Bernoulli's equation and the contact binaries.

Details Bernoulli's equation and the contact binaries. Bernoulli's equation and the contact binaries.

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...326..155h&link_type=abstract

Astronomy and Astrophysics, v.326, p.155-160

Astronomy and Astrophysics

Astrophysics

3

Stars: Binaries: Close, Hydrodynamics

Scientific paper

In a recent paper Bernoulli's equation has been so interpreted as to mean that the Jacobi energy is constant over the surface of a stationary contact binary. We argue that Bernoulli's result can not be interpreted in this way and show that such a constraint on the Jacobi energy is in general not compatible with stationarity. We also show that, under isentropic conditions, a surface potential gradient can not cause a steady net flow of material across the system's surface plus a deeper return flow. An apparent paradox raised by `stationary solutions' for AB Andromedae can be resolved when it is recognized that Bernoulli's equation does not provide a simple recipe for calculating mean potential differences between contact components.

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