Class eos_tov_linear (o2scl)¶
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class
o2scl
::
eos_tov_linear
: public o2scl::eos_tov¶ Linear EOS \( P = c_s^2 (\varepsilon-\varepsilon_0) \).
This implements a linear EOS with a fixed speed of sound and a fixed energy density at zero pressure. This will also compute the baryon density, if one calls set_baryon_density() to set the baryon density at one fiducial energy density.
Given a fiducial baryon density \( n_{B,1} \) at some energy density \( \varepsilon_1 \) and pressure \( P_1 \), the baryon density is
\[ n_B = n_{B,1} \left[ \frac{\varepsilon(1+c_s^2) - c_s^2 \varepsilon_0 } {\varepsilon_1 (1 + c_s^2) - c_s^2 \varepsilon_0}\right]^{1/(1+c_s^2)} = n_{B,1} \left[ \frac{ \varepsilon + P } {\varepsilon_1 + P_1} \right]^{1/(1+c_s^2)} \]- Note
Experimental
Public Functions
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eos_tov_linear
()¶
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~eos_tov_linear
()¶
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void
set_cs2_eps0
(double cs2_, double eps0_)¶ Set the sound speed and energy density at zero pressure.
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void
set_baryon_density
(double nb, double ed)¶ Set the baryon density.
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double
ed_from_pr
(double pr)¶ From the pressure, return the energy density.
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double
pr_from_ed
(double ed)¶ From the energy density, return the pressure.
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double
nb_from_ed
(double ed)¶ From the energy density, return the baryon density.
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double
nb_from_pr
(double pr)¶ From the pressure, return the baryon density.
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double
ed_from_nb
(double nb)¶ From the baryon density, return the energy density.
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double
pr_from_nb
(double nb)¶ From the baryon density, return the pressure.
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void
ed_nb_from_pr
(double pr, double &ed, double &nb)¶ Given the pressure, produce the energy and number densities.