0
Research Papers

Spinoff Challenges for Computational Fluid Dynamics

[+] Author and Article Information
Francis H. Harlow

1407 Eleventh Street,
Los Alamos, NM 87544
e-mail: francisharlow@comcast.net

1Retired from the Los Alamos National Laboratory, Los Alamos, NM 87545.

Manuscript received September 9, 2010; final manuscript received November 29, 2011; published online December 6, 2012. Assoc. Editor: Gerard F. Jones.

J. Heat Transfer 135(1), 011001 (Dec 06, 2012) (7 pages) Paper No: HT-10-1409; doi: 10.1115/1.4007648 History: Received September 09, 2010; Revised November 29, 2011

This paper describes extensions of computational fluid dynamics (CFD) to fields of analysis lying well beyond their current realms of application. In particular, three examples are presented. The first is to the collective behavior of mobs of people interacting with sources of danger and/or opportunity to which each individual responds by actions that depend strongly on the inducement of fear and/or excitement, depending on the intrinsic susceptibilities of the person. This behavior results in both individual activities (agent-based) and collective behaviors (crowd-based stochastic) with consequences of potentially great significance. Extensions are also described for which various other emotional developments are important to the behavior of a mob. The second example is to the processes of biological evolution, in particular to the driving forces that influence the directions of species alterations through a succession of characteristics that are tested for survivability in classical Darwinian fashion. The key to the analysis lies in the newly emerging field of epigenetics, in which numerous important experimental studies are producing astonishing results leading to major challenges to the creation of computational models of the collective fluid-like dynamics of interacting biological species. The third example explores an alternative to the Big Bang theory for describing the origin of our universe. The idea is that a parent universe exists, being composed of energy, matter, and antimatter in various forms. In some region a perturbation occurs, which locally has an excess of matter over antimatter. An enormous gravitational buildup of matter and energy in the region leads to a black hole, in which there is distortion in the fourth dimension. The result then leads to an offspring entity (universe) that becomes completely detached from the parent. To apply computational fluid dynamics to the analysis of this process requires formulations that include a major component of relevant physical representations. In all three of these examples, instabilities, fluctuations, and turbulence play major roles. These arise naturally in agent-based numerical formulations (the first and second of our examples), but are much more challenging to describe in a stochastic representation (e.g., the Navier–Stokes equations). Some promising spectral analysis extensions for stochastic formulations are included in this paper.

FIGURES IN THIS ARTICLE
<>
Copyright © 2013 by ASME
Your Session has timed out. Please sign back in to continue.

References

Harlow, F. H., and Sandoval, D. L., 1986, “Human Collectives Dynamics: The Mathematical Modeling of Mobs,” Mathematical Modeling of Biological Ensembles, Los Alamos National Laboratory, Report No. LA-10765-MS. Available at http://library.lanl.gov/
Sandoval, D. L., Harlow, F. H., and Genin, K. E., 1988, “Human Collective Dynamics: Two Groups in Adversarial Encounter,” Los Alamos National Laboratory, Report No. LA-11247-MS. Available at http://library.lanl.gov/
Hsu, S. S., 2010, “Widescale Disaster Drills Too Scary for Tourists?” The Santa Fe New Mexican (newspaper), Santa Fe, NM, Apr. 13.
Agin, D., 2010, More Than Genes, Oxford University Press, New York, p. 63.
Hayden, T., 2009, “What Darwin Didn't Know,” Smithson. Mag., 39(11), p. 41.
Harlow, F. H., and Ruppel, H. M., 1986, “Mathematical Modeling of Biological Evolution: A Framework for the Investigation of Unanswered Question,” Mathematical Modeling of Biological Ensembles, Los Alamos National Laboratory, Report No. LA-10765-MS. Available at http://library.lanl.gov/
Besnard, D., Harlow, F. H., Rauenzahn, R., and Zemach, C., 1990, “Spectral Transport Model for Turbulence,” Los Alamos National Laboratory, Report No. LA-11821-MS. Available at http://library.lanl.gov/
Steinkamp, M., Clark, T., and Harlow, F., 1999, “Two-Point Description of Two-Fluid Turbulent Mixing–I. Model Formulation,” Int. J. Multiphase Flow, 25, pp. 599–637. [CrossRef]
Steinkamp, M., Clark, T., and Harlow, F., 1999, “Two-Point Description of Two-Fluid Turbulent Mixing–II. Numerical Solutions and Comparisons With Experiments,” Int. J. Multiphase Flow, 25, 639–682. [CrossRef]
Callender, C., 2010, “Is Time an Illusion?,” Sci. Am., 302(6), p. 59. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

A succession of stages in the postulated formation of an offspring universe. The representation is an illustrative example in two space dimensions.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In