|
[Sponsors] |
August 29, 2013, 15:33 |
Multiphase flow with species transport
|
#1 |
New Member
Join Date: Jul 2013
Posts: 2
Rep Power: 0 |
I am new to CFD and am attempting to quickly learn how to numerically model my physical experiments.
I am attempting to model a saline density current which develops from a lock-exchange mechanism and flows into ambient, fresh water. My 3D domain includes a downstream reach and an upstream reach with an interface connecting the two. Initially, I will have dense, saline in the upstream reach, and fresh water in the downstream reach. Models in use: VOF, LES, Species. I have created a material (salt) and have 2 phases (fresh water, and fresh water + salt). That is, my primary phase (fresh water) is only fresh water, and my secondary phase has two species (fresh water and salt). After initializing my solution, I patch the following: -volume fraction of secondary phase (saline) to 1 for upstream zone. -volume fraction of secondary phase to 0 for downstream zone. -salt mass concentration to 0.035 for the upstram zone. I would expect from this that the initial density of the upstream zone be greater than that of the downstream zone. However, I find that the initial downstream zone density is correct (998.2 kg/m3), but the upstream zone has a very low initial density which changes if I change the patched mass concentration. Any ideas of why this may be happening? Any help for this beginner would be greatly appreciated. |
|
Tags |
density current, fluent, multiphase, species transport, vof |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
questions about species transport through walls | shuqin | FLUENT | 13 | April 9, 2014 03:42 |
Questions for a species transport problems (snapshots attached) | aleisia | FLUENT | 2 | October 9, 2011 05:40 |
Some quiestions on multiphase flow | fjalil | CFX | 4 | June 17, 2009 13:32 |
multiphase flow ,phoenics user forum | ismail | Phoenics | 0 | October 23, 2008 20:26 |
Multiphase flow for flow around ship | gundul | CFX | 5 | September 2, 2008 17:06 |