// Solve the (D1, Mu_h, Beta) system with x and F0 fixed.
func D1MuBetaSolve(env *tempAll.Environment, epsAbs, epsRel float64) (vec.Vector, error) {
// our guess for beta should be above beta_c
if env.A == 0.0 && env.B == 0.0 {
D1, Mu_h, F0 := env.D1, env.Mu_h, env.F0
env.F0 = 0.0 // F0 is 0 at T_c
_, err := tempCrit.CritTempSolve(env, epsAbs, epsRel)
if err != nil {
return nil, err
}
fmt.Printf("%v; Tc = %f\n", env, 1.0/env.Beta)
omegaFit, err := tempCrit.OmegaFit(env, tempCrit.OmegaPlus)
if err != nil {
return nil, err
}
env.A, env.B = omegaFit[0], omegaFit[2]
env.PairCoeffsReady = true
env.Beta += 0.1
// we are at T < T_c; uncache env
env.D1, env.Mu_h, env.F0 = D1, Mu_h, F0
}
//fmt.Printf("%v; Tc = %f\n", env, 1.0 / env.Beta)
// solve low temp system for reasonable values of D1 and Mu_h first
_, err := D1MuSolve(env, epsAbs, epsRel)
if err != nil {
return nil, err
}
// solve the full low temp system
system, start := D1MuBetaSystem(env)
solution, err := solve.MultiDim(system, start, epsAbs, epsRel)
if err != nil {
return nil, err
}
return solution, nil
}
func SolveNoninteracting(env *tempAll.Environment, epsAbs, epsRel float64) (vec.Vector, error) {
env.F0 = 0.0
env.Mu_h = 0.3
env.Beta = 50.0
system, start := NoninteractingSystem(env)
solution, err := solve.MultiDim(system, start, epsAbs, epsRel)
if err != nil {
return nil, err
}
return solution, nil
}
// Solve the (D1, Mu_h, F0) system with x and Beta fixed.
func D1MuF0Solve(env *tempAll.Environment, epsAbs, epsRel float64) (vec.Vector, error) {
if env.A == 0.0 && env.B == 0.0 {
// We must have T < T_c < T_p (Beta > Beta_c > Beta_p).
// Getting Beta_p is fast, so do that first.
D1, Mu_h, F0, Beta := env.F0, env.Mu_h, env.F0, env.Beta // cache env
env.F0 = 0.0 // F0 is 0 at T_c and T_p
_, err := tempPair.PairTempSolve(env, epsAbs, epsRel)
if err != nil {
return nil, err
}
if Beta < env.Beta {
return nil, fmt.Errorf("Beta = %f less than Beta_p in env %s", Beta, env.String())
}
_, err = tempCrit.CritTempSolve(env, epsAbs, epsRel)
if err != nil {
return nil, err
}
if Beta < env.Beta {
return nil, fmt.Errorf("Beta = %f less than Beta_c in env %s", Beta, env.String())
}
fmt.Printf("%v; Tc = %f\n", env, 1.0/env.Beta)
omegaFit, err := tempCrit.OmegaFit(env, tempCrit.OmegaPlus)
if err != nil {
return nil, err
}
env.A, env.B = omegaFit[0], omegaFit[2]
env.PairCoeffsReady = true
// we are at T < T_c; uncache env
env.D1, env.Mu_h, env.F0, env.Beta = D1, Mu_h, F0, Beta
}
// solve low temp system for reasonable values of D1 and Mu_h first
_, err := D1MuSolve(env, epsAbs, epsRel)
if err != nil {
return nil, err
}
// solve the full low temp system
system, start := D1MuF0System(env)
solution, err := solve.MultiDim(system, start, epsAbs, epsRel)
if err != nil {
return nil, err
}
return solution, nil
}