Development of a flexible forcing immersed boundary lattice boltzmann method and its applications in thermal and particulate flows
Development of a flexible forcing immersed boundary lattice boltzmann method and its applications in thermal and particulate flows
... boundary – lattice Boltzmann method 15 1.6 Applications in thermal and moving boundary problems using immersed boundary – lattice Boltzmann method 17 1.6.1 Natural convection in a complex ... Immersed boundary – thermal lattice Boltzmann method IFEM Immersed finite element method IIM Immersed interface method ISLBM Interpolation-supplemented LBM LGCA lattice gas cellular automata LBE Lattice ... thermal flow problems such that both velocity and temperature boundary conditions are accurately satisfied 1.6 Applications boundary in thermal problems and using moving immersed boundary – lattice...
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Development of a novel immersed boundary lattice boltzmann method and its applications
... Organization of The Thesis 23 Chapter Development of Efficient Lattice Boltzmann Method on Non-Uniform 25 Cartesian Mesh 2.1 Standard LBM 26 2.2 Taylor Series Expansion and Least Squares-base Lattice ... Non -Boundary Conforming Method 1.2.1 Sharp interface approach 1.2.2 Diffuse interface approach 1.2.2.1 Immersed boundary method 1.2.2.2 Force calculation in IBM 1.2.2.3 Advantages and disadvantages ... 1.2.2.3 Advantages and disadvantages of IBM The major advantage of IBM is its simplicity and easy implementation This is attributed to the decoupling of the solution of governing equation with the boundary...
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Development of a miniature low cost UAV helicopter autopilot platform and formation flight control of UAV teams 1
... Miniature UAV helicopter also has special attractiveness to the academic circle because of their smaller size, expendable lower cost, outstanding maneuverability, ease of uses, and wide range of capabilities ... name a few However, due to the highly dynamic behavior of helicopter, limited payload capability and lack of highly accurate sensors, miniature UAVs are still rare Designing a miniature UAV helicopter ... target search and detection in a large area of coverage With a mini -UAV platform being built, it is natural for us to expand our research domain to the formation flight of multiple UAVs, as formation...
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Development of a miniature low cost UAV helicopter autopilot platform and formation flight control of UAV teams 2
... 22 0 23 0 24 0 25 0 190 20 0 21 0 22 0 23 0 24 0 25 0 190 20 0 21 0 22 0 23 0 24 0 25 0 190 20 0 21 0 22 0 Time: s 23 0 24 0 25 0 0.5 0.48 180 0 .24 col 21 0 0.54 0. 52 180 0. 52 δ 20 0 0 .23 0 .22 180 a Inputs of automatic ... 22 0 23 0 24 0 25 0 e UAV angular rates of automatic hovering flight test attitude output φ (deg) 10 −5 180 190 20 0 21 0 22 0 23 0 24 0 25 0 190 20 0 21 0 22 0 23 0 24 0 25 0 190 20 0 21 0 22 0 Time: s 23 0 24 0 25 0 ... yaw rate (deg/s) pitch rate (deg/s) roll rate (deg/s) angular rate output 20 ωx 20 180 190 20 0 21 0 22 0 23 0 24 0 25 0 20 ωy 20 180 190 20 0 21 0 22 0 23 0 24 0 25 0 10 ωz −10 20 180 190 20 0 21 0 22 0...
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Development of immersed boundary phase field lattice boltzmann method for solid multiphase flow interactions
... Remarks 142 vi Chapter Application of Immersed Boundary- Phase Field- Lattice Boltzmann Method for Solid- Multiphase Flow Interactions 161 6.1 Solid- Multiphase Flow Interactions 162 6.2 Simulation ... layer formed on solid surface Chapter presents application of immersed boundary phase- field lattice Boltzmann method to study solid- multiphase flow interactions An introduction of solid- multiphase ... Modeling of Multiphase Flow 1.2.1 Navier-Stokes solvers for multiphase flow simulation 1.2.2 Lattice Boltzmann methods for multiphase flow simulation 1.2.3 Challenges faced by phase- field LBM...
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Development of immersed boundary methods for isothermal and thermal flows 1
... “so-called immersed boundary methods are not real immersed boundary methods and therefore fall out of the scope of the present 13 Chapter Introduction thesis 1. 3 Brief review of Immersed boundary ... function-vorticity formulation-based immersed boundary method; The reported immersed boundary methods for thermal flows are not capable of exactly satisfying the Dirichlet thermal condition on the immersed boundary ... incompressible viscous flows is desired 1. 3.3 Applications of immersed boundary method The popularity of immersed boundary method has seen increased for flow problems with complex or /and moving boundaries...
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Development of immersed boundary methods for isothermal and thermal flows 2
... Δs1 ⎟⎜ 21 Dh N ⎟ ⎜ Dh Δs1 ⎟⎜ ⎟⎜ MN ⎟ ⎜ Dh ⎠ ⎝ DhN 1Δs1 12 Dh 22 Dh DhM 12 Dh Δs2 22 Dh Δs2 DhN Δs2 DhM ΔsM ⎞ ⎟ Dh M ΔsM ⎟ ⎟ ⎟ NM Dh ΔsM ⎟ ⎠ (2. 25) ⎛ U n +1 B ,1 ⎜ n +1 U [B F ] = ⎜ B ,2 ⎜ ⎜ n ... (2. 28) ρU ∞ D 43 Chapter Governing Equations and Boundary Condition-Enforced IBM CL = FL (2. 29) ρU ∞ D where FD and FL are the drag and lift forces on the cylinder surface For unsteady flows, ... (20 09) and Zhou & Shu (20 11) The variation of time-mean drag and r.m.s value of lift and drag versus fc / f s also match well with the results from Guilmineau et al (20 02) , Lee et al (20 09) and...
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Development of immersed boundary methods for isothermal and thermal flows 3
... ∂x (3. 3) and the stream function is related to the velocity by u= ∂ϕ ∂y v=− (3. 4) ∂ϕ ∂x (3. 5) Note that ω + Θ in Eq (3. 3) is the physical vorticity Eqs (3. 1) to (3. 5) together with Eqs (2 .3) and ... (3. 8) and (3. 9) and obtain predicted vorticity ω * and stream function ϕ * ; 2) Substitute ϕ * to Eqs (3. 4) and (3. 5) to calculate the predicted velocity * field u ; 3) Compute the elements of ... Substituting Eqs (3. 10) and (3. 11) into Eq (3. 3) and using Eq (3. 9) gives Θ= ∂ ( Δu ) ∂ ( Δ v ) − ∂y ∂x (3. 12) It should be noted that the key step in the proposed stream function-vorticity formulation-based...
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Development of immersed boundary methods for isothermal and thermal flows 4
... = TB (X(s, t ), t ) (4. 4) Here Eqs (4. 1a), (4. 2), (4. 3) describe forced convection problems while Eqs (4. 1b), (4. 2), (4. 3) describe natural convection problems In Eq (4. 1b), the Boussinesq approximation ... ∫ − T Γ total Γ Lref (4. 22) where Ltotal is the total length of the immersed boundary Ltotal = ∫ Γ (4. 23) ds As shown in Eqs (4. 21) and (4. 22), the evaluation of local and average Nusselt numbers ... gap space 4. 4 Conclusions In this chapter, a boundary condition-enforced immersed boundary method is developed for heat transfer problems The effect of thermal boundaries on the flow and temperature...
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Development of immersed boundary methods for isothermal and thermal flows 5
... releases constant and uniform heat flux is simulated for several low and moderate Reynolds numbers of 1 35 Chapter An Efficient IBM for Thermal Flow Problems with Heat Flux Boundary Condition ... investigations are carried out for three Rayleigh numbers of Ra = 1000, 57 00 and 5 10 while Prandtl number is kept at Pr = 0.7 The initial conditions are set as zero for u and T∞ for T in the whole computational ... Ra = 57 00 Ra = 5 10 Fig 5. 6 Streamlines (left) and isotherms (right) for different Ra 148 Chapter An Efficient IBM for Thermal Flow Problems with Heat Flux Boundary Condition θ Fig 5. 7 Effect...
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Development of immersed boundary methods for isothermal and thermal flows 6
... in Fig 6. 10 To get a clear view of the ground effect on the aerodynamic forces, C H 161 Chapter Applications of Developed IBM Solvers to Simulate 2D Fluid and Thermal Flows and CV for the ... (see Fig 6. 25(a) and Fig .6. 25(c) for comparison), but higher vibration frequencies play a role of progressively reducing the longitudinal vortex spacing (see Fig 6. 26( b) and Fig 6. 25(c) for comparison) ... Fig 6. 13 The development of vortex structure in the forth stroke at Gc = 199 Chapter Applications of Developed IBM Solvers to Simulate 2D Fluid and Thermal Flows Fig 6. 14 Comparison of time-dependent...
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Development of immersed boundary methods for isothermal and thermal flows 7
... (20 07) reported the variation of the drag and lift forces for Reynolds number of 50, 100 and 200 Yoon & Yang (20 07) , by performing a parametric study, estimated flow-induced forces on two 2 27 ... terms of temperature contours (isotherms) in Figs 7. 3 and 7. 4, for isothermal condition and isoflux condition, respectively As expected, the isotherms are symmetric about the centerline for both ... of Developed IBM Solvers to Simulate 3D Incompressible Thermal Flows Table 7. 6 Comparison of the time-mean drag and lift coefficients for tandem-sphere system at Re = 300 CD CL Upstream 0. 677 ...
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Development of immersed boundary methods for isothermal and thermal flows 8
... overall width of the wake is larger The time-dependent hydrodynamic forces experienced by the fish for Re = 300 and 4000 are plotted in Figs 8. 18( a) and 8. 18( b), respectively, in forms of force coefficient ... cases of St = 0 .8 and 1.0 in Figs 8. 10(b) and 8. 10(c), a diamond-shaped region of high velocity exists immediately behind the flapping foil and there is no evidence of clear bifurcation for this ... other values of St = 0.35, 0 .8 and 1.0 are carried out for AR = The top views of the vortex structures for these cases are presented in Fig 8. 9 In combination with the plot in Fig 8. 4 for St = 0.6...
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Development of immersed boundary methods for isothermal and thermal flows 9
... ( 199 7) 2807-28 19 Liu H., Wassersug R.J., Kawachi K., A computational fluid dynamics study of tadpole swimming, J Exp Biol., 199 ( 199 6) 1245-1260 Ljachowski D.N., J techn Phys., Leningrad, 99 9 ... Stability of flows past a pair of circular cylinders in a side-by-side arrangement, J Fluid Mech., 595 (2008) 491 -507 Mohd-Yusof J., Combined immersed boundaries/B-Splines methods for simulations of flows ... correction-based immersed boundary- lattice Boltzmann method and its applications, J Comp Phys., 228 (20 09) 196 3- 197 9 Wu J., Shu C., Particulate flow simulation via a boundary condition-enforced immersed boundary- lattice...
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Từ khóa: development of a regional risk management framework for apec economies for use in the control and prevention of introduced marine pestsdevelopment of a spoken languagedevelopment of a recipe management systemthe design and development of a solar powered refrigeratorwhat is the role of mass communication in the development of a countrythe role of communication in economic development of a societythe role of transportation and communication in economic development of a countrydescribe the development of a seed from the ovule and embryo sacrole of agriculture sector in economic development of a developing countrydevelopment of a human embryo from fertilization to implantationdesign and development of a productdevelopment of a method to measure consumer emotions associated with foodsdevelopment of a cation exchange purification step for an fc fusion proteinthe development of a differential extraction procedure87 vhdl model of a 74x74 like d flip flop with preset and clearNghiên cứu sự hình thành lớp bảo vệ và khả năng chống ăn mòn của thép bền thời tiết trong điều kiện khí hậu nhiệt đới việt namNghiên cứu tổ chức pha chế, đánh giá chất lượng thuốc tiêm truyền trong điều kiện dã ngoạiNghiên cứu tổ hợp chất chỉ điểm sinh học vWF, VCAM 1, MCP 1, d dimer trong chẩn đoán và tiên lượng nhồi máu não cấpNghiên cứu vật liệu biến hóa (metamaterials) hấp thụ sóng điện tử ở vùng tần số THzBiện pháp quản lý hoạt động dạy hát xoan trong trường trung học cơ sở huyện lâm thao, phú thọGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitĐỒ ÁN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWANPhát triển mạng lưới kinh doanh nước sạch tại công ty TNHH một thành viên kinh doanh nước sạch quảng ninhTrả hồ sơ điều tra bổ sung đối với các tội xâm phạm sở hữu có tính chất chiếm đoạt theo pháp luật Tố tụng hình sự Việt Nam từ thực tiễn thành phố Hồ Chí Minh (Luận văn thạc sĩ)Phát hiện xâm nhập dựa trên thuật toán k meansTìm hiểu công cụ đánh giá hệ thống đảm bảo an toàn hệ thống thông tinChuong 2 nhận dạng rui roTăng trưởng tín dụng hộ sản xuất nông nghiệp tại Ngân hàng Nông nghiệp và Phát triển nông thôn Việt Nam chi nhánh tỉnh Bắc Giang (Luận văn thạc sĩ)Tranh tụng tại phiên tòa hình sự sơ thẩm theo pháp luật tố tụng hình sự Việt Nam từ thực tiễn xét xử của các Tòa án quân sự Quân khu (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtTrách nhiệm của người sử dụng lao động đối với lao động nữ theo pháp luật lao động Việt Nam từ thực tiễn các khu công nghiệp tại thành phố Hồ Chí Minh (Luận văn thạc sĩ)BÀI HOÀN CHỈNH TỔNG QUAN VỀ MẠNG XÃ HỘIĐổi mới quản lý tài chính trong hoạt động khoa học xã hội trường hợp viện hàn lâm khoa học xã hội việt namHIỆU QUẢ CỦA MÔ HÌNH XỬ LÝ BÙN HOẠT TÍNH BẰNG KIỀM