 &amp;contact_relation)</div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;                : <a class="code" href="class_pressure_force_type.html">PressureForceType</a>(contact_relation), viscous_force_(contact_relation),</div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;                  viscous_force_from_fluid_(*this-&gt;particles_-&gt;template getVariableByName&lt;Vecd&gt;(<span class="stringliteral">&quot;ViscousForceFromFluid&quot;</span