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Equation of State Sub-Library: Version 0.910
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00001 /* 00002 ------------------------------------------------------------------- 00003 00004 Copyright (C) 2006-2012, Andrew W. Steiner 00005 00006 This file is part of O2scl. 00007 00008 O2scl is free software; you can redistribute it and/or modify 00009 it under the terms of the GNU General Public License as published by 00010 the Free Software Foundation; either version 3 of the License, or 00011 (at your option) any later version. 00012 00013 O2scl is distributed in the hope that it will be useful, 00014 but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00016 GNU General Public License for more details. 00017 00018 You should have received a copy of the GNU General Public License 00019 along with O2scl. If not, see <http://www.gnu.org/licenses/>. 00020 00021 ------------------------------------------------------------------- 00022 */ 00023 #ifndef O2SCL_BAG_EOS_H 00024 #define O2SCL_BAG_EOS_H 00025 00026 #include <o2scl/constants.h> 00027 #include <o2scl/part.h> 00028 #include <o2scl/quark_eos.h> 00029 00030 #ifndef DOXYGENP 00031 namespace o2scl { 00032 #endif 00033 00034 /** \brief Simple bag model 00035 00036 An equation of state with \f$ P=-B+P_{u,FG}+P_{d,FG}+P_{s,FG} 00037 \f$ where \f$ P_{i,FG} \f$ is the Fermi gas contribution from 00038 particle \f$ i \f$ and \f$ B \f$ is a density- and 00039 temperature-independent bag constant. 00040 00041 The finite temperature functions run the zero temperature code 00042 if the temperature is less than or equal to 0. 00043 */ 00044 00045 class bag_eos : public quark_eos { 00046 00047 public: 00048 00049 bag_eos(); 00050 00051 virtual ~bag_eos() {}; 00052 00053 virtual int calc_p(quark &u, quark &d, quark &s, thermo &th); 00054 00055 virtual int calc_e(quark &u, quark &d, quark &s, thermo &th); 00056 00057 /** \brief Calculate equation of state as a function of 00058 the chemical potentials 00059 00060 This function returns zero (success) unless the 00061 call to quark::pair_mu() fails. 00062 */ 00063 virtual int calc_temp_p(quark &u, quark &d, quark &s, 00064 double temper, thermo &th); 00065 00066 /** \brief Calculate equation of state as a function of 00067 the densities 00068 00069 This function returns zero (success) unless the 00070 call to quark::pair_density() fails. 00071 */ 00072 virtual int calc_temp_e(quark &u, quark &d, quark &s, 00073 double temper, thermo &th); 00074 00075 /// The bag constant in \f$ fm^{-4}\f$ (default \f$200/(\hbar c) \f$). 00076 double bag_constant; 00077 00078 /// Return string denoting type ("bag_eos") 00079 virtual const char *type() { return "bag_eos"; } 00080 }; 00081 00082 #ifndef DOXYGENP 00083 } 00084 #endif 00085 00086 #endif
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