Binary

I took luminosity into consideration.

The primary's luminosity is large so the photons on the dust drive the dust and gas away from the primary. The secondary is assumed to be dim - although it actually maybe not given that it is a WD. In all, the secondary star has full gravity on gas while the primary has no gravity on gas as soon as the dust form at 4 AU.

I also assumed that, there is a magic that the dust evolves such that the photon-dust interaction changes. The scattering and absorption of photon diminish at 12 AU away from the primary. This is only a test in order to see what will happen.

The primary is pulsating periodically with a period of 36 yrs and pulsation last for 1.1 yr. The pulsation is similar to the last post.

Temperature is isothermal at 2000 K. Separation is 7 AU. At this separation and temperature, the accretion mode is probably WRLOF or RLOF.

Total simulation bos is

density.mov​

It looks like a steady state disk as gas is continuously coming out from the primary.

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