 - regular microscopic balances with generation

, Pages 305-407
10 - Unsteady-state microscopic balances with out generation

, Pages 409-482
11 - Unsteady-state microscopic balances with generation

, Pages 483-522
Appendix A - Mathematical preliminaries

, Pages 523-556
Appendix B - ideas of differential equations

, Pages 557-588
Appendix C - Flux expressions for mass, momentum, and energy

, Pages 589-594
Appendix D - actual properties

, Pages 595-599
Appendix E - Constants and conversion factors

, Pages 601-602
Index

, Pages 603-606

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Extra resources for Modeling in Transport Phenomena. A Conceptual Approach

Example text

8. Pressure force acting on curved and flat surfaces. 8. Therefore, the friction factor for flow over flat plates and for flow inside circular ducts includes only friction drag, whereas the friction factor for flow around cylinders, spheres, and other bluff objects includes both friction and form drags. As a result, the f/2 term for flow around cylinders and spheres is greater than the j -factors. 4 Water evaporates from a wetted surface of rectangular shape when air at 1 atm and 35 ◦ C is blown over the surface at a velocity of 15 m/s.

6) in Eq. (1) gives the molar rate of transfer of species A as 1 W cAo n˙ A = 2 (4/3) 3ρgδ μ 1/3 (DAB L)2/3 (7) 28 2. 4-15) As in the case of mass, energy may enter or leave the system by two means: • By inlet and/or outlet streams, • By exchange of energy between the system and its surroundings through the boundaries of the system in the form of heat and work. When energy enters and/or leaves the system by a conduit(s), the characteristic velocity is taken as the average velocity of the flowing stream and it is usually large enough to neglect 1.

The average values of the friction factor, the Nusselt number, and the Sherwood number can be obtained from the local values by the application of the mean value theorem. In many cases, however, the transition from laminar to turbulent flow will occur on the plate. In this case, both the laminar and turbulent flow regions must be taken into account in calculating the average values. 2-2) xc Change of variable from x to Rex reduces Eq. 2-5) Substitution of Eqs. 1 into Eq. 2-7) The average values of the friction factor, the Nusselt number, and the Sherwood number can be calculated in a similar way for a variety of flow conditions.

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