how to limit the min/max range of hyd' head in all nodes?

<p>Hello, I am using a 2D unsaturated model with the pFreeze plug-in. I use a time series of fluid flow as upper boundary condition. While runnung, the model hydraulic head values reach unreasonably high and low head values (~ 1e-9 m).&#160;It is probably a bug that is related to the pFreeze plug-in. As a way around it, is there a way to constrain min/max head values in all the model nodes?&amp;amp;lt;/strong&amp;amp;gt; I tried aplying a min/max boundary condition to all nodes, and also an 'if, else, end' condition in the 'Current expression'. Nothing works. Does anyone have an idea how to limit the min/max range of hyd' head in all nodes?&#160;Thanks in adnance,&#160;Matan.</p>

Hi Matan,<br> We are not aware about a bug in piFreeze. But to me this sounds to the following problem: piFreeze will simulate the freezing conditions and therefore, it will change the conductivity and others. If the Fluid-Flux BC on the top boundary is not adjusted, then the amount of fluid could be excessive for the low conductivity values (let's say frozen conditions).<br> In general, you can always set a min./max. hydraulic-head constraint to the nodes associated to the Fluid-Flux BC.<br> Cheers<br> Carlos

Thank you Carlos for your answer,<br> I did not set the&#160;min./max. hydraulic-head constraint correctly and it works fine now.<br> <br> Matan