Bulk Viscosity: Past to Present

Graves, Robert E.; Argrow, Brian

doi:10.2514/2.6443

Cited by 124 publications

(53 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fact that a monatomic gas has zero bulk viscosity is well known [18,19]. We have shown that this result follows from the conserved quantities and the rotational invariance of the collision operator.…”

Section: Microscopic Expressions For Transport Coefficientssupporting

confidence: 48%

Transport coefficients from the boson Uehling-Uhlenbeck equation

Gust

Reichl

2013

Phys. Rev. E

View full text Add to dashboard Cite

We derive microscopic expressions for the bulk viscosity, shear viscosity and thermal conductivity of a quantum degenerate Bose gas above TC , the critical temperature for Bose-Einstein condensation. The gas interacts via a contact potential and is described by the Uehling-Uhlenbeck equation. To derive the transport coefficients, we use Rayleigh-Schrodinger perturbation theory rather than the Chapman-Enskog approach. This approach illuminates the link between transport coefficients and eigenvalues of the collision operator. We find that a method of summing the second order contributions using the fact that the relaxation rates have a known limit improves the accuracy of the computations. We numerically compute the shear viscosity and thermal conductivity for any boson gas that interacts via a contact potential. We find that the bulk viscosity remains identically zero as it is for the classical case.

show abstract

Section: Microscopic Expressions For Transport Coefficientssupporting

confidence: 48%

Transport coefficients from the boson Uehling-Uhlenbeck equation

Gust

Reichl

2013

Phys. Rev. E

View full text Add to dashboard Cite

show abstract

“…Finally, an overconfidence in the misleading suggestion of Stokes [4] may have contributed to this systematic evasion. Indeed, the absence of volume viscosity effects in dilute monatomic gases such as Ne [44] is an exception and not a rule [21], since κ also arises noticeably in most dense gases and liquids.…”

Section: Introductionmentioning

confidence: 98%

Impact of Volume Viscosity on the Structure of Turbulent Premixed Flames in the Thin Reaction Zone Regime

Fru

Janiga

Thévenin

2011

Flow Turbulence Combust

View full text Add to dashboard Cite

Direct Numerical Simulations (DNS) of turbulent premixed flames burning hydrogen, synthetic gas and methane have been performed, relying on detailed chemical and transport models and taking into account volume viscosity. In this manner, it becomes possible to quantify the impact of this last contribution. It is shown that laminar flames are not modified by volume viscosity, while the local structure of turbulent flames may differ considerably when taking it into account. A noticeable impact is even observed on global flame properties. The modifications induced by the volume viscosity transport term are extremely small at first, but are sufficient to lead to completely different realizations at a later time due to the chaotic nature of turbulence. Noticeable modifications induced by volume viscosity are found for syngas as well as for hydrogen flames. For such hydrogen-containing fuels, the differences appear to remain unchanged when increasing the turbulent Reynolds number. On the other hand, turbulent flames burning methane show no significant impact due to volume viscosity. Since an accurate computation of the volume viscosity transport term is possible on available supercomputers, it is thus recommended to take it into account for detailed studies of turbulent flames burning hydrogen-containing fuels, in particular for DNS, while this term can be safely neglected for higher hydrocarbon flames.

show abstract

“…The material properties used for in both cases are shown in Table 1 and taken from references (Liu et al 1994;Disalvo and Simon 1995;Graves and Argrow 1999;Barsanti and Gualtieri 2005). The properties used for algae were based on the assumption of high-lipid content algae.…”

Section: Resultsmentioning

confidence: 99%

Viscous effects in the acoustic manipulation of algae for biofuel production

Leckey

Hinders

2011

J Appl Phycol

View full text Add to dashboard Cite

Microalgae are emerging as a promising source for environmentally friendly biofuels. Acoustic manipulation of algal cells using standing waves is a relatively new method for dewatering and/or sorting algae harvests. Recent work in the field has shown that acoustic dewatering methods may be more efficient and economical than traditional methods. Optimization of acoustic algal cell manipulation requires a knowledge of the acoustic radiation force upon the cells. Previous work in the field does not account for viscosity of the algal cells or surrounding fluid. We have implemented inviscid and viscous acoustic force models for standing waves incident upon algal cells in salt and freshwater. The results presented in this paper show that significant viscous effects can occur at certain frequencies and/or cell sizes and may need to be taken into account in the development of efficient experimental techniques.

show abstract

Bulk Viscosity: Past to Present

Cited by 124 publications

References 33 publications

Transport coefficients from the boson Uehling-Uhlenbeck equation

Transport coefficients from the boson Uehling-Uhlenbeck equation

Impact of Volume Viscosity on the Structure of Turbulent Premixed Flames in the Thin Reaction Zone Regime

Viscous effects in the acoustic manipulation of algae for biofuel production

Contact Info

Product

Resources

About