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Progress in Turbulence II: Proceedings of the iTi Conference in Turbulence 2005
Martin Oberlack ; George Khujadze ; Silke Günther ; Tanja Weller ; Michael Frewer ; Joachim Peinke ; Stephan Barth (eds.)
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Disponibilidad
Institución detectada | Año de publicación | Navegá | Descargá | Solicitá |
---|---|---|---|---|
No detectada | 2007 | SpringerLink |
Información
Tipo de recurso:
libros
ISBN impreso
978-3-540-32602-1
ISBN electrónico
978-3-540-32603-8
Editor responsable
Springer Nature
País de edición
Reino Unido
Fecha de publicación
2007
Información sobre derechos de publicación
© Springer-Verlag 2007
Cobertura temática
Tabla de contenidos
Hybrid RANS/LES of Neutral Atmospheric Boundary Layer: Simple Terrain
A. Hansen; J. Mann; J. Johansen; N. N. Sørensen
We investigate the decay of freely-evolving, isotropic turbulence whose spectrum takes the form E(k→0)∼Ik, I being Loitsyansky's integral. We report numerical simulations in a periodic domain whose dimensions, l, are much larger than the integral scale of the turbulence, l. We find that, provided l≫l and Re≫1, the turbulence evolves to a state in which Loitsyansky's integral is approximately constant and Kolmogorov's decay law, u∼t, holds true. The approximate conservation of I in fully-developed turbulence implies that the long-range interactions between remote eddies, as measured by the triple correlations, are very weak.
Part IV - Turbulent Boundary Layers | Pp. 155-158
Evidence on Non-Universality of Kármán Constant
Kapil A. Chauhan; Hassan M. Nagib; Peter A. Monkewitz
Posts around the world have been confronted with arguments that they receive competitive advantages and better treatment under domestic law than private sector operators. Independent bodies in several industrialized countries have issued recommendations urging governments to promote competitive equality principles under domestic law. While many critics urge that the playing field be leveled, they often do not take account of the many costly public responsibilities that postal operators must fulfill. The opinion reaffirms that the USPS is a federal government entity and is not subject to competition laws applicable to private sector providers. As a governmental entity, the USPS must fulfill many social policies. Unlike private sector providers in the United States, it must execute universal service obligations. Postal rates must also reflect many noncommercial considerations, and product pricing is driven by social policy as opposed to economic principles. As an employer, the USPS must observe significant, costly restrictions on its ability to set wage and benefit policies. As a purchaser of billions of dollars of goods and services, the USPS must fulfill numerous socio-economic policies that make it less able to acquire goods and services efficiently and at the lowest possible cost. The “level playing field” debate cannot be fairly understood without recognizing the counterbalancing social policy responsibilities borne by postal operators.
Part IV - Turbulent Boundary Layers | Pp. 159-163
Turbulent Marginal Separation: A Novel Triple-Deck Problem for Turbulent Flows
B Scheichl; A Kluwick
Posts around the world have been confronted with arguments that they receive competitive advantages and better treatment under domestic law than private sector operators. Independent bodies in several industrialized countries have issued recommendations urging governments to promote competitive equality principles under domestic law. While many critics urge that the playing field be leveled, they often do not take account of the many costly public responsibilities that postal operators must fulfill. The opinion reaffirms that the USPS is a federal government entity and is not subject to competition laws applicable to private sector providers. As a governmental entity, the USPS must fulfill many social policies. Unlike private sector providers in the United States, it must execute universal service obligations. Postal rates must also reflect many noncommercial considerations, and product pricing is driven by social policy as opposed to economic principles. As an employer, the USPS must observe significant, costly restrictions on its ability to set wage and benefit policies. As a purchaser of billions of dollars of goods and services, the USPS must fulfill numerous socio-economic policies that make it less able to acquire goods and services efficiently and at the lowest possible cost. The “level playing field” debate cannot be fairly understood without recognizing the counterbalancing social policy responsibilities borne by postal operators.
Part IV - Turbulent Boundary Layers | Pp. 165-168
Symmetry-preserving Regularization Modeling of Turbulent Channel Flow
Roel Verstappen
Posts around the world have been confronted with arguments that they receive competitive advantages and better treatment under domestic law than private sector operators. Independent bodies in several industrialized countries have issued recommendations urging governments to promote competitive equality principles under domestic law. While many critics urge that the playing field be leveled, they often do not take account of the many costly public responsibilities that postal operators must fulfill. The opinion reaffirms that the USPS is a federal government entity and is not subject to competition laws applicable to private sector providers. As a governmental entity, the USPS must fulfill many social policies. Unlike private sector providers in the United States, it must execute universal service obligations. Postal rates must also reflect many noncommercial considerations, and product pricing is driven by social policy as opposed to economic principles. As an employer, the USPS must observe significant, costly restrictions on its ability to set wage and benefit policies. As a purchaser of billions of dollars of goods and services, the USPS must fulfill numerous socio-economic policies that make it less able to acquire goods and services efficiently and at the lowest possible cost. The “level playing field” debate cannot be fairly understood without recognizing the counterbalancing social policy responsibilities borne by postal operators.
Part IV - Turbulent Boundary Layers | Pp. 169-173
Numerical Experiments of Turbulent Thermal Convection at High Rayleigh Numbers
K. Koal; G. Amati; F. Massaioli; K. R. Sreenivasan; R. Verzicco
Posts around the world have been confronted with arguments that they receive competitive advantages and better treatment under domestic law than private sector operators. Independent bodies in several industrialized countries have issued recommendations urging governments to promote competitive equality principles under domestic law. While many critics urge that the playing field be leveled, they often do not take account of the many costly public responsibilities that postal operators must fulfill. The opinion reaffirms that the USPS is a federal government entity and is not subject to competition laws applicable to private sector providers. As a governmental entity, the USPS must fulfill many social policies. Unlike private sector providers in the United States, it must execute universal service obligations. Postal rates must also reflect many noncommercial considerations, and product pricing is driven by social policy as opposed to economic principles. As an employer, the USPS must observe significant, costly restrictions on its ability to set wage and benefit policies. As a purchaser of billions of dollars of goods and services, the USPS must fulfill numerous socio-economic policies that make it less able to acquire goods and services efficiently and at the lowest possible cost. The “level playing field” debate cannot be fairly understood without recognizing the counterbalancing social policy responsibilities borne by postal operators.
Part V - Convection | Pp. 177-180
Homogeneous Rayleigh-Bénard Convection
E. Calzavarini; D. Lohse; F. Toschi
Posts around the world have been confronted with arguments that they receive competitive advantages and better treatment under domestic law than private sector operators. Independent bodies in several industrialized countries have issued recommendations urging governments to promote competitive equality principles under domestic law. While many critics urge that the playing field be leveled, they often do not take account of the many costly public responsibilities that postal operators must fulfill. The opinion reaffirms that the USPS is a federal government entity and is not subject to competition laws applicable to private sector providers. As a governmental entity, the USPS must fulfill many social policies. Unlike private sector providers in the United States, it must execute universal service obligations. Postal rates must also reflect many noncommercial considerations, and product pricing is driven by social policy as opposed to economic principles. As an employer, the USPS must observe significant, costly restrictions on its ability to set wage and benefit policies. As a purchaser of billions of dollars of goods and services, the USPS must fulfill numerous socio-economic policies that make it less able to acquire goods and services efficiently and at the lowest possible cost. The “level playing field” debate cannot be fairly understood without recognizing the counterbalancing social policy responsibilities borne by postal operators.
Part V - Convection | Pp. 181-184
A RANS Model for the Pressure-velocity Fluctuation Correlation
L. Chandra; G. Grötzbach
We investigate the decay of freely-evolving, isotropic turbulence whose spectrum takes the form E(k→0)∼Ik, I being Loitsyansky's integral. We report numerical simulations in a periodic domain whose dimensions, l, are much larger than the integral scale of the turbulence, l. We find that, provided l≫l and Re≫1, the turbulence evolves to a state in which Loitsyansky's integral is approximately constant and Kolmogorov's decay law, u∼t, holds true. The approximate conservation of I in fully-developed turbulence implies that the long-range interactions between remote eddies, as measured by the triple correlations, are very weak.
Part V - Convection | Pp. 185-188
Temperature Measurements in a Rectangular Rayleigh-Bénard Cell
A. Maystrenko; C. Resagk; A. Thess
Posts around the world have been confronted with arguments that they receive competitive advantages and better treatment under domestic law than private sector operators. Independent bodies in several industrialized countries have issued recommendations urging governments to promote competitive equality principles under domestic law. While many critics urge that the playing field be leveled, they often do not take account of the many costly public responsibilities that postal operators must fulfill. The opinion reaffirms that the USPS is a federal government entity and is not subject to competition laws applicable to private sector providers. As a governmental entity, the USPS must fulfill many social policies. Unlike private sector providers in the United States, it must execute universal service obligations. Postal rates must also reflect many noncommercial considerations, and product pricing is driven by social policy as opposed to economic principles. As an employer, the USPS must observe significant, costly restrictions on its ability to set wage and benefit policies. As a purchaser of billions of dollars of goods and services, the USPS must fulfill numerous socio-economic policies that make it less able to acquire goods and services efficiently and at the lowest possible cost. The “level playing field” debate cannot be fairly understood without recognizing the counterbalancing social policy responsibilities borne by postal operators.
Part V - Convection | Pp. 189-192
Inertial Convertion in a Vertical Channel
M. Gibert; H. Pabiou; F. Chillà; B. Castaing
Posts around the world have been confronted with arguments that they receive competitive advantages and better treatment under domestic law than private sector operators. Independent bodies in several industrialized countries have issued recommendations urging governments to promote competitive equality principles under domestic law. While many critics urge that the playing field be leveled, they often do not take account of the many costly public responsibilities that postal operators must fulfill. The opinion reaffirms that the USPS is a federal government entity and is not subject to competition laws applicable to private sector providers. As a governmental entity, the USPS must fulfill many social policies. Unlike private sector providers in the United States, it must execute universal service obligations. Postal rates must also reflect many noncommercial considerations, and product pricing is driven by social policy as opposed to economic principles. As an employer, the USPS must observe significant, costly restrictions on its ability to set wage and benefit policies. As a purchaser of billions of dollars of goods and services, the USPS must fulfill numerous socio-economic policies that make it less able to acquire goods and services efficiently and at the lowest possible cost. The “level playing field” debate cannot be fairly understood without recognizing the counterbalancing social policy responsibilities borne by postal operators.
Part V - Convection | Pp. 193-196
Applying the Leray-α Model to Rayleigh-Bénard Convection
M. van Reeuwijk; H. J. J. Jonker; K. Hanjalié
We investigate the decay of freely-evolving, isotropic turbulence whose spectrum takes the form E(k→0)∼Ik, I being Loitsyansky's integral. We report numerical simulations in a periodic domain whose dimensions, l, are much larger than the integral scale of the turbulence, l. We find that, provided l≫l and Re≫1, the turbulence evolves to a state in which Loitsyansky's integral is approximately constant and Kolmogorov's decay law, u∼t, holds true. The approximate conservation of I in fully-developed turbulence implies that the long-range interactions between remote eddies, as measured by the triple correlations, are very weak.
Part V - Convection | Pp. 197-200