Hi,
I'm currently trying to study shock tube analysis on fluent and I have modelled a shock tube with a driver section (high-pressure) and a driven section (low pressure). What I want to study is the effect of the length and the effect of the diameter of the shock tube on temperature and pressure inside the tube. It all goes well when both the driver and driven sections are modelled as air but what I am trying to model is 2 different gases, hydrogen in the driver section and air in the driven section with an open end to the atmosphere. So basically I am trying to model a reservoir with hydrogen that has a sudden release into the atmosphere and I want to see what happens inside the tube, pressure and temperature-wise but I can't seem to get it to work, can someone help me?
Dear @Tomas,
You can always patch the initial solution in both the section with the required initial conditions to start with. However you have not described the problem associated. What is exact error you are getting.
Dear Syed Mughees Ali ,
The problem is that, I have a 2D rectangle with face split to give me a driver section and a driven section and I am using transient and density based but when I initialize with 2 different gases in the 2 sections, fluent seems to complicate and the results come out inconclusive.
Dear Tomas Costa ,
I might be the case that a sharp gradient is created between the interface of the two gases leading to divergence. You can try by defining a thin mixing layer a the interface during initializing. However, the source of the exact problem can only be known after knowing the complete procedure and geometry.
- Badges
- Science topic