Lattice Boltzmann simulation to laminar pulsating flow past a circular cylinder with constant temperature

Zheng, Youqu; Li, Guoneng; Guo, Wenwen; Dong, Chunyan

doi:10.1007/s00231-017-2043-2

Cited by 9 publications

(17 citation statements)

References 26 publications

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“…Authors [18] conclude that heat transfer increases when the forced pulsation frequencies are synchronized with the natural frequencies of vortex oscillations (the phenomenon of vortex resonance) [20]. Heat transfer enhancement is mainly observed in the back of the cylinder, in work [19] in the front of the cylinder. Heat transfer increases with an increase in the pulsating frequency.…”

Section: Introductionmentioning

confidence: 99%

“…The maximum values of the instantaneous Nusselt number are observed at pulsation phases corresponding to the maximum flow velocity. Fu et al and Zheng et al [18,19] investigated the heat transfer of a single cylinder in a pulsating flow numerically. Authors [18] conclude that heat transfer increases when the forced pulsation frequencies are synchronized with the natural frequencies of vortex oscillations (the phenomenon of vortex resonance) [20].…”

Section: Introductionmentioning

confidence: 99%

“…A further increase in the pulsation frequency leads to a decrease in heat transfer intensification. The authors [17][18][19] noted that the maximum instantaneous values of the Nusselt number are observed at pulsation phases corresponding to the maximum flow velocities. The heat transfer of a single square cylinder in a pulsating flow was experimentally investigated by Ji et al [20].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Local Heat Transfer Dynamics in the In-Line Tube Bundle under Asymmetrical Pulsating Flow

Haibullina¹,

Hayrullin²,

Balzamov³

et al. 2022

Preprint

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The pulsating flow is one of the techniques which can enhance heat transfer, therefore leading to energy saving in tubular heat exchangers. This paper investigates the heat transfer and flow characteristics in a two-dimensional in-line tube bundle with the pulsating flow by a numerical method using the Ansys Fluent. Numerical simulation is performed for Reynolds number Re = 500 with different frequencies and amplitude of pulsation. Heat transfer enhancement was estimated from the central tube of the tube bundle. Pulsation velocity had an asymmetrical character with a reciprocating flow. The technique developed by the authors to obtain asymmetric pulsations was used. This technique allows simulating an asymmetric flow in heat exchangers equipped with a pulsation generation system. Increase in both the amplitude and the frequency of the pulsations has a significant effect on heat transfer enhancement. Heat transfer enhancement is mainly observed in the front and back of the cylinder. At a steady flow in these areas, heat transfer is minimal due to the weak circulation of the flow. The increase in heat transfer in the front and back of the cylinder is associated with increased velocity and additional flow mixing in these areas.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Local Heat Transfer Dynamics in the In-Line Tube Bundle under Asymmetrical Pulsating Flow

Haibullina¹,

Hayrullin²,

Balzamov³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Thus a large number of experimental [1][2][3] and numerical investigations mainly concentrated on an isolated single cylinder or two cylinders for pure forced convection and mixed convection. Particularly for the pure forced convection, several adjustable parameters such as the transverse separation ratio, the arrangement of circular or square cylinders, the attack angle, the blockage ratio, the power-law index, the Prandtl number, the Reynolds number and different inlet or wall boundary conditions, are regarded as vital factors to explore the flow and heat transfer mechanisms [4][5][6][7].In addition to the above adjustable parameters, the thermal buoyancy is also a crucial factor since the vortex patterns and the interactions between adjacent cylinders can change dramatically and further affect the flow dynamics and heat transfer efficiency [8][9][10][11][12][13][14]. For example, Sanyal and Dhiman [8] investigated the influences of the transverse gap ratio (0.7-10) and the Richardson number (0-1) for a flow through a pair of side-by-side square cylinders, and further gave a detailed explanation of the wake interaction phenomenon within a buoyancy-driven cross flow.…”

Section: Introductionmentioning

confidence: 99%

An LBM-based investigation of thermal buoyancy and arrangement angle on flow characteristics and heat transfer over four heated square cylinders

Zhang

Xie

Sundén

et al. 2021

Numerical Heat Transfer, Part B: Fundamentals

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In this work, the effects of thermal buoyancy and rotation angle on the hydrodynamics and mixed convection heat transfer characteristics over four heated identical square cylinders placed in a parallel horizontal channel are numerically studied. For the flow field, the Lattice Boltzmann method (LBM) with multiple relaxation time collision operator (MRT) is implemented and the Bhatnagar-Gross-Ktook collision operator (BGK) is adopted for the thermal field simulation. The distance between two adjacent square cylinders is fixed for a parametric study and a uniform velocity is imposed at the inlet region. Ranges of the influence parameters are defined as: a ¼ 45 , 90 , 120 ; 50 Re 150; 0 Ri 0.5. Several flow and heat transfer parameters including the time-averaged lift/drag coefficients, the global time-averaged Nusselt number and the distributions of local Nusselt number are analyzed, respectively. The vorticity and isotherm patterns are also plotted to illustrate the visual disturbance of the thermal buoyancy and the rotation angle on the flow and thermal fields. Numerical results show that the flow and thermal patterns for all arrangements become disordered and nonsystematic with the introduction of thermal buoyancy, and the thermal pattern for the downstream cylinders has an upward drift in the wake region. The time-averaged lift coefficient for each square cylinder is relatively sensitive to the influence parameters and the arrangement, and it is always less than zero when the Richardson number is not equal to zero. The global timeaveraged Nusselt number is directly proportional to the Reynolds number and Richardson number, and the local Nusselt numbers on the front and rear faces for each square cylinder reach a maximum and minimum, respectively. It is also observed that the distribution of local Nusselt number for all rotation angles is intensively affected by the thermal buoyancy.

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“…Di erent lattice con gurations for LB method have been introduced to solve di erential equations including D1Q2 and D1Q3 for one-dimensional problems and D2Q4, D2Q5, and D2Q9 for two-dimensional problems [15{17]. Numerous studies have been performed to solve mass transport problems, i.e., advection-dispersion equations, using LB methods, e.g., Zhou [18], Yoshida and Nagaoka [19], Perko and Patel [20], Hosseini et al [21], Zheng et al [22], and Bin et al [23]. In some of these studies, the concept of Single Relaxation Time (SRT) has been employed in the mathematical formulations [18,20{22].…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann solution of advection-dominated mass transport problem: a comparison

et al. 2018

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This article addresses the abilities and limitations of the Lattice Boltzmann (LB) method in solving advection-dominated mass transport problems. Several schemes of the LB method, including D2Q4, D2Q5, and D2Q9, were assessed in the simulation of two-dimensional advection-dispersion equations. The concepts of Single Relaxation Time (SRT), Multiple Relaxation Time (MRT), and linear and quadratic Equilibrium Distribution Functions (EDF) were taken into account. The results of LB models were compared to the well-known Finite Di erence (FD) solutions, including Explicit Finite Di erence (EFD) and Crank-Nicolson (CN) methods. All LB models are more accurate than the aforementioned FD schemes. The results also indicate the high potency of D2Q5 SRT and D2Q9 SRT in describing advection-controlled mass transfer problems. The numerical arti cial oscillations are observed when the Grid Peclet Number (GPN) is greater than 10, 25, 20, 25, and 10 regarding D2Q4 SRT, D2Q5 SRT, D2Q5 MRT, D2Q9 SRT, and D2Q9 MRT, respectively, while the corresponding GPN values obtained for the EFD and CN methods were 2 and 5, respectively. Finally, several LB models were used to satisfactorily solve a coupled system of groundwater and solute transport equations. In terms of computational time, all LB models are much faster than CN method.

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Lattice Boltzmann simulation to laminar pulsating flow past a circular cylinder with constant temperature

Cited by 9 publications

References 26 publications

Local Heat Transfer Dynamics in the In-Line Tube Bundle under Asymmetrical Pulsating Flow

Local Heat Transfer Dynamics in the In-Line Tube Bundle under Asymmetrical Pulsating Flow

An LBM-based investigation of thermal buoyancy and arrangement angle on flow characteristics and heat transfer over four heated square cylinders

Lattice Boltzmann solution of advection-dominated mass transport problem: a comparison

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