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Showing results 1 to 7 of 7 Search took 0.00 seconds. Search: Posts Made By: ghorrocks

Forum: CFX September 8, 2015, 19:54

Replies: 13 Negative absolute pressure Views: 13,347 Posted By ghorrocks I was referring to simpler EOS relations such as... I was referring to simpler EOS relations such as ideal gas. I am no expert on these types of EOS, but this link (http://www.soest.hawaii.edu/oceanography/faculty/yhli/1967a.pdf) suggests the Tait...

Forum: CFX September 6, 2015, 05:57

Replies: 13 Negative absolute pressure Views: 13,347 Posted By ghorrocks Incompressible flows can have negative pressure... Incompressible flows can have negative pressure as the pressure does not contribute to the equation of state. The comments I made are referring to compressible flows. You last comment seem to...

Forum: CFX September 5, 2015, 18:46

Replies: 13 Negative absolute pressure Views: 13,347 Posted By ghorrocks The numerics of every CFD code I am aware of does... The numerics of every CFD code I am aware of does not allow negative pressures. The physical model breaks down. I am aware that in some very specific circumstances negative absolute pressures do...

Forum: CFX January 1, 2015, 04:02

Replies: 13 Negative absolute pressure Views: 13,347 Posted By ghorrocks I cannot keep track of every conversation on the... I cannot keep track of every conversation on the forum. If another thread is relevant then put a link to it in your post. Can you explain in your case why the water does not cavitate when the...

Forum: CFX December 31, 2014, 17:09

Replies: 13 Negative absolute pressure Views: 13,347 Posted By ghorrocks You cannot have negative pressures in CFX for... You cannot have negative pressures in CFX for compressible flow. The whole compressible flow mathematical framework breaks down - it implies negative density as well. It is also quite likely that...

Forum: CFX December 31, 2014, 05:44

Replies: 13 Negative absolute pressure Views: 13,347 Posted By ghorrocks If this simulation is incompressible then simply... If this simulation is incompressible then simply raise the reference pressure so you do not have negative pressures. If the simulation is compressible (or has something the function of absolute...

Forum: CFX September 8, 2012, 07:17

Replies: 13 Negative absolute pressure Views: 13,347 Posted By ghorrocks Negative absolute pressure usually means that the... Negative absolute pressure usually means that the liquid will cavitate and this will eliminate the negative pressure. However negative absolute pressure is physically possible - cavitation takes...

Showing results 1 to 7 of 7

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