The impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated duct
This computational investigation primarily explores the impact of three factors on thermo-hydraulic performance: the dimensionless distance ratio (z/L = −0.1 to 0.5), Heated Surface [HS] orientation (HS-Up, HS-Down), and Delta Winglet [DW] positioning (DW-PU, DW-PD). The numerical model applies stea...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
|
| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25003351 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850043079522779136 |
|---|---|
| author | Hüseyin Zahit Demirağ |
| author_facet | Hüseyin Zahit Demirağ |
| author_sort | Hüseyin Zahit Demirağ |
| collection | DOAJ |
| description | This computational investigation primarily explores the impact of three factors on thermo-hydraulic performance: the dimensionless distance ratio (z/L = −0.1 to 0.5), Heated Surface [HS] orientation (HS-Up, HS-Down), and Delta Winglet [DW] positioning (DW-PU, DW-PD). The numerical model applies steady-state RANS and energy equations with the (SST) k-ω turbulence model, assuming incompressibility, constant thermophysical properties, and ignoring radiation and buoyancy effects. A comprehensive analysis of resulting data reveals that the DW-PD configuration yields lower Darcy friction factors across all z/L ratios compared to DW-PU layout, exhibiting reductions of 6.35 % at z/L = −0.1 and 3.49 % at z/L = 0.5. The DW-PD setup with HS-Down demonstrates the best thermal performance among all configurations and dimensionless distance ratios (except z/L = −0.1). Moreover, the optimum dimensionless distance ratios for achieving the highest Nusselt numbers are determined as z/L = 0.1 for HS-Up and z/L = 0.2 for HS-Down under both configurations. The computational data indicates that the difference between the maximum and minimum Thermal Enhancement Factor [TEF] is approximately 23.78 % and the highest TEF = 1.25, is achieved with the utilization of DW-PD at z/L = 0.2 for HS-Down at Re = 5000. This study underscores the critical significance of examining all these parameters to attain the highest thermal performance. |
| format | Article |
| id | doaj-art-36ff9f5e7b3c42868c4ddaf4cec20317 |
| institution | DOAJ |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-36ff9f5e7b3c42868c4ddaf4cec203172025-08-20T02:55:20ZengElsevierCase Studies in Thermal Engineering2214-157X2025-06-017010607510.1016/j.csite.2025.106075The impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated ductHüseyin Zahit Demirağ0Department of Mechanical Engineering, Yozgat Bozok University, 66200, Yozgat, TürkiyeThis computational investigation primarily explores the impact of three factors on thermo-hydraulic performance: the dimensionless distance ratio (z/L = −0.1 to 0.5), Heated Surface [HS] orientation (HS-Up, HS-Down), and Delta Winglet [DW] positioning (DW-PU, DW-PD). The numerical model applies steady-state RANS and energy equations with the (SST) k-ω turbulence model, assuming incompressibility, constant thermophysical properties, and ignoring radiation and buoyancy effects. A comprehensive analysis of resulting data reveals that the DW-PD configuration yields lower Darcy friction factors across all z/L ratios compared to DW-PU layout, exhibiting reductions of 6.35 % at z/L = −0.1 and 3.49 % at z/L = 0.5. The DW-PD setup with HS-Down demonstrates the best thermal performance among all configurations and dimensionless distance ratios (except z/L = −0.1). Moreover, the optimum dimensionless distance ratios for achieving the highest Nusselt numbers are determined as z/L = 0.1 for HS-Up and z/L = 0.2 for HS-Down under both configurations. The computational data indicates that the difference between the maximum and minimum Thermal Enhancement Factor [TEF] is approximately 23.78 % and the highest TEF = 1.25, is achieved with the utilization of DW-PD at z/L = 0.2 for HS-Down at Re = 5000. This study underscores the critical significance of examining all these parameters to attain the highest thermal performance.http://www.sciencedirect.com/science/article/pii/S2214157X25003351Solar air heaterHeat transfer enhancementHeated surface positioningVortex generator configurationComputational assessment |
| spellingShingle | Hüseyin Zahit Demirağ The impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated duct Case Studies in Thermal Engineering Solar air heater Heat transfer enhancement Heated surface positioning Vortex generator configuration Computational assessment |
| title | The impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated duct |
| title_full | The impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated duct |
| title_fullStr | The impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated duct |
| title_full_unstemmed | The impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated duct |
| title_short | The impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated duct |
| title_sort | impact of vortex generator positioning and heated surface orientation on thermal performance and flow dynamics in asymmetrically heated duct |
| topic | Solar air heater Heat transfer enhancement Heated surface positioning Vortex generator configuration Computational assessment |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25003351 |
| work_keys_str_mv | AT huseyinzahitdemirag theimpactofvortexgeneratorpositioningandheatedsurfaceorientationonthermalperformanceandflowdynamicsinasymmetricallyheatedduct AT huseyinzahitdemirag impactofvortexgeneratorpositioningandheatedsurfaceorientationonthermalperformanceandflowdynamicsinasymmetricallyheatedduct |