                     Real r_ij = contact_neighborhood.<a class="code" href="class_s_p_h_1_1_neighborhood.html#a8a44c2a06d377d53b39479308a86edfc">r_ij_</a>[n];</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;                        Real face_wall_external_acceleration = dot((acc_prior_k[index_j] - acc_ave_i), e_ij);</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;                        Real p_in_wall = p_k[index_j] + rho_n_k[index_j] * r_