l contact_angle_;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;            Real smoothing_length_;</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;            Real particle_spacing_;</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;            StdLargeVec&lt;int&gt; &amp;surface_indicator_;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;            <a class="code" hr