Article
Engineering, Aerospace
Xiaokai Sun, Hang Ni, Wei Peng, Peixue Jiang, Yinhai Zhu
Summary: This study compared the effects of shock wave impingement in different regions and found that upstream impingement led to more severe cooling performance degradation, while increasing the coolant inlet Mach number was beneficial for improving cooling effectiveness.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Engineering, Aerospace
Hang Ni, Mingjun Wang, Peixue Jiang, Wei Peng, Yinhai Zhu
Summary: This study presents a segmented cooling-stream injection structure and investigates its effect on supersonic film cooling. The results demonstrate that segmented cooling-stream injection can reduce the mixing between the mainstream and the cooling stream, particularly with helium as the coolant. However, the cooling effect of segmented injection is similar to single injection when using nitrogen as the coolant.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Thermodynamics
V. Kotebavi, S. G. Rakesh
Summary: This study investigates the supersonic flow characteristics of circular and elliptic cones at different angles of attack. The results show that elliptic cones generate higher lift compared to circular cones, especially with higher ellipticity ratios. Additionally, as the angle of attack increases, shock waves appear on the surface of the cones.
JOURNAL OF APPLIED FLUID MECHANICS
(2023)
Article
Thermodynamics
Qiang Fu, Longqing Lei, Wei Chen, Zhong Ren, Guozhong He, Chi Liu
Summary: This study investigates the influence of mainstream Mach numbers on film cooling performance under supersonic mainstream conditions using numerical simulations. The results show that the film cooling effectiveness improves as the mainstream Mach number increases, with the weakening of the vertical diffusion and the increase in the spanwise dimension of the primary counter-rotating vortex pairs (PCVP), leading to better film flow adhesion and coverage.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Mechanics
Kuangshi Chen, Jinglei Xu, Qihao Qin, Shuai Huang
Summary: Supersonic axisymmetric expansion flow is an important issue in gas dynamics, especially for the design and evaluation of supersonic/hypersonic vehicles and their propulsion systems. This study focuses on developing an analytical solution for the supersonic axisymmetric flow around a sharp convex corner, which is currently only available through computational fluid dynamics.
Article
Engineering, Mechanical
Alfonso Guilarte Herrero, Akito Noguchi, Kensuke Kusama, Tsuyoshi Shigeta, Takayuki Nagata, Taku Nonomura, Keisuke Asai
Summary: This study evaluated the influence of a corrugation on flow structures and aerodynamics under compressible low Reynolds number conditions, comparing it to a simpler flat plate model. The results showed that the corrugated model performed better at low Reynolds numbers due to accelerated boundary layer transition and pressure recovery, reducing flow separation.
EXPERIMENTS IN FLUIDS
(2021)
Article
Mechanics
Arun Kumar Perumal, Ethirajan Rathakrishnan
Summary: The experimental investigation on the acoustic properties of supersonic jets reveals scaling laws for the average shock-cell length and supersonic core length, providing important insights into parameter selection and noise control in supersonic flow.
Article
Engineering, Mechanical
Chung-Gang Li, Rahul Bale, WeiHsiang Wang, Makoto Tsubokura
Summary: In this study, a sharp interface immersed boundary method (IBM) for low Mach number viscous compressible flows is developed. The IBM utilizes a robust interpolation scheme to ensure stability for complex geometries with zero-thickness walls. By gradually reducing the order of interpolation near the wall, the method eliminates interaction between opposite sides in high order schemes. It also efficiently handles moving objects in compressible flows without requiring any special treatment. The method has been successfully applied to aerodynamic simulations, compression and expansion processes, and aeroacoustics simulations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Thermodynamics
Hongyu Gao, Xueying Li, Jing Ren, Hongde Jiang
Summary: This study investigates the effects of leakage flow on cascade endwall cooling performance for high subsonic flow conditions. The optimal performance is observed at a blowing ratio of around 1.7.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Engineering, Aerospace
Karthikeyan Natarajan, Rajan Kumar
Summary: Experimental investigation of supersonic flow over a wall-mounted hemisphere revealed unique features distinct from other wall-mounted blunt bodies, with the triple point of the lambda-shock structure forming ahead of the hemisphere due to the interaction between the separation shock and the bow shock. The excursion of the triple point on the hemisphere correlated closely with the movement of the separation shock rather than the bow shock, with strong vortex structures forming at the foot of the reattachment bow shock repetitively and convecting over the hemisphere. Unsteady pressure measurements provided valuable insights on flow unsteadiness distribution over the hemisphere.
Article
Thermodynamics
Xiao Hu, Zigang Deng, Jiwang Zhang, Weihua Zhang
Summary: The study investigated the flow structure and aerodynamic loads in evacuated tube transportation with different nose lengths at a speed of 1500 km/h, revealing the impact of nose length on wave systems, flow separation, and wake vortex evolution patterns. Increasing nose length can help reduce aerodynamic loads and drag, and decrease the length of the disturbed region of the leading shock wave.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Mechanics
Qiong Liu, Yiyang Sun, Chi-An Yeh, Lawrence S. Ukeiley, Louis N. Cattafesta, Kunihiko Taira
Summary: Resolvent analysis is used to develop a control strategy to attenuate pressure fluctuations in turbulent flow over a rectangular cavity, achieving significant reduction in pressure fluctuations. Introducing three-dimensional unsteady blowing along the cavity leading edge effectively suppresses oscillations and reduces pressure root mean square level along cavity walls. The control strategy based on resolvent analysis shows promise for application at higher Reynolds numbers with further validation.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Hideki Sato, Masaki Kawata, Ruri Hidema, Hiroshi Suzuki
Summary: This study visualized and quantified the characteristic flow behaviors of viscoelastic surfactant solutions in the cavity of a flow channel. The flow regimes were influenced by both inertia and elasticity, and the bulge structure was found to be a unique and promising flow regime for increasing heat transfer efficiency.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2022)
Article
Mechanics
S. Gupta, C. Sasmal
Summary: This study investigates the effects of aspect ratio (AR) on elastic instability, elastic turbulence, and mixed convective heat transfer in a lid-driven cavity through extensive numerical simulations. The results show that the relationship between AR and heat transfer rate is complex and dependent on the values of Richardson (Ri) and Prandtl numbers (Pr). At low Ri values, the heat transfer rate decreases with AR regardless of Pr and fluid type. However, at high Ri and low Pr values, the heat transfer rate is higher in viscoelastic fluids due to the presence of elastic turbulence. At high values of both Ri and Pr, the heat transfer rate increases with AR in Newtonian fluids but decreases in viscoelastic fluids. The study also discusses the influence of cavity aspect ratio on flow dynamics, showing that higher AR delays the onset of elastic instability and elastic turbulence.
Review
Physics, Multidisciplinary
Thillaikumar Thangaraj, Mrinal Kaushik, Dipankar Deb, Mihaela Unguresan, Vlad Muresan
Summary: This study provides an overview of tab-controlled jets and their influence on mixing promoting vortices at speeds ranging from subsonic to supersonic. It presents a detailed description of circular jets controlled by tab-like vortex generators and discusses the impacts of tabs on mixing enhancement and noise suppression through both experimental and numerical investigations.
FRONTIERS IN PHYSICS
(2022)
Article
Thermodynamics
Tran Dinh Manh, Fatemeh Salehi, Ahmad Shafee, Nguyen Dang Nam, Farshad Shakeriaski, Houman Babazadeh, Ali Vakkar, I. Tlili
Summary: This article examines the effects of magnetic nanofluid hydrothermal patterns on a sheet, including thermal radiation. It demonstrates that factors like magnetic factors, speed ratio factors, temperature index, radiation, and nanofluid mass fraction play significant roles in influencing the hydrothermal pattern.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Tran Dinh Manh, Moharam Bahramkhoo, M. Barzegar Gerdroodbary, Nguyen Dang Nam, Iskander Tlili
Summary: The study utilized analytical approach and numerical techniques to investigate the influence of nanomaterials on MHD flow in non-parallel plates, revealing that the hydraulic boundary layer thickness decreases with the increase of Reynolds number and increases with the increase of Hartmann number.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Tran Dinh Manh, A. M. Abazari, M. Barzegar Gerdroodbary, Nguyen Dang Nam, R. Moradi, Houman Babazadeh
Summary: This study uses the Finite Volume Method to simulate the thermal performance of nanofluids under non-uniform magnetic fields, finding that the addition of magnetic sources can significantly increase local heat transfer.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
M. Barzegar Gerdroodbary, R. Moradi, Houman Babazadeh
Summary: This study investigates the influence of free stream angles on fuel mixing in scramjet design, showing that a positive angle can lead to more uniform expansion of the fuel mixing zone. Increasing the angles of the free stream reduces the mixing zone when the fuel jet interaction decreases, with a mixing efficiency of -20 degrees about 30% more than other angles.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Computer Science, Interdisciplinary Applications
Yu-Ming Chu, Rasoul Moradi, Amir Musa Abazari, Quang-Vu Bach
Summary: The study investigates the impact of nonhomogeny magnetic source on nanofluid flow within an angled junction, finding that the presence of nonhomogeny magnetic field leads to circulation near the junction and reduces mineral sedimentation. The research shows that with two magnetic sources, the Nusselt number increases by 20% as the Reynolds number of nanofluid flow increases from 50 to 100.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2021)
Article
Engineering, Chemical
Amin Hassanvand, Seyyed Hamid Esmaeili-Faraj, Mojtaba Saei Moghaddam, Rasoul Moradi
Summary: The novel wire gauze structured packing PACK-1300Y with high specific surface area was characterized by computational fluid dynamics, focusing on dry and wet pressure drop as well as the height equivalent to a theoretical plate (HETP). The flow structure of this packing was described via numerical simulations and compared to experimental findings to determine average relative errors.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Chuan Sun, Nima Sharifi Rayeni, Mehrafarin Moghimihanjani, R. Moradi, Zhixiong Li
Summary: This study investigates the effects of a sinusoidal splitter on hydrogen and air co-jets in a dual-combustion ramjet engine. Analysis of shockwave/shear-layer interactions behind the splitter reveals the importance of expansion and compression waves in local mixing and combustion. The presence of the splitter results in the formation of vortices, which are influenced by the strength and uniformity of the expansion waves.
Article
Engineering, Aerospace
Guangli Fan, Adel Almarashi, Peixi Guo, Nidal H. Abu-Hamdeh, Abdullah M. Abusorrah, R. Moradi
Summary: The study investigates the impacts of high-velocity air stream interacting with cross fuel jet on fuel mixing and flame stability. Computational fluid dynamic method is used to model the flow structure, revealing that adding an inclined ramp upstream can enhance fuel mixing effectiveness and distribution uniformity.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
M. Sadegh Rajabi, Rasoul Moradi, H. Pirouz Kavehpour
Summary: This review article provides a detailed introduction to the applications of nanotechnology in the oil and gas industry, including upstream, midstream, and downstream. The article highlights the advantages of nanotechnology in this industry and discusses the challenges it faces. The research findings demonstrate the potential of nanotechnology in improving efficiency.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Review
Biochemistry & Molecular Biology
Mehrnaz Entesari, Mina Zamani, Mohammad Heidarizadeh, Rasoul Moradi, Fatemeh Khakdan, Fariba Rafiei
Summary: The outbreak of COVID-19 pandemic has caused significant damage to the world, highlighting the urgent need for a quick and easily available biosensor for detection. Research has shown that using real-time RT-PCR assay with molecular beacons can improve the accuracy of detecting SARS-CoV-2 and distinguish between pathogenic and non-pathogenic strains of coronaviruses.
MOLECULAR BIOTECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Rasoul Moradi, Nazila Pour Khalili, Ni Luh Wulan Septiani, Chia-Hung Liu, Esmail Doustkhah, Yusuke Yamauchi, Slava V. Rotkin
Summary: Modern biosensor technologies are essential for detecting addictive and abused drugs, allowing accurate tracking and detection of trace levels of various drugs.
Article
Chemistry, Multidisciplinary
Tran Dinh Manh, Thanh Liem Huynh, Bui Viet Thi, Sunhwa Lee, Junsin Yi, Nam Nguyen Dang
Summary: Sonneratia caseolaris leaf extract was found to improve the corrosion resistance of steel in hydrochloric acid environments by forming a barrier layer through adsorption. The inhibition effectiveness was independent of the extract concentration and corrosive environment. The presence of electronegative functional groups in the extract promoted the adsorption process for the self-formation of the barrier layer.
Article
Materials Science, Multidisciplinary
Bui Xuan Vuong, Thanh Liem Huynh, Thao Quynh Ngan Tran, S. V. Prabhakar Vattikuti, Tran Dinh Manh, Phuong Nguyen-Tri, Anh Tien Nguyen, Pham Van Hien, Nam Nguyen Dang
Summary: This study demonstrates the potential of an organic film applied on a metallic surface as a low-cost, low-toxicity solution for electrochemical corrosion resistance. The inhibitory effect of Malpighia glabra leaf extract (MGLE) on mild steel corrosion in hydrochloric acid (HCl) media was investigated. The results showed that MGLE had a good inhibitory effect on steel corrosion, especially in more aggressive solutions. Surface analysis revealed the formation of a protective film on the inhibited steel surfaces, reducing corrosion.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Energy & Fuels
M. Sadegh Rajabi, Rasoul Moradi, H. Pirouz Kavehpour
Summary: Water flooding is a commonly used method for increasing oil recovery, and the salinity composition plays an important role in enhanced oil recovery. This study measured the interfacial tension between acidic heavy crude oil and different brine solutions, and investigated the effect of oil composition and water composition on the wettability of carbonate rock. Additionally, the use of silica nanoparticles as an agent for reducing interfacial tension and altering wettability was examined. The results showed that magnesium chloride at 1 M concentration had the lowest interfacial tension and the highest impact on wettability alteration. The application of silica nanoparticles showed insignificant effects in this study.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Food Science & Technology
Le Si Ngoc, Pham Thi Ha Van, Tran Thi Yen Nhi, Nguyen Anh Dung, Tran Dinh Manh
Summary: This research assessed the effects of dipping time on the quality of sweet oranges. The results showed that a 6-minute dipping time can maintain the quality of oranges, including improving skin color, increasing total soluble solids, fruit firmness, ascorbic acid, and taste scores, while reducing weight loss, decay incidence, ethylene production, and respiration rate.
FOOD SCIENCE AND TECHNOLOGY
(2022)
