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Knut Jørgen Måløy - One of the best experts on this subject based on the ideXlab platform.
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Size invariance of the granular Rayleigh-Taylor instability.
Physical review. E Statistical nonlinear and soft matter physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability [J. L. Vinningland, Phys. Rev. Lett. 99, 048001 (2007)] is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than approximately 70 microm or greater than approximately 570 microm in diameter.
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Size invariance of the granular Rayleigh-Taylor instability
Physical Review E : Statistical Nonlinear and Soft Matter Physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability ͓J. L. Vinningland et al., Phys. Rev. Lett. 99, 048001 ͑2007͔͒ is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than ϳ70 m or greater than ϳ570 m in diameter.
Jan Vinningland - One of the best experts on this subject based on the ideXlab platform.
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Size invariance of the granular Rayleigh-Taylor instability.
Physical review. E Statistical nonlinear and soft matter physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability [J. L. Vinningland, Phys. Rev. Lett. 99, 048001 (2007)] is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than approximately 70 microm or greater than approximately 570 microm in diameter.
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Size invariance of the granular Rayleigh-Taylor instability
Physical Review E : Statistical Nonlinear and Soft Matter Physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability ͓J. L. Vinningland et al., Phys. Rev. Lett. 99, 048001 ͑2007͔͒ is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than ϳ70 m or greater than ϳ570 m in diameter.
Renaud Toussaint - One of the best experts on this subject based on the ideXlab platform.
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Size invariance of the granular Rayleigh-Taylor instability.
Physical review. E Statistical nonlinear and soft matter physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability [J. L. Vinningland, Phys. Rev. Lett. 99, 048001 (2007)] is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than approximately 70 microm or greater than approximately 570 microm in diameter.
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Size invariance of the granular Rayleigh-Taylor instability
Physical Review E : Statistical Nonlinear and Soft Matter Physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability ͓J. L. Vinningland et al., Phys. Rev. Lett. 99, 048001 ͑2007͔͒ is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than ϳ70 m or greater than ϳ570 m in diameter.
Eirik Flekkøy - One of the best experts on this subject based on the ideXlab platform.
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Size invariance of the granular Rayleigh-Taylor instability.
Physical review. E Statistical nonlinear and soft matter physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability [J. L. Vinningland, Phys. Rev. Lett. 99, 048001 (2007)] is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than approximately 70 microm or greater than approximately 570 microm in diameter.
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Size invariance of the granular Rayleigh-Taylor instability
Physical Review E : Statistical Nonlinear and Soft Matter Physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability ͓J. L. Vinningland et al., Phys. Rev. Lett. 99, 048001 ͑2007͔͒ is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than ϳ70 m or greater than ϳ570 m in diameter.
Øistein Johnsen - One of the best experts on this subject based on the ideXlab platform.
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Size invariance of the granular Rayleigh-Taylor instability.
Physical review. E Statistical nonlinear and soft matter physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability [J. L. Vinningland, Phys. Rev. Lett. 99, 048001 (2007)] is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than approximately 70 microm or greater than approximately 570 microm in diameter.
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Size invariance of the granular Rayleigh-Taylor instability
Physical Review E : Statistical Nonlinear and Soft Matter Physics, 2010Co-Authors: Jan Vinningland, Øistein Johnsen, Eirik Flekkøy, Renaud Toussaint, Knut Jørgen MåløyAbstract:The size scaling behavior of the granular Rayleigh-Taylor instability ͓J. L. Vinningland et al., Phys. Rev. Lett. 99, 048001 ͑2007͔͒ is investigated experimentally, numerically, and theoretically. An upper layer of grains displaces a lower gap of air by organizing into dense fingers of falling grains separated by rising bubbles of air. The dependence of these structures on the system and grain sizes is investigated. A spatial measurement of the finger structures is obtained by the Fourier power spectrum of the wave number k. As the size of the grains increases the wave number decreases accordingly which leaves the Dimensionless Product of wave number and grain diameter, dk, invariant. A theoretical interpretation of the invariance, based on the scaling properties of the model equations, suggests a gradual breakdown of the invariance for grains smaller than ϳ70 m or greater than ϳ570 m in diameter.