Predicting Unsteady Flow Parameters in a Subsonic Air Diffuser Using MacCormack’s Explicit Method
A numerical procedure is presented to predict the flow characteristics inside a subsonic diffuser by solving Navier-Stokes' equations, using MacCormack’s explicit method. The flow is assumed to be viscous, compressible, unsteady and two-dimensional. The grid model suggested for the diffuser ha...
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| Format: | Article |
| Language: | English |
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Wasit University
2019-04-01
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| Series: | Wasit Journal of Engineering Sciences |
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| Online Access: | https://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/109 |
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| author | Tawfeeq Wasmi M. Salih |
| author_facet | Tawfeeq Wasmi M. Salih |
| author_sort | Tawfeeq Wasmi M. Salih |
| collection | DOAJ |
| description |
A numerical procedure is presented to predict the flow characteristics inside a subsonic diffuser by solving Navier-Stokes' equations, using MacCormack’s explicit method. The flow is assumed to be viscous, compressible, unsteady and two-dimensional. The grid model suggested for the diffuser has 20 points in the horizontal direction and 30 points in the vertical direction. The numerical solution has shown reasonable results with a 2D variation of flow properties inside the diffuser and the steady state solution can be satisfied by 600-900 loops only. The obtained results of the present study are compared with those obtained by using a numerical code of National Project for Application-oriented Research in CFD (NPARC) as well as those obtained from a previous experimental study and give an acceptable range of errors (about ± 15%).
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| format | Article |
| id | doaj-art-0b2986c893d2476a84fcf183d0168153 |
| institution | DOAJ |
| issn | 2305-6932 2663-1970 |
| language | English |
| publishDate | 2019-04-01 |
| publisher | Wasit University |
| record_format | Article |
| series | Wasit Journal of Engineering Sciences |
| spelling | doaj-art-0b2986c893d2476a84fcf183d01681532025-08-20T03:20:40ZengWasit UniversityWasit Journal of Engineering Sciences2305-69322663-19702019-04-017110.31185/ejuow.Vol7.Iss1.109Predicting Unsteady Flow Parameters in a Subsonic Air Diffuser Using MacCormack’s Explicit MethodTawfeeq Wasmi M. Salih0Al-Mustansiriyah University, Materials Engineering Department A numerical procedure is presented to predict the flow characteristics inside a subsonic diffuser by solving Navier-Stokes' equations, using MacCormack’s explicit method. The flow is assumed to be viscous, compressible, unsteady and two-dimensional. The grid model suggested for the diffuser has 20 points in the horizontal direction and 30 points in the vertical direction. The numerical solution has shown reasonable results with a 2D variation of flow properties inside the diffuser and the steady state solution can be satisfied by 600-900 loops only. The obtained results of the present study are compared with those obtained by using a numerical code of National Project for Application-oriented Research in CFD (NPARC) as well as those obtained from a previous experimental study and give an acceptable range of errors (about ± 15%). https://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/109Subsonic flowCFDFluid mechanics |
| spellingShingle | Tawfeeq Wasmi M. Salih Predicting Unsteady Flow Parameters in a Subsonic Air Diffuser Using MacCormack’s Explicit Method Wasit Journal of Engineering Sciences Subsonic flow CFD Fluid mechanics |
| title | Predicting Unsteady Flow Parameters in a Subsonic Air Diffuser Using MacCormack’s Explicit Method |
| title_full | Predicting Unsteady Flow Parameters in a Subsonic Air Diffuser Using MacCormack’s Explicit Method |
| title_fullStr | Predicting Unsteady Flow Parameters in a Subsonic Air Diffuser Using MacCormack’s Explicit Method |
| title_full_unstemmed | Predicting Unsteady Flow Parameters in a Subsonic Air Diffuser Using MacCormack’s Explicit Method |
| title_short | Predicting Unsteady Flow Parameters in a Subsonic Air Diffuser Using MacCormack’s Explicit Method |
| title_sort | predicting unsteady flow parameters in a subsonic air diffuser using maccormack s explicit method |
| topic | Subsonic flow CFD Fluid mechanics |
| url | https://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/109 |
| work_keys_str_mv | AT tawfeeqwasmimsalih predictingunsteadyflowparametersinasubsonicairdiffuserusingmaccormacksexplicitmethod |