|
[Sponsors] |
Exporting results and Mach number calculation |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
July 14, 2010, 13:05 |
Exporting results and Mach number calculation
|
#1 |
New Member
Pawan Kumar
Join Date: Apr 2010
Posts: 15
Rep Power: 16 |
Good afternoon. A few quick questions, nothing life-threatening but was interested to know if anyone had any insight.
1) Mach number. The speed sound as per CFX is calculated using I am using air ideal gas. Pressure, I have set the reference pressure as 5500 pascal (such that for my problem the relative static pressure is 0, hence my total/absolute pressure is 5500). Gamma is 1.4. How does CFX calculate from the molar mass (kg /kmol ) ? In fluent, i used to set the Mach number to what I wanted (around 6) and it gave me a corresponding velocity it used to initialize the problem. The same velocity, when input into CFX gave me a free stream mach (I found from my results) closer to 7. I did a simple interpolation and figured out my new velocity and am running at the desired mach now but I am still curious. 2) Exporting results. I am exporting to cgns. My domain has about 5 boundaries (2 inlets, 1 outlet, 1 wall, 1 sym plane). When I export, is it possible to export just the results of the symmetry plane instead of all the boundaries? The "export boundary values only" solves half the problem (I think) in that it only exports the boundary information, not the vast fluid domain inside. But still the results file (that includes all 80 transient timesteps) is enormous, on the order of a couple gigs. It would really really help if I could export just the sym plane solution. Thanks for the help |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
mach number and selection of the fluent solver | turbinesv | FLUENT | 4 | April 24, 2011 00:14 |
Strong oscillation at transonic mach number | martingariepy | FLUENT | 2 | May 12, 2009 11:40 |
mach number and CFX 11.0 solver | turbinesv | CFX | 5 | January 5, 2009 05:43 |
Mach number in Post processor | Ramu Maddi | CFX | 3 | August 17, 2007 10:06 |
non-dimensional analysis in Fluent | Endee | FLUENT | 8 | September 7, 2005 16:16 |