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Journal articles on the topic 'Baffle Wall'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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1

Minh Phu, Nguyen, Pham Ba Thao, and Duong Cong Truyen. "Heat and Fluid Flow Characteristics of Nanofluid in A Channel Baffled Opposite to The Heated Wall." CFD Letters 13, no. 1 (2021): 33–44. http://dx.doi.org/10.37934/cfdl.13.1.3344.

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In this paper, a nanofluid-based solar collector duct equipped with baffles is examined numerically. Baffles are located on the back plate to guide nanofluid flow toward absorber plate for heat transfer enhancement purposes. Cu-water nanofluid with fixed flow rate and concentration in the baffled duct are investigated for thermohydraulic mechanisms. Baffles with different inclination angles, heights and pitches are considered in this study. Numerical simulations are performed using Ansys fluent software with verified results compared to those of an experiment in the literature. The results sho

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2

Lei, Cheng Wang, and Tuo Tian Wang. "Natural Convection of Air through an Asymmetrically Heated Vertical Channel with a Baffle." Applied Mechanics and Materials 846 (July 2016): 7–11. http://dx.doi.org/10.4028/www.scientific.net/amm.846.7.

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The buoyancy-induced air flow through a two-dimensional vertical ventilation channel is calculated. One of the channel walls is heated uniformly, and the other wall is adiabatic. A thin baffle is placed on the heated wall to manipulate the air flow through the channel. Numerical results are obtained for baffles of different lengths and placed at various heights along the heated wall. It is found that the baffle is effective in weakening a reverse flow at the exit of the channel, and significant enhancement of ventilation performance may be achieved with the presence of the baffle.

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3

Yaseen, Duna, and Muneer Ismael. "Effect of Deformable Baffle on the Mixed Convection of Non-Newtonian Fluids in a Channel-Cavity." Basrah journal for engineering science 20, no. 2 (2020): 18–26. http://dx.doi.org/10.33971/bjes.20.2.3.

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A simulation of fluid-structure interaction (FSI) and combined convective heat exchange is accomplished in an open trapezoidal cavity-channel. A non-Newtonian (power law fluid) is inspected within the laminar region. The heat source is simulated by an isothermal hot cavity bottom wall, whereas all the rest solid walls are perfectly insulated. A deformable baffle is fixed at the top wall of the channel and its free end extends towards the open cavity. The location of the deformable baffle on the top wall is varied. The baffle position is investigated together with Richardson number (Ri = 0.01-1

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4

Nagasubramanian, N., M. R. Thansekhar, M. Venkatesan, and K. Ramanathan. "Numerical Investigation of Natural Convection in a Square Enclosure with a Baffle Mounted on Vertical Wall." Applied Mechanics and Materials 813-814 (November 2015): 748–53. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.748.

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Results from numerical investigation of laminar natural convection inside a differentially heated square enclosure with a thin baffle attached to the cold wall are reported. The effect of the baffles on the flow and temperature fields were analyzed for baffle lengths equal to 20, 35 and 50 percent of the width of the enclosure, attached at three locations for Ra = 104, 105, 106 and Pr = 0.707. The presence of a baffle on the cold right wall affects the strength of the clockwise rotating primary vortex. Reduced flow and heat transfer are observed. Longer the baffle more pronounced the effect on

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5

Furukawa, Haruki, Yoshito Mizuno, and Yoshihito Kato. "Mixing Performance of Inner Baffle in Shear Thinning Fluid." MATEC Web of Conferences 333 (2021): 02004. http://dx.doi.org/10.1051/matecconf/202133302004.

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A mixing performance of an inner baffle was investigated in shear thinning fluid. The inner baffle was placed with a clearance between baffle and vessel wall. A traditional two-bladed paddle impeller was used. Four planar baffles were vertically placed in two ways: 1) standard baffle condition 2) inner baffle condition. The standard baffle condition was that the baffle was placed on the mixing vessel wall. A mixing pattern was visualized by decolorization method based on an oxidation-reduction reaction with sodium thiosulfate and iodine. Flow field for shear thinning fluid in mixing vessel was

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6

Furukawa, Haruki, Yoshito Mizuno, and Yoshihito Kato. "Mixing Performance of Inner Baffle in Shear Thinning Fluid." MATEC Web of Conferences 333 (2021): 02004. http://dx.doi.org/10.1051/matecconf/202133302004.

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A mixing performance of an inner baffle was investigated in shear thinning fluid. The inner baffle was placed with a clearance between baffle and vessel wall. A traditional two-bladed paddle impeller was used. Four planar baffles were vertically placed in two ways: 1) standard baffle condition 2) inner baffle condition. The standard baffle condition was that the baffle was placed on the mixing vessel wall. A mixing pattern was visualized by decolorization method based on an oxidation-reduction reaction with sodium thiosulfate and iodine. Flow field for shear thinning fluid in mixing vessel was

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7

Heshmati, Amirhossein, Hussein A. Mohammed, Mohammad Parsazadeh, et al. "Effect of Vertical Baffle Installation on Forced Convective Heat Transfer in Channel Having a Backward Facing Step." Applied Mechanics and Materials 388 (August 2013): 169–75. http://dx.doi.org/10.4028/www.scientific.net/amm.388.169.

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In this study, forced convective heat transfer is considered in channel over a backward facing step having a baffle on the top wall. Four different geometries with different expansion ratios and different type of baffles are numerically investigated. The study clearly shows that the geometry with expansion ratio 2 and solid baffle has the highest Nusselt number compared to other geometries. Considering both Nusselt number and skin friction coefficient for all four geometries clearly illustrated an increase in average Nusselt number by increasing the expansion ratio. This study clearly shows th

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8

Al-Farhany, Khaled, Barik Al-Muhja, Farhan Ali, et al. "The Baffle Length Effects on the Natural Convection in Nanofluid-Filled Square Enclosure with Sinusoidal Temperature." Molecules 27, no. 14 (2022): 4445. http://dx.doi.org/10.3390/molecules27144445.

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The proper process of applying heat to many technological devices is a significant challenge. There are many nanofluids of different sizes used inside the system. The current study combines this potential to improve convection effects, considering numerical simulations of natural convection using Cu/water nanofluids in a square enclosure with bottom blocks embedded in baffles. The enclosure consists of two vertical walls with isothermal boundary conditions; the left wall is the sinusoidal heat source, whereas the right wall is cooled. The investigations dealt with the influences of nanoparticl

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9

Zhu, Aimeng, Mi-An Xue, Xiaoli Yuan, Feng Zhang, and Wei Zhang. "Effect of Double-Side Curved Baffle on Reducing Sloshing in Tanks under Surge and Pitch Excitations." Shock and Vibration 2021 (February 19, 2021): 1–17. http://dx.doi.org/10.1155/2021/6647604.

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Sloshing is associated with the structural safety of liquid storage vessel. Installing the baffles inside the containers would be beneficial for the mitigating the damage due to the severe sloshing. In this study, an innovative type of double-side curved baffle was proposed to evaluate its effect on reducing sloshing in a rectangular tank under surge and pitch excitation. For comparison with conventional baffles, effects of the vertical baffle and the T-type baffle on mitigating sloshing were also studied experimentally and numerically by analyzing the free surface wave elevation as well as th

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10

Furukawa, Haruki, Tomoki Ota, and Yoshihito Kato. "Effect of inside Surface Baffle Conditions on Just Drawdown Impeller Rotational Speed." International Journal of Chemical Engineering 2024 (April 22, 2024): 1–9. http://dx.doi.org/10.1155/2024/9254851.

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The effect of inside surface baffle installation conditions on the minimum impeller rotational speed for just the drawdown of floating solid NJD was investigated. The inside surface baffle condition is the condition in which a partial baffle is placed with a clearance between the baffle and the vessel wall. In this study, a baffle with an insertion length of 0.2 times the liquid height was used. Moreover, the effect of baffle angle on NJD was investigated. The NJD was measured visually at least three times. The results showed that the effect of the radial installation position of the inside su

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11

Habib, M. A., A. M. Mobarak, M. A. Sallak, E. A. Abdel Hadi, and R. I. Affify. "Experimental Investigation of Heat Transfer and Flow Over Baffles of Different Heights." Journal of Heat Transfer 116, no. 2 (1994): 363–68. http://dx.doi.org/10.1115/1.2911408.

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The phenomenon of flow separation in ducts with segmented baffles has many engineering applications, for example, shell-and-tube heat exchangers with segmented baffles, labyrinth shaft seals, laser curtain seals, air-cooled solar collectors, and internally cooled turbine blades. In the present work, an experimental investigation has been done to study the characteristics of the turbulent flow and heat transfer inside the periodic cell formed between segmented baffles staggered in a rectangular duct. In particular, flow field, pressure loss, and local and average heat transfer coefficients were

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12

Haghani, Ahmad, Mehdi Jahangiri, Rouhollah Yadollahi Farsani, Ayoub Khosravi Farsani, and Jalal Fazilatmanesh. "Transient Fluid-Solid Interaction and Heat Transfer in a Cavity with Elastic Baffles Mounted on the Sidewalls." Mathematical Problems in Engineering 2021 (December 27, 2021): 1–15. http://dx.doi.org/10.1155/2021/8842898.

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Fluid-solid interaction phenomenon study is necessary for the analysis of several engineering systems such as structures and vessels that interact with wind and blood flow, respectively. In this study, the interactions between buoyancy-driven airflow and elastic baffle(s) inside a square enclosure were modeled numerically. While the two sidewalls of the enclosure were insulated, the lower and upper walls were kept at hot and cold temperatures, respectively. The heat transfer rate through the hot wall by calculating the Nusselt number and von Mises stress at the baffles’ root for various config

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13

Gwatiya, Arvind, and Nitin Dubey. "Design And Analysis Of A Concentric Tthex, Triple Tube Heat Exchanger, For Better Heat Transfer With Enhanced Thermal Performance Using Computational Fluid Dynamics." SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology 14, no. 03 (2022): 245–54. http://dx.doi.org/10.18090//samriddhi.v14i03.01.

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For the goal of improving thermal efficiency, mathematics and computationally fluid dynamics assessments of several designs of a circumferential TTHEX were done.A total of five designs have been used to check its thermal performance for the same boundary conditions at various concentration ratios ofgraphenenanoplatelets–platinumnanofluid for this The momentum boundary condition with no slip is set for solid walls whereto achieve adiabatic conditions, the heat flows is for an outside lateral wall is set to zero, while the inner tube walls and baffles are coupled. In the computational domain, fl

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14

Turgut, Oguz, and Erkan Kizilirmak. "Effects of Reynolds number, baffle angle, and baffle distance on three-dimensional turbulent flow and heat transfer in a circular pipe." Thermal Science 19, no. 5 (2015): 1633–48. http://dx.doi.org/10.2298/tsci121011045t.

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In this study, steady-state three-dimensional turbulent forced convection flow and heat transfer characteristics in a circular pipe with baffles attached inside pipe have been numerically investigated under constant wall heat flux boundary condition. Numerical study has been carried out for Reynolds number Re of 3000-50,000, Prandtl number Pr of 0.71, baffle distances s/D of 1, 2, and 3, and baffle angle a of 30o-150o. Ansys Fluent 12.0.1 software has been used to solve the flow field. It is observed that circular pipe having baffles has a higher Nusselt number and friction factor compared to

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15

Al-Farhany, Khaled, Barik Al-Muhja, Karuppusamy Loganathan, Umadevi Periyasamy, Farhan Ali, and Ioannis E. Sarris. "Analysis of Convection Phenomenon in Enclosure Utilizing Nanofluids with Baffle Effects." Energies 15, no. 18 (2022): 6615. http://dx.doi.org/10.3390/en15186615.

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The behavior of convective heat transfer in an enclosure filled with Cu–water nanofluid with a baffle has been numerically studied using the finite element method. The enclosure’s top and bottom walls were adiabatic, while the other two were maintained at various temperatures. The left hot wall had an effective thickness and a baffle was added to the bottom wall. The influence of different parameters like the nanoparticle’s concentration (ϕ), Rayleigh number (Ra), the thermal conductivity ratio of the thick wall (Kr), baffle angle (Ø), and the hot wall thickness (D) on the isotherm and fluid f

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16

Wang, Yingjia, Qingfei Du, Xingchen Li, Minshan Liu, and Zunchao Liu. "Effect of shell on performance of heat exchanger with trefoil-hole baffle." Thermal Science, no. 00 (2022): 28. http://dx.doi.org/10.2298/tsci211106028w.

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The periodic whole cross-section model and the periodic unit duct model were established, and the differences between two models were discussed. The effects of shell wall and baffle edges on the shell side performance of the heat exchanger with trefoil-hole baffle were investigated using both models. Thermodynamics in the shell side and heat transfer coefficient of each tube in different position were discussed. It is found that disparities between the results of the two numerical models decreases with the increase of the inner shell diameter. When the shell diameter is 0.8 m, the disparity is

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17

Duan, Runze, Yifan Cao, Hongbin Duan, et al. "Effect of the inner-surface baffles on the tangential acoustic mode in the cylindrical combustor." Open Physics 18, no. 1 (2020): 1215–22. http://dx.doi.org/10.1515/phys-2020-0187.

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Abstract The combustion instability in a propulsion system is a ubiquitous problem. The radial baffles usually installed on the injector faceplate eliminate the combustion instability (acoustic pressure oscillation) in the propulsion system. In this article, the longitudinal baffles are installed on the inner surface of the combustor wall to control the combustion instabilities. The first-order and second-order tangential modes are induced in the experiments. The effects of the parameters of the baffle on the acoustic pressure oscillation in the cylindrical combustor are investigated. The effe

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18

Al-Lami, Hayder, Murtadha Saeed Mohammed, Radhwan Ali, Ahmed Alshara, and Hussein Kareem Abdul Zahra. "Characteristics of Heat Transfer and Turbulent Flow in a Baffled Pipe with Different Arrangements." European Journal of Engineering and Technology Research 7, no. 6 (2022): 113–19. http://dx.doi.org/10.24018/ejeng.2022.7.6.2921.

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In the heat transfer, fluid flow and energy fields, baffles are an advanced enhancer to improve heat transfer and fluid mixing by working as an obstacle to the flow particles and then increasing the turbulence. The present paper numerically investigates the thermal performance of a circular pipe with a centralized baffle in two arrangements, with a Reynolds number (Re) (ranging from 10,000-50,000) under constant wall heat flux boundary conditions. Ansys Fluent software is used to solve the flow field considering six conical baffles with different Pitch ratios (PR) (from 1 to 5). Results show t

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19

Zhou, Wenhe, Shuo Cheng, Jia Wang, and Yong Liu. "Numerical Analysis on Performance Improvement of a Vertical Plate Indirect Evaporative Cooler with Baffles." Energies 17, no. 10 (2024): 2315. http://dx.doi.org/10.3390/en17102315.

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The performance of the Plate Indirect Evaporative Cooler (PIEC) can be effectively improved by incorporating baffles in the dry channel. However, in the dimensional influence of the baffles on PIEC performance there remains a research gap. In order to investigate the impact of baffle dimensions on the wet bulb efficiency, namely the average heat transfer coefficient and the cooling capacity of the PIEC, this paper proposed and verified a three-dimensional numerical model and method based on the species transport model and the Euler wall film model. At the same time, in order to obtain the equi

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20

Sherza, Jenan S., Duaa Amir Dhiab, Farah Abdulzahra Taher, Nagham Qassim Shari, and Faik A. Hamad. "Numerical Investigation of the Hydrothermal Performance of Rectangular and V-Shape Vortex Generators in a Square Channel." CFD Letters 17, no. 9 (2025): 104–26. https://doi.org/10.37934/cfdl.17.9.104126.

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The present work aims to study the effects of rectangular and V-shape baffles on enhancing the heat transfer in rectangular channels. Baffles are passive vortex generator techniques that enhance heat transfer in thermal systems. The study intends to use CFD to investigate the two different shapes of vortex generators under various design parameters. Heat transfer and pressure drop features in a square channel for Reynolds numbers ranging from 700 to 2100 will be analysed. The investigated baffles configurations are six rectangular baffles located on the bottom wall of the channel and six V-sha

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21

Farhan Lafta Rashid, Emad Qasem Hussein, Mudhar A. Al-Obaidi, and Awesar A. Hussain. "Numerical Simulation of a Partly Filled Rectangular Tank with Fuel Oil." Journal of Techniques 5, no. 3 (2023): 42–51. http://dx.doi.org/10.51173/jt.v5i3.1465.

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Sloshing refers to a certain kind of fluid movement that changes as it progresses. It possesses properties that are both nonlinear and exceedingly unpredictable, and these properties affect the tank wall. This effect may lead to structural wear, which in turn can cause the tank to fail. Benzene and gasoil liquids are used to test the effect of sloshing liquid and accompanying pressure on the wall tank caused by the baffles in partially full fluid tanks. To attain this, modeling of the interaction between fluid and structure is justified using the finite element analysis while the ANSYS Fluent

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22

HABBEB, SATTAR J., and ISRAA Y. DAOUD. "PREDICTION OF NATURAL CONVECTION HEAT TRANSFER IN COMPLEX PARTITIONS CAVITY." Journal of Engineering 16, no. 03 (2010): 5459–82. http://dx.doi.org/10.31026/j.eng.2010.03.13.

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A numerical investigation has been carried out to examine the effects of insulated baffle mounted in complex cavity representing as an industrial building on flow pattern and heat transfer characteristics. The cavity is formed by adiabatic horizontal bottom, inclined upper walls and vertical isothermal walls. This problem is solved by using flow-energy equations in terms of stream-vorticity formulation in curvilinear coordinates. Two cases are considered; in the first (case 1) the insulated baffle position attached to the horizontal bottom wall of the cavity while in the second case (case 2) t

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23

Thao, Pham Ba, Duong Cong Truyen, and Nguyen Minh Phu. "CFD Analysis and Taguchi-Based Optimization of the Thermohydraulic Performance of a Solar Air Heater Duct Baffled on a Back Plate." Applied Sciences 11, no. 10 (2021): 4645. http://dx.doi.org/10.3390/app11104645.

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In this paper, a solar air collector duct equipped with baffles on a back plate was numerically investigated. The Reynolds number (Re) was varied from 5000 to 20,000, the angle baffle (a) from 30° to 120°, the baffle spacing ratio (Pr) from 2 to 8, and the baffle blockage ratio (Br) from 0.375 to 0.75 to examine their effects on the Nusselt number (Nu), the friction factor (f), and the thermohydraulic performance parameter (η). The 2D numerical simulation used the standard k-ε turbulence model with enhanced wall treatment. The Taguchi method was used to design the experiment, generating an ort

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24

Yang, Qinghua, and Qian Yang. "Experimental investigation of hydraulic characteristics and energy dissipation in a baffle-drop shaft." Water Science and Technology 82, no. 8 (2020): 1603–13. http://dx.doi.org/10.2166/wst.2020.441.

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Abstract The baffle-drop shaft structure is usually applied in deep tunnel drainage systems to transfer shallow storm water to underground tunnels. At present, the definition of the maximum operational capacity of baffle-drop shafts is lack of scientific and reasonable analysis, and the researches on hydraulic and energy dissipation characteristics have been insufficient. In this paper, a 1:25 scale hydraulic model test was conducted to observe the flow phenomena during the discharge process, analyze the relationship between the maximum inflow discharge and the baffle parameters, and calculate

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25

Almeshaal, Mohammed A., and Chemseddine Maatki. "Numerical Study of Inclination Effect of the Floating Solar Still Fitted with a Baffle in 3D Double Diffusive Natural Convection." Processes 10, no. 8 (2022): 1607. http://dx.doi.org/10.3390/pr10081607.

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A three-dimensional computational study of double-diffusive natural convection was conducted to explore the impact of tilt on the thermal and solutal performance of a floating pyramidal solar still filled with an air-steam mixture. In the present work, the still is cooled from the upper walls and is maintained at a low vapor concentration. The bottom wall of the still is maintained at a hot temperature and high concentration. Four different models of baffles placed in the upper region of the solar still have been studied. The mathematical formulation of the equations governing the problem is b

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26

Khan, Liaqat A., Edward A. Wicklein, and Mizan Rashid. "A 3D CFD model analysis of the hydraulics of an outfall structure at a power plant." Journal of Hydroinformatics 7, no. 4 (2005): 283–90. http://dx.doi.org/10.2166/hydro.2005.0024.

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A practical application of a three-dimensional (3D) computational fluid dynamics (CFD) model to an outfall structure of a power plant is presented in this paper. The outfall structure, used for discharging 55 m3/s of cooling water to a reservoir, consists of two inflow pipes, two deflectors and a baffle wall. The computational grid, resolving all the geometric features of the outfall structure consists of 350,660 hexahedral cells. The CFD model was run for two configurations of the outfall structure, with and without a baffle wall. The interactions of two high velocity jets with deflectors and

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27

Haddar, Mohamed, Moez Hammami, and Mounir Baccar. "Numerical study of steady natural convection in a liquefied natural gas cylindrical storage tank equipped with baffles." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 5 (2019): 709–21. http://dx.doi.org/10.1177/0957650919870927.

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In this paper, a study of cooling system for a liquefied natural gas storage tank is conducted. Our objective is to remedy the heat ingress to the liquefied natural gas from the environment using baffles toward limiting temperature elevation in the tank, and then the Boil-off Gas (BOG) formation. A specific code based on the finite volume method is developed to supply a fine knowledge of the hydrodynamic and thermal liquefied natural gas characteristics in the cylindrical tank heated from bottom and lateral surfaces. The effect of the number, position and dimension of baffles, on the flow stru

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28

AL-Muhjaa, Barik, and Khaled Al-Farhany. "Numerical Investigation of the Effect of Baffle Inclination Angle on Nanofluid Natural Convection Heat Transfer in A Square Enclosure." Al-Qadisiyah Journal for Engineering Sciences 12, no. 2 (2019): 61–71. http://dx.doi.org/10.30772/qjes.v12i2.589.

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The characteristics of the conjugate natural convection of (Al2O3-water) nanofluid inside differentially heated enclosure is numerically analyzed using COMSOL Multiphysics (5.3a). The enclosure consists of two vertical walls, the left wall has a thickness and maintain at a uniform hot temperature, while the opposite wall at cold temperature and the horizontal walls are isolated. A high thermal conductivity thin baffle has been added on the insulated bottom wall at a different inclination angles. The effect of the volume fractions of nanoparticles (f), Rayleigh number (Ra), solid wall thermal c

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29

Salah, El-Din. "Laminar fully developed mixed convection with viscous dissipation in a uniformly heated vertical double-passage channel." Thermal Science 11, no. 1 (2007): 27–41. http://dx.doi.org/10.2298/tsci0701027s.

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Fully developed laminar mixed convection has been investigated numerically in a vertical double-passage channel by taking into account the effect of viscous dissipation. The channel is divided into two passages by means of a thin, perfectly conductive plane baffle and the walls are uniformly heated. The effects of Brinkman number and the ratio between Grashof and Reynolds numbers on the velocity and temperature profiles and the Nusselt number on the hot wall have been analyzed. The results show that these effects depend mainly on the baffle position. .

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30

Afif, Benameur, Mohamed Salmi, Ali Akgul, Rabab Jarrar, Jihad Asad, and Younes Menni. "Comparative analysis of solar air channels, Z-shaped obstacles added to improve flow structure." Thermal Science 26, Spec. issue 1 (2022): 201–10. http://dx.doi.org/10.2298/tsci22s1201a.

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This paper's numerical study, which applies the finite volume approach and SIMPLE algorithm, aims to dynamically analyze airflow through a channel with Z-obstacles. Three distinct models were used to place the Z-barriers inside the channel. According to Demartini et al.'s model (2004) and as depicted in example A from the present analysis, the first Z-barrier (fin) is attached to the top wall (heated) and the second (baffle) to the bottom wall (insulated). The Z-barriers, on the other hand, were positioned in the second model on the same wall (in-line arrangement), either on the top surface (t

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31

Belmiloud, Mohamed Amine, Noureddine Sad_Chemloul, and Mohamed Guemmour. "Effect of baffle length on mixed convection coupled to surface radiation in a rectangle cavity." Journal of Renewable Energies 20, no. 1 (2023): 81–89. http://dx.doi.org/10.54966/jreen.v20i1.611.

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In this study, we numerically investigated the influence of the baffle length and emissivity of the walls on heat transfer in a mixed convection coupled with radiation in a rectangular cavity ventilated. The baffle length is used Lb = 0.3, 0.5 and 0.7. The cavity walls are gray. The left vertical wall is heated to a constant heat flux and the other walls are adiabatic. The finite volume method is used to solve the governing equations. At the input of the cavity whose opening height w =H/10, the fluid velocity is determined from the number of Reynolds Re between 50 and 500. The Grashof number G

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32

Jing, Wei, Xuansheng Cheng, Wei Shi, Jin Fan, and Huan Feng. "Study of Baffle Boundary and System Parameters on Liquid-Solid Coupling Vibration of Rectangular Liquid-Storage Structure." Shock and Vibration 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/8613723.

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In order to study the vibration problem of liquid-solid coupling of rectangular liquid-storage structure with horizontal elastic baffle, ignoring the influence of surface gravity wave, two different velocity potential functions corresponding to the liquid above and below the elastic baffle are assumed; based on the theory of mathematical equation and energy method, the formulas of basic frequency of liquid-solid coupling vibration system are derived, the baffle joined to the tank wall with 3 kinds of boundary conditions, namely, four edges simply supported, two opposite edges clamped and two o

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33

Peiravi, Mohammad Mohsen, Javad Alinejad, D. D. Ganji, and Soroush Maddah. "3D optimization of baffle arrangement in a multi-phase nanofluid natural convection based on numerical simulation." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 5 (2019): 2583–605. http://dx.doi.org/10.1108/hff-01-2019-0012.

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Purpose The purpose of this study is investigating the effect of using multi-phase nanofluids, Rayleigh number and baffle arrangement simultaneously on the heat transfer rate and Predict the optimal arrangement type of baffles in the differentiation of Rayleigh number in a 3D enclosure. Design/methodology/approach Simulations were performed on the base of the L25 Taguchi orthogonal array, and each test was conducted under different height and baffle arrangement. The multi-phase thermal lattice Boltzmann based on the D3Q19 method was used for modeling fluid flow and temperature fields. Findings

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34

Schwalbe, Julien, Bogac Tur, Stefan Kniesburges, et al. "Modeling and Simulation of Standing Wave Configurations for Outflow Improvement and Minimizing Undesired Recirculation." Applied Sciences 15, no. 6 (2025): 3127. https://doi.org/10.3390/app15063127.

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River surfing has evolved from natural rivers to artificial standing waves, like the Fuchslochwelle in Nuremberg, where optimizing wave quality and safety remains a challenge. Key issues include recirculation zones that pose risks, particularly at higher inflows. This study addresses safety and performance improvements by introducing geometric modifications to reduce recirculation zones. Using STAR-CCM+ simulations, 16 configurations of baffles and inlays were analyzed. A 3D-CAD model of the Fuchslochwelle was developed to test symmetrical and asymmetrical configurations, focusing on reducing

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Menni, Younes, Ali J. Chamkha, Chafika Zidani, and Boumédiène Benyoucef. "Heat Transfer in Air Flow Past a Bottom Channel Wall-Attached Diamond-Shaped Baffle – Using a CFD Technique." Periodica Polytechnica Mechanical Engineering 63, no. 2 (2019): 100–112. http://dx.doi.org/10.3311/ppme.12490.

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A computational analysis has been conducted to investigate turbulent flow and convective thermal transfer characteristics in a two-dimensional horizontal rectangular section channel with a hot lower wall-mounted diamond-shaped baffle. The calculations are based on the finite volume method, by means of Commercial Computational Fluid Dynamics software FLUENT, standard k-epsilon turbulence model with QUICK numerical scheme, and the SIMPLE discretization algorithm has been applied. The fluid flow and heat transfer characteristics, i.e., dynamic pressure coefficient, stream function, mean, axial, a

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Zhang, Enhui, Hao Chen, Lihe Wang, Jianbin Huang, and Fei Xu. "Numerical analysis of oil liquid sloshing in fuel tanks of plug-in hybrid electric vehicles under different structure baffles." Journal of Physics: Conference Series 2879, no. 1 (2024): 012024. http://dx.doi.org/10.1088/1742-6596/2879/1/012024.

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Abstract To solve a large amount of oil liquid sloshing in the fuel tank and a series of problems caused by oil liquid sloshing in the plug-in hybrid electric vehicle (PHEV) under the condition of electric drive only, this paper analyzes the oil liquid sloshing in fuel tank under different liquid filling rates under complex situations. After determining the representative liquid filling rates, the optimal scheme is finally determined. We conduct the specific analysis of different types, structures, and installation modes of fuel tank baffles under the same working conditions and liquid filling

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Edori, E. S., D. Bekee, and P. U. Igwe. "Effect of Corrosion Inhibitors on the Corrosion Rate of Refinery Boiler Components." Chemistry Research Journal 5, no. 3 (2020): 94–101. https://doi.org/10.5281/zenodo.12509016.

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<strong>Abstract</strong> This research work investigated the corrosion rates in six boiler component parts in the absence and presence of corrosion inhibitors. The investigations were based on tested mathematical model equations derived from ordinary differential equation. For the period of four years the corrosion of the boiler component tubes in the absence of inhibitors ranged between 0.54-1.80mm in the fan suction air duct, 0.05-0.2mm in the bank tubes, 0.4623-2.15mm in the desuperheater coil, 0.2125-0.75mm in the baffle wall tube, 0.175-0.60mm in the vapourizing tube bank and0.11-0.4mm i

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Sivasankaran, Sivanandam, and Kandasamy Janagi. "Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size." Mathematical and Computational Applications 27, no. 1 (2022): 9. http://dx.doi.org/10.3390/mca27010009.

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The objective of the current numerical study is to explore the combined natural and forced convection and energy transport in a channel with an open cavity. An adiabatic baffle of finite length is attached to the top wall. The sinusoidal heating is implemented on the lower horizontal wall of the open cavity. The other areas of the channel cavity are treated as adiabatic. The governing equations are solved by the control volume technique for various values of relevant factors. The drag force, bulk temperature and average Nusselt number are computed. It is recognised that recirculating eddies be

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M.Rathinam, Thansekhar. "Effect of Al2O3/water nanofluid on Conjugate Free Convection in a Baffle Attached Square Enclosure." Mechanics 26, no. 2 (2020): 126–33. http://dx.doi.org/10.5755/j01.mech.26.2.22378.

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A numerical study of conjugate free convection heat transfer of Al2O3/water nanofluid inside a differentially heated square enclosure with a baffle attached to its hot wall has been carried out. A detailed parametric study has been carried out to analyze the effect of Rayleigh number (104 < Ra < 106), length, thickness and position of baffle, conductivity ratio and volume fraction of the nanoparticle (0<<0.2) on heat transfer. The thermal conductivity ratio of the baffle plays a major role on the conjugate heat transfer inside the enclosure. Higher the baffle length better is the e

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Liu, Shangjunnan, Shuhai Liu, and Huaping Xiao. "Impacts of structural parameters of baffle plate on jetting pigging robot in the underwater oil and gas pipeline." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 236, no. 1 (2021): 3–18. http://dx.doi.org/10.1177/14750902211052954.

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During the operation of oil and gas transportation pipeline, condensate forms on the inner wall of the pipeline can lead to reduced transportation efficiency and potential safety hazards. Pigging is a widely used technology to remove deposition in pipelines. From the studies, it is found that the effect of pigging largely depends on the structure of the pig. The jetting pig is a new type of pigging device designed to prevent the blocking in the pigging process, and its baffles play an important role in guiding the jet fluid. In this paper, the impact of the structure of the baffle plate on the

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Boonloi, Amnart, and Withada Jedsadaratanachai. "Thermal Performance Analysis and Empirical Correlations for Laminar Forced Convection over 30° V-Baffled Square Channel." Advances in Mechanical Engineering 6 (January 1, 2014): 930272. http://dx.doi.org/10.1155/2014/930272.

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Thermal performance analysis for laminar forced convection in an isothermal wall square channel with 30° V-baffle is presented numerically. The parameters of the V-baffle, blockage ratio (b/H, BR), pitch ratio (P/H, PR), flow direction (V-Downstream and V-Upstream), and arrangement (in-line and staggered), are studied and compared with the previous works, 20° and 45° V-baffle. The Reynolds number based on the hydraulic diameter of the channel ( D h), Re = 100–2000, is used in range study. The results show that the flow configurations of 30° V-baffle are found similar as 20° and 45° V-baffle. T

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Menni, Younes, and Ahmed Azzi. "Numerical Analysis of Thermal and Aerodynamic Fields in a Channel with Cascaded Baffles." Periodica Polytechnica Mechanical Engineering 62, no. 1 (2017): 16. http://dx.doi.org/10.3311/ppme.10613.

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A computational fluid dynamic analysis of thermal and aerodynamic fields for an incompressible steady-state flow of a Newtonian fluid through a two-dimensional horizontal rectangular section channel with upper and lower wall-attached, vertical, staggered, transverse, cascaded rectangular-triangular (CRT), solid-type baffles is carried out in the present paper using the Commercial, Computational Fluid Dynamics, software FLUENT. The flow model is governed by the Reynolds averaged Navier-Stokes (RANS) equations with the SST k-ω turbulence model and the energy equation. The finite volume method (F

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Juraeva, Makhsuda, and Dong-Jin Kang. "Mixing Performance of a Passive Micro-Mixer with Mixing Units Stacked in Cross Flow Direction." Micromachines 12, no. 12 (2021): 1530. http://dx.doi.org/10.3390/mi12121530.

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A new passive micro-mixer with mixing units stacked in the cross flow direction was proposed, and its performance was evaluated numerically. The present micro-mixer consisted of eight mixing units. Each mixing unit had four baffles, and they were arranged alternatively in the cross flow and transverse direction. The mixing units were stacked in four different ways: one step, two step, four step, and eight step stacking. A numerical study was carried out for the Reynolds numbers from 0.5 to 50. The corresponding volume flow rate ranged from 6.33 μL/min to 633 μL/min. The mixing performance was

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Guo, Zheng. "A New Method Solving Contact/Detach Problem in Fluid and Structure Interaction Simulation with Application in Modeling of a Safety Valve." Mathematical Problems in Engineering 2010 (2010): 1–15. http://dx.doi.org/10.1155/2010/458084.

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A new virtual baffle methodology is implemented to solve contact/detach problem which is often encountered in fluid and structure interaction simulations while using dynamic grids technique. The algorithm is based on tetrahedral unstructured grid, and a zero thickness baffle face is generated between actually contacted two objects. In computation process, this baffle face is divided into two parts representing convective and blocked area, respectively; the area of each part is calculated according to the actual displacement between the two objects. Convective part in a baffle face is treated a

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Tamna, Sombat, Rachan Poonperm, Pongjet Promvonge, and Chinaruk Thianpong. "Laminar Convection Heat Transfer in Square Channel Fitted Diagonally with 45° V-Discrete Baffles." Advanced Materials Research 931-932 (May 2014): 1149–53. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.1149.

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This work presents a numerical investigation of laminar periodic flow and heat transfer in a constant heat flux-surfaced square-channel fitted diagonally with 45° V-discrete baffles. The computations are based on the finite volume method, and the SIMPLE algorithm has been implemented. The fluid flow and heat transfer characteristics are presented for Reynolds numbers based on the hydraulic diameter of the channel ranging from 200 to 1,200. Effects of different blockage ratios (BR=b/H), BR in range from 0.05-0.2 with pitch ratio of 1.0 on heat transfer and pressure loss in the channel are studi

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Qi, Wang, Yoo Sung-Jun, Wang Xin, and Ito Kazuhide. "Exploratory computational fluid and particle dynamics analyses in multi-layered vertical duct-type ventilation system for heat exchange and air purification." E3S Web of Conferences 396 (2023): 03006. http://dx.doi.org/10.1051/e3sconf/202339603006.

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This study aims to develop a vertical air duct which is embedded inside the building envelop. It is also designed as a counter-flow heat recovery ventilator (HRV). The vertical air duct model in this study adopted baffle structure considering two methods to suppress the inflow of the particulate matters from outdoor: 1) trapping by wall surface and airflow structure and 2) gravitational sedimentation in the air duct. Design parametric analyses are conducted using computational fluid dynamics to determine optimal design of vertical air duct. Three types of analytical case with various set-up of

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Brůha, Tomáš, Pavel Procházka, and Václav Uruba. "Investigation of Low-Frequency Phenomena within Flow Pattern in Standard Mixing Vessel Induced by Pitched Blade Impeller." Processes 9, no. 3 (2021): 545. http://dx.doi.org/10.3390/pr9030545.

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An experimental study on the flow pattern dynamics in a standard mixing vessel with radial baffles filled with water and induced by a pitched blade impeller pumping downward is presented. Investigation is mainly focused on detection and analysis of quasi-periodical or periodical low-frequency phenomenon connected with time- and length-scales considerably exceeding the Blade Passage Frequency (hereinafter BPF) and common turbulent eddies. This phenomenon, which is expressed as large-scale mean-flow variations, is generally known as flow Macro-Instability (hereinafter MI). It could break-down ju

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Eiamsa-Ard, Smith, Arnut Phila, Khwanchit Wongcharee, et al. "Thermal Visualization and Performance Analysis in a Channel Installing Transverse Baffles with Square Wings." Energies 15, no. 22 (2022): 8736. http://dx.doi.org/10.3390/en15228736.

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The experimental examination of local heat transfer, thermal intensification, friction factors, and thermal performance factors (TPF) in a rectangular channel with square-winged transverse baffles (SW-TB) are presented in this paper. The purpose of this study is to modify the typical transverse baffles (TB) into square-winged transverse baffles (SW-TB) in order to improve the thermal performance and heat transfer rate of the channel. The effects of SW-TBs with various wing attack angles and Reynolds numbers on the heat transfer performance characteristics were examined using a thermochromic li

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Wang, Yazhou, Guoliang Qin, Ximeng Ye, and Zhenzhong Bao. "SEM-based numerical framework for non-Darcy mixed convection in a porous cavity with three adiabatic thin baffles on the hot wall." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 9 (2019): 3366–93. http://dx.doi.org/10.1108/hff-12-2018-0820.

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Purpose The purpose of this paper is to develop a numerical framework based on the accurate spectral element method (SEM) to simulate the mixed convective heat transfer within a porous enclosure with three adiabatic thin baffles of different lengths in nine cases and analyze the effects of several parameters. Design/methodology/approach The authors develop an improved time-splitting method to solve the Darcy–Brinkman–Forchheimer model. No extra assumptions are introduced for the intermediate velocity, and the final velocity field satisfies the incompressible constraint strictly compared with t

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Szemela, Krzysztof, Wojciech P. Rdzanek, and Witold J. Rdzanek. "Acoustic Power Radiated by a System of Two Vibrating Circular Membranes Located at the Boundary of Three-Wall Corner Spatial Region." Archives of Acoustics 37, no. 4 (2012): 463–73. http://dx.doi.org/10.2478/v10168-012-0058-8.

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Abstract Two vibrating circular membranes radiate acoustic waves into the region bounded by three infinite baffles arranged perpendicularly to one another. The Neumann boundary value problem has been investigated in the case when both sources are embedded in the same baffle. The analyzed processes are time harmonic. The membranes vibrate asymmetrically. External excitations of different surface distributions and different phases have been applied to the sound sources’ surfaces. The influence of the radiated acoustic waves on the membranes’ vibrations has been included. The acoustic power of th

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