tual</span> <span class="keywordtype">void</span> Interaction(<span class="keywordtype">size_t</span> index_i, Real dt = 0.0) <span class="keyword">override</span>;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;        };</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div><div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="class_s_p_h_1_1fluid__dynamics_1_1_surface_norm_with_wall.html">   88</a></span>&#