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January 30, 2016, 14:08 |
Liquid-Vapor Ejector Modeling
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#1 |
New Member
hamed
Join Date: Aug 2015
Posts: 5
Rep Power: 11 |
Hi guys! im modeling ejector in two phase fluid which primary fluid is Liquid Ammonia and Secondary One is Vapor Ammonia. I defined the boundary condition as Pressure inlet (9Mpa) for primary inlet and also Pressure inlet for Secondary inlet (1.2Mpa) and Pressure outlet as (1.5Mpa) for outlet of the ejector. my problem is when i use constant pressure for secondary inlet which is smaller amount than pressure outlet i face with REVERSE FLOW from outlet to secondary inlet and i got negative mass flow rate in results. please help me if you know the solution my friends!!!!!!!!!!! i got CRAZY of that problem!!!!!!!!
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March 9, 2016, 11:55 |
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#2 |
New Member
Join Date: Jun 2015
Location: Turin Italy
Posts: 3
Rep Power: 11 |
your settings may be corrected to converge the calculation but the reverse flow is more likely to depend on the geometry. Simply put the ejector is not performing
An ejector has to work with the pressure in the lower inlet of the discharge otherwise the ejector serves not |
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March 10, 2016, 05:12 |
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#3 | |
New Member
hamed
Join Date: Aug 2015
Posts: 5
Rep Power: 11 |
Quote:
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October 14, 2016, 01:43 |
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#4 |
New Member
Khalid
Join Date: Oct 2016
Posts: 1
Rep Power: 0 |
Hamed,
Did you solve your problem? I have the same problem now. |
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April 10, 2017, 23:04 |
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#5 |
New Member
July
Join Date: Mar 2017
Location: Philippines
Posts: 3
Rep Power: 9 |
Hi. I have more or less the same simulation problem too. I did not have that problem. The problem i have is that the solution won't converge nor it diverge. I used simplec coupling. Second order upwing for discretization except volume fraction which is quick. No UDF.
Last edited by lokooko65@gmail.com; April 11, 2017 at 00:48. |
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Tags |
ejector modeling |
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