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IDProjectCategoryView StatusLast Update
0003977OpenFOAMBugpublic2023-04-29 21:48
Reporterdemichie Assigned Tohenry  
Status resolvedResolutionfixed 
PlatformUnixOSOtherOS Version(please specify)
Product Versiondev 
Fixed in Versiondev 
Summary0003977: volume fraction of dispersed phase in drag model Ergun
DescriptionThe definition of CdRe for the Ergun drag model is correct only for one dispersed phase, and wrong for more than one.
In lines 67-75 of Ergun.C it is computed as

           *max(1 - continuous, dispersed.residualAlpha())
           /max(continuous, continuous.residualAlpha())
          + 1.75

The numerator of the fraction in the first term of the sum should be the volumetric fraction of the dispersed phase, which is different from (1-continuous) when there are multiple dispersed phases.
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2023-04-29 21:48

manager   ~0013007

Resolved by commit 4c68b4bf5b5a809d2c9e41b2123f3bc89a1f0e40

Issue History

Date Modified Username Field Change
2023-04-29 19:26 demichie New Issue
2023-04-29 21:48 henry Assigned To => henry
2023-04-29 21:48 henry Status new => resolved
2023-04-29 21:48 henry Resolution open => fixed
2023-04-29 21:48 henry Fixed in Version => dev
2023-04-29 21:48 henry Note Added: 0013007