ApplyDrivingForce.c

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/*
 * This file is part of Lamina.
 *
 * Lamina is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Lamina is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Lamina. If not, see <https://www.gnu.org/licenses/>.
 
 Copyright (C) 2025 Harish Charan, University of Durham, UK
 
 */
 
#include<stdio.h>
#include<stdlib.h>
#include"global.h"
 
void ApplyDrivingForce(){
 int n;
 double Vxblock, Vyblock;
 double Vxsubstrate, Vysubstrate;
 Vxblock = 0.0;  Vyblock = 0.0; 
 Vxsubstrate = 0.0; Vysubstrate = 0.0;
 double gammav;
 gammav = 0.0;
 
 double count_substrate = 0;
 double count_block = 0;
 
 for(n = 1 ; n <= nAtom; n ++){
  if(atomType[n] == 1 || atomType[n] == 2){
  Vxsubstrate += vx[n]; Vysubstrate += vy[n]; 
  count_substrate++;
  }
  if(atomType[n] == 3 || atomType[n] == 4){
  Vxblock += vx[n]; Vyblock += vy[n]; 
  count_block++;
  } }
 
  if(count_substrate > 0) {
    Vxsubstrate /= count_substrate;
    Vysubstrate /= count_substrate;
  }
 
  if(count_block > 0) {
   Vxblock /= count_block;
   Vyblock /= count_block;
  }
 
 for(n = 1 ; n <= nAtom; n ++){
  if(atomType[n] == 1 || atomType[n] == 2){
  ax[n] += -gammav * (vx[n] - Vxsubstrate);
  ay[n] += -gammav * (vy[n] - Vysubstrate);
  }
  if(atomType[n] == 3 || atomType[n] == 4){
  ax[n] += -gammav * (vx[n] - Vxblock);
  ay[n] += -gammav * (vy[n] - Vyblock);
 } } }