Self-gravitational structure formation theory for astrophysics and cosmology is revised using nonlinear fluid mechanics. Gibson’s 1996–2000 theory balances fluid mechanical forces with gravitational forces and density diffusion with gravitational diffusion at critical viscous, turbulent, magnetic, and diffusion length scales termed Schwarz scales. Condensation and fragmentation occur for scales exceeding the largest Schwarz scale rather than the length scale introduced by Jeans in his 1902 inviscid-linear-acoustic theory. The largest Schwarz scale is often larger or smaller than From the new theory, the inner-halo dark-matter of galaxies comprises clumps of Earth-mass planets called primordial fog particles (PFPs) condensed soon after the cooling transition from plasma to neutral gas, 300,000 years after the Big Bang, with PFPs tidally disrupted from their clumps forming the interstellar medium. PFPs explain Schild’s 1996 “rogue to be the missing mass” of a quasar lens-galaxy, inferred from twinkling frequencies of the quasar mirages, giving 30 million planets per star. The non-baryonic dark matter is super-diffusive and fragments at large scales to form massive outer-galaxy-halos. In the beginning of structure formation 30,000 years after the Big Bang, with photon viscosity values ν of the viscous Schwarz scale matched the horizon scale giving proto-superclusters and finally proto-galaxies. Non-baryonic fluid diffusivities from galaxy-outer-halo scales measured in a dense galaxy cluster by Tyson, J. A., and Fischer, P., 1995, “Measurement of the Mass profile of Abell 1689,” Ap. J., 446, pp. L55–L58, indicate non-baryonic dark matter particles must have small mass to avoid detection. [S0098-2202(00)01504-2]
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December 2000
Technical Papers
Turbulent Mixing, Viscosity, Diffusion, and Gravity in the Formation of Cosmological Structures: The Fluid Mechanics of Dark Matter
C. H. Gibson, Professor,
C. H. Gibson, Professor,
Departments of MAE and SIO, Center for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, CA 92093-0411
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C. H. Gibson, Professor,
Departments of MAE and SIO, Center for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, CA 92093-0411
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division June 15, 1999; revised manuscript received June 12, 2000. Associate Technical Editor: S. Banerjee.
J. Fluids Eng. Dec 2000, 122(4): 830-835 (6 pages)
Published Online: June 12, 2000
Article history
Received:
June 15, 1999
Revised:
June 12, 2000
Citation
Gibson, C. H. (June 12, 2000). "Turbulent Mixing, Viscosity, Diffusion, and Gravity in the Formation of Cosmological Structures: The Fluid Mechanics of Dark Matter ." ASME. J. Fluids Eng. December 2000; 122(4): 830–835. https://doi.org/10.1115/1.1319156
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