A novel high-order projection method is presented in this study for the simulation of incompressible turbulent flows, utilising weighted essentially non-oscillatory (WENO) schemes. Spatial discreti...
{"title":"High-Order WENO-based Semi-Implicit Projection Method for Incompressible Turbulent Flows: Development, Accuracy, and Reynolds Number Effects","authors":"Thi Quynh Nguyen, Hyung Taek Ahn, Christos Kavouklis","doi":"10.1080/10618562.2023.2289445","DOIUrl":"https://doi.org/10.1080/10618562.2023.2289445","url":null,"abstract":"A novel high-order projection method is presented in this study for the simulation of incompressible turbulent flows, utilising weighted essentially non-oscillatory (WENO) schemes. Spatial discreti...","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"28 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139374187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-03DOI: 10.1080/10618562.2023.2297944
Vinod Kumar Srinivasa, Subhaschandra Kattimani, Ganga Reddy C.
Computational fluid dynamics (CFD) is used to analyze the jet interaction of side-vent and gaspers and their influence on cough jets in aircraft cabins. A control device is designed and proposed to...
{"title":"Numerical Investigation of Gasper Air Jet Dynamics in an Aircraft Cabin","authors":"Vinod Kumar Srinivasa, Subhaschandra Kattimani, Ganga Reddy C.","doi":"10.1080/10618562.2023.2297944","DOIUrl":"https://doi.org/10.1080/10618562.2023.2297944","url":null,"abstract":"Computational fluid dynamics (CFD) is used to analyze the jet interaction of side-vent and gaspers and their influence on cough jets in aircraft cabins. A control device is designed and proposed to...","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139082858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1080/10618562.2023.2181958
M. R. Nived, Poreddy Pavan Kumar Reddy, Vinayak Eswaran
Implicit solvers based on the lower-upper symmetric Gauss–Seidel (LUSGS) method are widely used in Computational Fluid Dynamics (CFD) codes to obtain steady-state solutions using large false-transi...
{"title":"Time-Accurate Solution of Unsteady Flows in an Implicit Solver Using Block LUSGS Method","authors":"M. R. Nived, Poreddy Pavan Kumar Reddy, Vinayak Eswaran","doi":"10.1080/10618562.2023.2181958","DOIUrl":"https://doi.org/10.1080/10618562.2023.2181958","url":null,"abstract":"Implicit solvers based on the lower-upper symmetric Gauss–Seidel (LUSGS) method are widely used in Computational Fluid Dynamics (CFD) codes to obtain steady-state solutions using large false-transi...","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"78 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139082548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1080/10618562.2023.2195642
Kavan M. Prabtani, Rajesh Ranjan
An accurate prediction of the flowfield inside the scramjet inlet/isolator is crucial for a stable and reliable aerodynamic design. However, the complex phenomena such as shock wave-expansion wave ...
{"title":"Turbulence Modelling for SWTBLI with Expansion Wave Interference Inside Scramjet Inlets","authors":"Kavan M. Prabtani, Rajesh Ranjan","doi":"10.1080/10618562.2023.2195642","DOIUrl":"https://doi.org/10.1080/10618562.2023.2195642","url":null,"abstract":"An accurate prediction of the flowfield inside the scramjet inlet/isolator is crucial for a stable and reliable aerodynamic design. However, the complex phenomena such as shock wave-expansion wave ...","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"18 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139065182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1080/10618562.2023.2178647
Yue Zhang, Xing Ji, Kun Xu
This paper extends the high-order compact gas-kinetic scheme (CGKS) to flow simulations on a rotating coordinate frame. The kinetic equation with the inclusion of centrifugal and Coriolis accelerat...
{"title":"A High-Order Compact Gas-Kinetic Scheme in a Rotating Coordinate Frame and on Sliding Mesh","authors":"Yue Zhang, Xing Ji, Kun Xu","doi":"10.1080/10618562.2023.2178647","DOIUrl":"https://doi.org/10.1080/10618562.2023.2178647","url":null,"abstract":"This paper extends the high-order compact gas-kinetic scheme (CGKS) to flow simulations on a rotating coordinate frame. The kinetic equation with the inclusion of centrifugal and Coriolis accelerat...","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"10 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1080/10618562.2023.2230897
Keshav S. Malagi, Nischay R. Mamidi, Nemili Anil, Vasudev Ramesh, Suresh M. Deshpande
The gradient based optimisation algorithms combined with the finite volume or element based adjoint approaches have been very successful in aerodynamic shape optimization (ASO). The meshfree least ...
{"title":"Adjoint Based Aerodynamic Shape Optimisation Using Kinetic Meshfree Method","authors":"Keshav S. Malagi, Nischay R. Mamidi, Nemili Anil, Vasudev Ramesh, Suresh M. Deshpande","doi":"10.1080/10618562.2023.2230897","DOIUrl":"https://doi.org/10.1080/10618562.2023.2230897","url":null,"abstract":"The gradient based optimisation algorithms combined with the finite volume or element based adjoint approaches have been very successful in aerodynamic shape optimization (ASO). The meshfree least ...","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"28 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139094159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-05DOI: 10.1080/10618562.2023.2289440
Jingkui Li, Binjie Qu, Yuming Qian, Zhibin Liu, Zhandong Li
The identification of the flow pattern within the bearing chamber's oil and gas two-phase flow is crucial for its lubrication design. Aiming at the lack of accuracy and universality of the current ...
轴承腔内油气两相流流态的识别对其润滑设计至关重要。针对目前…
{"title":"Identification of Oil and Gas Two-Phase Flow Patterns in Aero-Engine Bearing Chambers Based on Kriging Method","authors":"Jingkui Li, Binjie Qu, Yuming Qian, Zhibin Liu, Zhandong Li","doi":"10.1080/10618562.2023.2289440","DOIUrl":"https://doi.org/10.1080/10618562.2023.2289440","url":null,"abstract":"The identification of the flow pattern within the bearing chamber's oil and gas two-phase flow is crucial for its lubrication design. Aiming at the lack of accuracy and universality of the current ...","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"59 ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138505831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1080/10618562.2023.2285330
Anubhav Joshi, Alexandros Papados, Rakesh Kumar
In this work, we have employed physics-informed neural networks (PINNs) to solve a few fluid dynamics problems at low and high speeds, with a focus on the latter. For high-speed fluid dynamics prob...
{"title":"Investigation of Low and High-Speed Fluid Dynamics Problems Using Physics-Informed Neural Network","authors":"Anubhav Joshi, Alexandros Papados, Rakesh Kumar","doi":"10.1080/10618562.2023.2285330","DOIUrl":"https://doi.org/10.1080/10618562.2023.2285330","url":null,"abstract":"In this work, we have employed physics-informed neural networks (PINNs) to solve a few fluid dynamics problems at low and high speeds, with a focus on the latter. For high-speed fluid dynamics prob...","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"45 10","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138505832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel shock sensor based on image segmentation is proposed for flows with shock or detonation waves. It consists of a function computed based on the numerical Schliren formulation, which is the absolute value of the density gradient. A fast segmentation technique is applied to the sensor function to determine the threshold of the sensor. The candidate troubled cells detected via the computed threshold are further filtered by a Ducros sensor and multiresolution analysis to exclude turbulent zones from the troubled cells. The proposed sensor is applied to a finite difference hybrid scheme, tested for several cases, and compared with other sensors, namely the Ducros sensor, the multiresolution analysis, and WENO- and TENO-based sensors. The results show that the proposed sensor detects the shock and detonation waves more accurately than the other sensors with fewer cells and reduces the computational time of the hybrid scheme.
{"title":"A Shock Sensor Based on Image Segmentation with Application to a Hybrid Central/WENO Scheme","authors":"Nasreddine Bouguellab, Smail Khalfallah, Boubakr Zebiri, Nassim Brahmi","doi":"10.1080/10618562.2023.2267484","DOIUrl":"https://doi.org/10.1080/10618562.2023.2267484","url":null,"abstract":"A novel shock sensor based on image segmentation is proposed for flows with shock or detonation waves. It consists of a function computed based on the numerical Schliren formulation, which is the absolute value of the density gradient. A fast segmentation technique is applied to the sensor function to determine the threshold of the sensor. The candidate troubled cells detected via the computed threshold are further filtered by a Ducros sensor and multiresolution analysis to exclude turbulent zones from the troubled cells. The proposed sensor is applied to a finite difference hybrid scheme, tested for several cases, and compared with other sensors, namely the Ducros sensor, the multiresolution analysis, and WENO- and TENO-based sensors. The results show that the proposed sensor detects the shock and detonation waves more accurately than the other sensors with fewer cells and reduces the computational time of the hybrid scheme.","PeriodicalId":56288,"journal":{"name":"International Journal of Computational Fluid Dynamics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135888149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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