Thermal diffusion in gases:
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Cambridge [u.a.]
Cambridge Univ. Press
1952
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| Schriftenreihe: | Cambridge monographs on physics.
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XI, 143 S. graph. Darst. |
Internformat
MARC
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Datensatz im Suchindex
| _version_ | 1804121376982827008 |
|---|---|
| adam_text | THERMAL DIFFUSION
IN GASES
BY
K E GREW
University College, Exeter
AND
T L IBBS
University of Birmingham
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-CONTENTS
INTRODUCTION page I
CHAPTER I
Discovery and Nature of the Effect
i i Discovery of the effect, p412 The equation of diffusion, p 5; The
steady state, p613 Early experiments, p814 Elementary theories of
thermal diffusion, p 12
CHAPTER II
The Theory of Thermal Diffusion
2 1 The non-uniform state, p 16 2 2 Boltzmann s equation, p 17 2 3 The
solution of Boltzmann s equation, p 21 2 4 The diffusion velocity and the
thermal flux, p 22 2 5 The collision integrals, p 24; Isotopic mixtures and
Lorentzian mixtures, p 25 2 6 The thermal diffusion ratio and the thermal
diffusion factor, p 26 2 7 Theoretical values of the thermal diffusion factor,
p 28; Rigid elastic spheres, p 29; Centres of inverse-power repulsion, p 30;
The Lennard-Jones model, p 30 2 8 The thermal separation ratio, RTy p 33
CHAPTER III
Experimental Methods
3 1 Experimental determination of the thermal diffusion factor, p 36 3 2
Measurement of separation, p 37; Method of multiple separations, p 38; The
approach to the steady state, p 38 3 3 Methods of analysis, p 39; From the
variation of thermal conductivity, p 39; From the variation of viscosity, p 41;
From the variation of refractivity, p 42; Analysis by mass spectrometer, p 42;
Analysis by radioactivity, p 43
CHAPTER IV
Experimental Results
4 1 The inert gas mixtures: non-isotopic, p 46; The separation as a function
of composition, p 46; The separation as a function of temperature, p 48
4 2 Isotopic mixtures, p 50; Neon and argon isotopes, p 50 , Helium isotopes,
p 51; Hydrogen-deuterium, p 52; Isotopic oxygen, nitrogen and methane,
p 53; Isotopic ammonia, p 54 4 3 Some other mixtures, p 54; Hydrogen-
helium, p 54; Hydrogen-nitrogen: extended temperature range, p 56; Hydro
gen-carbon dioxide, p 56; Hydrogen, deuterium and helium with neon, p 56
X CONTENTS
CHAPTER V
Comparison of Experimental and Theoretical Results
5 1 The dependence of the thermal diffusion factor on composition, p 58;
Reversal of the sign of the thermal diffusion factor with changing composition,
p 59 5 2 Effect of pressure on thermal separation, p (12 5 3 The dependence
of the thermal diffusion factor on temperature, p 64; Comparison with results
of viscosity measurements, p 65 5 4 The Lennard-Jones model, p 68; The
viscosity coefficient, p 69; The coefficient of concentration diffusion, p 71 5 41
The thermal diffusion factor, p 72; The inert gas mixtures: non-isotopic, p 73;
Isotopic mixtures, p 73; Neon and argon, p 73; Hydrogen-deuterium, p 74;
Oxygen, nitrogen and methane, p 75; Ammonia, p 75 Other mixtures, p 76;
Hydrogen-helium mixtures, p 76; Hydrogen-nitrogen and hydrogen-carbon
dioxide mixtures, p 76
CHAPTER VI
The Diffusion ThermoefTcct
6 x Introduction, p 78 6 2 The theory of the effect, p 79; The non-
stationary case, p 81; The stationary case, p 84 6 3 The experimental
measurement of the diffusion thermoeffect, p 86 6 4 Experimental results,
p 88
CHAPTER VII
Application of Thermal Diffusion to the Separation of
Gas Mixtures
7 1 The method of Clusius and Dickel, p 91 7 2 The theory of the column,
p 94; Determination of the convection velocity, p 95; Determination of the
transport, p 96; The steady state, p 98 7 3 Modes of operation and efficiency
of columns, p 100 7 4 Experimental work, p IOI ; Separation of isotopic
methane, p 102; Concentration of 3He, p 103; Concentration of lsO, p 105
CHAPTER VIII
Thermal Diffusion in Liquids: The Soret Effect
8 1 Introduction, p 107 8 2 The equation of diffusion and the Soret coeffic ient,
p 108 8 3 Experimental methods and results, p no 8 4 Application of the
separating column, p 116
APPENDIX I Fiirth s Elementary Theory of Thermal Diffusion
Derivation of the equation of diffusion, p 118 ; The thermal diffusion ratio,
kT, p 119
APPENDIX 2 Calculation of the Thermal Diffusion Factor for
Specific Molecular Models
Rigid elastic spheres, p 121; Inverse-power repulsion, p 121; The Lennard-
Jones model, p 121
CONTENTS XI
APPENDIX 3 The Approach to the Steady State, p 123
APPENDIX 4 Identification of the Mean Value of the Thermal
Diffusion Factor with the Actual Value for a Specific Tem
perature, p 126
APPENDIX 5 Comparison of the Values of RT calculated for the
(13, 7) Model with the Experimental Values, p 127
APPENDIX 6 List of Mixtures examined experimentally and
Summary of Results, p 128
APPENDIX 7 Calculated Values of the Thermal Diffusion Factor
for Mixtures examined experimentally when the Molecules are
treated as Rigid Spheres, p 132
LIST OF REFERENCES, p 133
LIST OF SYMBOLS, p 137
INDEX, p 140
|
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| spelling | Grew, Kenneth Edmond Verfasser aut Thermal diffusion in gases by K. E. Grew and T. L. Ibbs Cambridge [u.a.] Cambridge Univ. Press 1952 XI, 143 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Cambridge monographs on physics. Diffusion Gas (DE-588)4019320-2 gnd rswk-swf Diffusion (DE-588)4012277-3 gnd rswk-swf Trennverfahren (DE-588)4078395-9 gnd rswk-swf Thermodiffusion (DE-588)4185139-0 gnd rswk-swf Gas (DE-588)4019320-2 s Diffusion (DE-588)4012277-3 s DE-604 Thermodiffusion (DE-588)4185139-0 s 1\p DE-604 Trennverfahren (DE-588)4078395-9 s 2\p DE-604 Ibbs, Thomas L. Verfasser aut HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=004585061&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis 1\p cgwrk 20201028 DE-101 https://d-nb.info/provenance/plan#cgwrk 2\p cgwrk 20201028 DE-101 https://d-nb.info/provenance/plan#cgwrk |
| spellingShingle | Grew, Kenneth Edmond Ibbs, Thomas L. Thermal diffusion in gases Diffusion Gas (DE-588)4019320-2 gnd Diffusion (DE-588)4012277-3 gnd Trennverfahren (DE-588)4078395-9 gnd Thermodiffusion (DE-588)4185139-0 gnd |
| subject_GND | (DE-588)4019320-2 (DE-588)4012277-3 (DE-588)4078395-9 (DE-588)4185139-0 |
| title | Thermal diffusion in gases |
| title_auth | Thermal diffusion in gases |
| title_exact_search | Thermal diffusion in gases |
| title_full | Thermal diffusion in gases by K. E. Grew and T. L. Ibbs |
| title_fullStr | Thermal diffusion in gases by K. E. Grew and T. L. Ibbs |
| title_full_unstemmed | Thermal diffusion in gases by K. E. Grew and T. L. Ibbs |
| title_short | Thermal diffusion in gases |
| title_sort | thermal diffusion in gases |
| topic | Diffusion Gas (DE-588)4019320-2 gnd Diffusion (DE-588)4012277-3 gnd Trennverfahren (DE-588)4078395-9 gnd Thermodiffusion (DE-588)4185139-0 gnd |
| topic_facet | Diffusion Gas Trennverfahren Thermodiffusion |
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