Determination of the discharge coefficient through vent driven by a non-Boussinesq plume in an emptying filling box
The effect of high buoyancy forces due to density contrast between the fluids on either side of the vent on the discharge coefficient Cd is taken into account in the laboratory. Salt water experiments are conducted at small scale in a large fresh water tank with saline to generate buoyancy force. In...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2022-01-01
|
| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2022/23/e3sconf_roomvent2022_04021.pdf |
| _version_ | 1817995780202430464 |
|---|---|
| author | Liu Yang Huang Zhongwei Huang Lan |
| author_facet | Liu Yang Huang Zhongwei Huang Lan |
| author_sort | Liu Yang |
| collection | DOAJ |
| description | The effect of high buoyancy forces due to density contrast between the fluids on either side of the vent on the discharge coefficient Cd is taken into account in the laboratory. Salt water experiments are conducted at small scale in a large fresh water tank with saline to generate buoyancy force. In non-Boussinesq cases, a larger discharge parameter Γd at the vent may make plume-like flow contract further with a smaller value of the discharge coefficient. A nearly twofold time in the non-dimensional form for draining light fluid fully out of the space is observed comparing with time predicted with a constant value of Cd = 0.6 for simple draining flows. A displacement flow theoretical model with virtual source correction at the initial position of an internal source is developed to reveal a time-dependent movement of the layer interface, and the oscillatory amplitude of the interface overshooting during the transient period is found to depend on the two dimensionless geometrical parameters Λ and Θ. |
| first_indexed | 2024-04-14T02:10:58Z |
| format | Article |
| id | doaj.art-ff279657c5c24e7b9dd36d13b86f9584 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-04-14T02:10:58Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-ff279657c5c24e7b9dd36d13b86f95842022-12-22T02:18:25ZengEDP SciencesE3S Web of Conferences2267-12422022-01-013560402110.1051/e3sconf/202235604021e3sconf_roomvent2022_04021Determination of the discharge coefficient through vent driven by a non-Boussinesq plume in an emptying filling boxLiu YangHuang ZhongweiHuang LanThe effect of high buoyancy forces due to density contrast between the fluids on either side of the vent on the discharge coefficient Cd is taken into account in the laboratory. Salt water experiments are conducted at small scale in a large fresh water tank with saline to generate buoyancy force. In non-Boussinesq cases, a larger discharge parameter Γd at the vent may make plume-like flow contract further with a smaller value of the discharge coefficient. A nearly twofold time in the non-dimensional form for draining light fluid fully out of the space is observed comparing with time predicted with a constant value of Cd = 0.6 for simple draining flows. A displacement flow theoretical model with virtual source correction at the initial position of an internal source is developed to reveal a time-dependent movement of the layer interface, and the oscillatory amplitude of the interface overshooting during the transient period is found to depend on the two dimensionless geometrical parameters Λ and Θ.https://www.e3s-conferences.org/articles/e3sconf/pdf/2022/23/e3sconf_roomvent2022_04021.pdf |
| spellingShingle | Liu Yang Huang Zhongwei Huang Lan Determination of the discharge coefficient through vent driven by a non-Boussinesq plume in an emptying filling box E3S Web of Conferences |
| title | Determination of the discharge coefficient through vent driven by a non-Boussinesq plume in an emptying filling box |
| title_full | Determination of the discharge coefficient through vent driven by a non-Boussinesq plume in an emptying filling box |
| title_fullStr | Determination of the discharge coefficient through vent driven by a non-Boussinesq plume in an emptying filling box |
| title_full_unstemmed | Determination of the discharge coefficient through vent driven by a non-Boussinesq plume in an emptying filling box |
| title_short | Determination of the discharge coefficient through vent driven by a non-Boussinesq plume in an emptying filling box |
| title_sort | determination of the discharge coefficient through vent driven by a non boussinesq plume in an emptying filling box |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2022/23/e3sconf_roomvent2022_04021.pdf |
| work_keys_str_mv | AT liuyang determinationofthedischargecoefficientthroughventdrivenbyanonboussinesqplumeinanemptyingfillingbox AT huangzhongwei determinationofthedischargecoefficientthroughventdrivenbyanonboussinesqplumeinanemptyingfillingbox AT huanglan determinationofthedischargecoefficientthroughventdrivenbyanonboussinesqplumeinanemptyingfillingbox |