[Simon1303]

<p>Hello friends,</p>

<p> i want to simulate filling a tank(0.3 Litres) in 3 D with hydrogen with a defined mass flow (real gas hydrogen). I want to see how the temperature and pressure increase. My problem is the wall temperature do not change. In mesh i did a manual contact region and so my wall should be connectet to my fluid (hydrogen). I did that simulation in 2D and my wall temperature did change.</p>

<p>Maybe the problem is because i patched my wall temperature to 293K? But why did the wall temp. change then in 2D (also manual contact in mesh)? i also didnt do shared topology or built from the 2 cylinders(wall body and fluid body) 1 part.</p>

<p>Do u also can tell me if my simulation does make sense? Only after 2 seconds my temperature went from 256K to 400K and from 1 bar to 38 bar (temperature do not increase any more really). I could explain to myseld because of the &quot;high&quot; mass flow and the &quot;low&quot; volume from the tank. Is it normal that the temp goes straight to the back of the tank?</p>

<p>My conditions:</p>

<p>m_H2_flow=0.8 g/s, T_H2=256K k-eps, enery eq. on</p>

<p>op. cond 1bar (floating cond. on), timestep size 0.05, iterations 35, free steam 293K and 10 W/m&sup2;K</p>

<p>Patch: wall temp_293K</p>

<p></p>

<p> Thanks in advance</p>