Line data    Source code

       1              : /*
       2              :  * Copyright (c) 2014-2015:  G-CSC, Goethe University Frankfurt
       3              :  * Author: Andreas Vogel
       4              :  * 
       5              :  * This file is part of UG4.
       6              :  * 
       7              :  * UG4 is free software: you can redistribute it and/or modify it under the
       8              :  * terms of the GNU Lesser General Public License version 3 (as published by the
       9              :  * Free Software Foundation) with the following additional attribution
      10              :  * requirements (according to LGPL/GPL v3 §7):
      11              :  * 
      12              :  * (1) The following notice must be displayed in the Appropriate Legal Notices
      13              :  * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
      14              :  * 
      15              :  * (2) The following notice must be displayed at a prominent place in the
      16              :  * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
      17              :  * 
      18              :  * (3) The following bibliography is recommended for citation and must be
      19              :  * preserved in all covered files:
      20              :  * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
      21              :  *   parallel geometric multigrid solver on hierarchically distributed grids.
      22              :  *   Computing and visualization in science 16, 4 (2013), 151-164"
      23              :  * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
      24              :  *   flexible software system for simulating pde based models on high performance
      25              :  *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
      26              :  * 
      27              :  * This program is distributed in the hope that it will be useful,
      28              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      29              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      30              :  * GNU Lesser General Public License for more details.
      31              :  */
      32              : 
      33              : #ifndef __H__UG__LIB_DISC__SPATIAL_DISC__ROTATING_CONE__
      34              : #define __H__UG__LIB_DISC__SPATIAL_DISC__ROTATING_CONE__
      35              : 
      36              : #include "lib_disc/spatial_disc/user_data/std_glob_pos_data.h"
      37              : 
      38              : namespace ug{
      39              : 
      40              : class RotatingCone2d
      41              :         : public StdGlobPosData<RotatingCone2d, number, 2>
      42              : {
      43              :         public:
      44            0 :                 RotatingCone2d(double _eps, double _cx, double _cy, double _ax, double _ay,
      45              :                              double _nu, double _delta)
      46            0 :                         : eps(_eps), cx(_cx), cy(_cy), ax(_ax), ay(_ay), nu(_nu), delta(_delta)
      47            0 :                 {};
      48              : 
      49            0 :                 inline void evaluate(number& val, const MathVector<2>& pos, number time, int si) const
      50              :                 {
      51              :                         const number t = time;
      52            0 :                         const number x = pos[0];
      53            0 :                         const number y = pos[1];
      54              : 
      55            0 :                         const number xRot = cos(nu*t) * (x-cx) - sin(nu*t) * (y-cy);
      56            0 :                         const number yRot = sin(nu*t) * (x-cx) + cos(nu*t) * (y-cy);
      57              : 
      58            0 :                         const number expo = -((xRot - ax)*(xRot - ax) + (yRot - ay)*(yRot - ay)) / (delta + 4*eps*t);
      59            0 :                         const number scale = delta/(delta+4*eps*t);
      60              : 
      61            0 :                         val = scale * exp(expo);
      62            0 :                 }
      63              : 
      64              :         protected:
      65              :                 double eps, cx, cy, ax, ay, nu, delta;
      66              : };
      67              : 
      68              : }
      69              : #endif // __H__UG__LIB_DISC__SPATIAL_DISC__ROTATING_CONE__