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E-raamat: Convective Heat Transfer From Rotating Disks Subjected To Streams Of Air

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This Brief describes systematically results of research studies on a series of convective heat transfer phenomena from rotating disks in air crossflow. Phenomena described in this volume were investigated experimentally using an electrically heated disk placed in the test section of a wind tunnel. The authors describe findings in which transitions between different heat transfer regimes can occur in dependency on the involved Reynolds numbers and the angle of incidence, and that these transitions could be related to phenomenological Landau and Landau-de Gennes models. The concise volume closes a substantial gap in the scientific literature with respect to flow and heat transfer in rotating disk systems and provides a comprehensive presentation of new and recent results not previously published in book form.
1 Introduction
1(4)
References
4(1)
2 Basic Principles
5(12)
2.1 Governing Equations
5(2)
2.2 Boundary-Layer Approach
7(2)
2.3 Self-Similar Solutions
9(1)
2.4 Dimensional Analysis and Correlations
10(2)
2.5 Topology of Three-Dimensional Separated Flows
12(5)
References
16(1)
3 Wind Tunnel Experiments with Rotating Disks
17(12)
3.1 Electrically-Heated Disk Approach
17(4)
3.2 Natural Convection Effects
21(2)
3.3 Data Reduction for Variable Fluid Properties
23(1)
3.4 Wind Tunnel and Inflow Turbulence
24(5)
References
28(1)
4 Axisymmetric Configurations
29(12)
4.1 Free Rotating Disk in Still Air
29(5)
4.2 Stationary Disk in an Orthogonal Stream of Air
34(2)
4.3 Rotating Disk and an Orthogonal Uniform Flow
36(3)
4.4 Jet Impingement onto an Orthogonal Rotating Disk
39(2)
References
39(2)
5 Stationary Disk in Air Stream
41(16)
5.1 Overview
41(2)
5.2 Stationary Disk in a Parallel Stream of Air
43(3)
5.3 Location of Stagnation Point and Bifurcation
46(3)
5.4 Effect of Reynolds Number and Inflow Turbulence
49(3)
5.5 Phenomenological Model for the Transition at ßtr
52(5)
References
54(3)
6 Rotating Disk in Air Stream
57(22)
6.1 Low Rotational Rates: Stagnation Flow Regime
57(2)
6.2 High Rotational Rates: Stagnation Flow Regime
59(2)
6.3 Low Rotational Rates: Parallel Disk
61(6)
6.4 High Rotational Rates: Exact Solution for a Parallel Disk
67(4)
6.5 Arbitrary Rotational Rates: Parallel Disk
71(1)
6.6 Inclined Rotating Disk
72(7)
References
76(3)
7 Large-Eddy-Simulation (LES) Analysis
79(16)
7.1 LES Overview and Formalism
80(3)
7.2 Eddy Viscosity and Diffusivity Assumption
83(2)
7.3 Application of LES for Basic Flows for Rotating Disks
85(1)
7.4 Rotating Disk Heat Transfer LES
86(6)
7.5 Some Remarks Regarding Current Challenges for LES
92(3)
References
92(3)
8 Heat Transfer Correlations for Practical Applications
95(10)
8.1 Superposition Approach
95(2)
8.2 Recommendations for Heat Transfer Correlations
97(5)
8.3 Effect of Prandtl Number
102(1)
8.4 Outlook to Future Research
102(3)
References
103(2)
Index 105