S. Guo, Yongliang Feng, Jérôme Jacob, F. Renard, Pierre Sagaut. An efficient lattice Boltzmann method for compressible aerodynamics on D3Q19 lattice. Journal of Computational Physics, Elsevier, 2020, 418, pp.109570. ⟨10.1016/j.jcp.2020.109570⟩. ⟨hal-02960161⟩ Plus de détails...
An efficient lattice Boltzmann (LB) model relying on a hybrid recursive regularization (HRR) collision operator on D3Q19 stencil is proposed for the simulation of three-dimensional high-speed compressible flows in both subsonic and supersonic regimes. An improved thermal equilibrium distribution function on D3Q19 lattice is derived to reduce the complexity of correcting terms. A simple shock capturing scheme and an upwind biased discretization of correction terms are implemented for supersonic flows with shocks. Mass and momentum equations are recovered by an efficient streaming, collision and forcing process on D3Q19 lattice. Then a non-conservative formulation of the entropy evolution equation is used, that is solved using a finite volume method. The proposed method is assessed considering the simulation of i) 2D isentropic vortex convection, ii) 3D non-isothermal acoustic pulse, iii) 2D supersonic flow over a bump, iv) 3D shock explosion in a box, v) 2D vortex interaction with shock wave, vi) 2D laminar flows over a flat plate at Ma of 0.5, 1.0 and 1.5.
S. Guo, Yongliang Feng, Jérôme Jacob, F. Renard, Pierre Sagaut. An efficient lattice Boltzmann method for compressible aerodynamics on D3Q19 lattice. Journal of Computational Physics, Elsevier, 2020, 418, pp.109570. ⟨10.1016/j.jcp.2020.109570⟩. ⟨hal-02960161⟩
Y. Feng, S. Guo, J. Jacob, P. Sagaut. Grid refinement in the three-dimensional hybrid recursive regularized lattice Boltzmann method for compressible aerodynamics. Physical Review E , American Physical Society (APS), 2020, 101 (6), pp.063302. ⟨10.1103/PhysRevE.101.063302⟩. ⟨hal-02892273⟩ Plus de détails...
Grid refinement techniques are of paramount importance for computational fluid dynamics approaches relying on the use of Cartesian grids. This is especially true of solvers dedicated to aerodynamics, in which the capture of thin shear layers require the use of small cells. In this paper, a three-dimensional grid refinement technique is developed within the framework of hybrid recursive regularized lattice Boltzmann method (HRR-LBM) for compressible high-speed flows, which is an efficient collide-stream-type method on a compact D3Q19 stencil. The proposed method is successfully assessed considering several test cases, namely, an isentropic vortex propagating through transition interface, shock-vortex interaction with intersection between grid refinement interface and shock corrugation, and transonic flows over three-dimensional DLR-M6 wing with seven levels of grid refinement.
Y. Feng, S. Guo, J. Jacob, P. Sagaut. Grid refinement in the three-dimensional hybrid recursive regularized lattice Boltzmann method for compressible aerodynamics. Physical Review E , American Physical Society (APS), 2020, 101 (6), pp.063302. ⟨10.1103/PhysRevE.101.063302⟩. ⟨hal-02892273⟩
Yongliang Feng, S. Guo, Jérôme Jacob, Pierre Sagaut. Solid wall and open boundary conditions in hybrid recursive regularized lattice Boltzmann method for compressible flows. Physics of Fluids, American Institute of Physics, 2019, 31 (12), pp.126103. ⟨10.1063/1.5129138⟩. ⟨hal-02467965⟩ Plus de détails...
Complex geometries and open boundaries have been intensively studied in the nearly incompressible lattice Boltzmann method (LBM) framework. Therefore, only few boundary conditions for the high speed fully compressible LBM have been proposed. This paper deals with the definition of efficient boundary conditions for the compressible LBM methods, with the emphasis put on the newly proposed hybrid recursive regularized D3Q19 LBM (HRR-LBM) with applications to compressible aerodynamics. The straightforward simple extrapolation-based far-field boundary conditions, the characteristic boundary conditions, and the absorbing sponge layer approach are extended and estimated in the HRR-LBM for the choice of open boundaries. Moreover, a cut-cell type approach to handle the immersed solid is proposed to model both slip and no-slip wall boundary conditions with either isothermal or adiabatic behavior. The proposed implementations are assessed considering the simulation of (i) isentropic vortex convection with subsonic to supersonic inflow and outflow conditions, (ii) two-dimensional (2D) compressible mixing layer, (iii) steady inviscid transonic flow over a National Advisory Committee for Aeronautics (NACA) 0012 airfoil, (iv) unsteady viscous transonic flow over a NACA 0012 airfoil, and (v) three-dimensional (3D) transonic flows over a German Aerospace Center (DLR) F6 full aircraft configuration.
Yongliang Feng, S. Guo, Jérôme Jacob, Pierre Sagaut. Solid wall and open boundary conditions in hybrid recursive regularized lattice Boltzmann method for compressible flows. Physics of Fluids, American Institute of Physics, 2019, 31 (12), pp.126103. ⟨10.1063/1.5129138⟩. ⟨hal-02467965⟩
Z Mi, Z. Zhao, S Woo, M. Bugnet, M Djavid, et al.. Molecular beam epitaxial growth and characterization of Al(Ga)N nanowire deep ultraviolet light emitting diodes and lasers. Journal of Physics D: Applied Physics, IOP Publishing, 2016, 49 (36), pp.364006. ⟨hal-01973292⟩ Plus de détails...
Z Mi, Z. Zhao, S Woo, M. Bugnet, M Djavid, et al.. Molecular beam epitaxial growth and characterization of Al(Ga)N nanowire deep ultraviolet light emitting diodes and lasers. Journal of Physics D: Applied Physics, IOP Publishing, 2016, 49 (36), pp.364006. ⟨hal-01973292⟩
H. Guo, Yvan Wyart, J. Pérot, F. Nauleau, Philippe Moulin. Magnetic nanoparticles for UF membrane integrity: industrial scale. Medical Engineering and Physics, Elsevier, 2011, 2 (1), pp.51-61. ⟨10.12989/mwt.2011.2.1.051⟩. ⟨hal-01026454⟩ Plus de détails...
An alternative ultrafiltration membrane integrity test was already developed in laboratory scale. It is based on the use of magnetic nanoparticles (Fe3O4) and measurement of magnetic susceptibility. The mean size of nanoparticles used is around 35 nm and they show a good disparity between 20 and 100 nm. In this paper, validation of this membrane integrity monitoring method was achieved by industrialscale tests. Two holes with 0.6 mm internal diameter in a module containing 10 000 fibers (35 m2 surface area) was efficiently detected by injecting 750 mL of 1.7 g.L−1 nanoparticle solution during 2s when the test was operated at low TMP (0.096 bar, corresponding to a flux of 2.2 m3.h−1). In addition, it has been demonstrated that within the detectable range, this membrane integrity test with magnetic nanoparticles has a very rapid response time. The response time depends on the permeate flux and the dead-volume of the pilot. This membrane integrity test, with the advantages of on-line operation, high detection sensitivity, detection specificity and very low influence on membrane fouling, seems to be suitable for large scale drinking water plants.
H. Guo, Yvan Wyart, J. Pérot, F. Nauleau, Philippe Moulin. Magnetic nanoparticles for UF membrane integrity: industrial scale. Medical Engineering and Physics, Elsevier, 2011, 2 (1), pp.51-61. ⟨10.12989/mwt.2011.2.1.051⟩. ⟨hal-01026454⟩
H. Guo, Yvan Wyart, J. Perot, F. Nauleau, Philippe Moulin. Application of magnetic nanoparticles for UF membrane integrity monitoring at low-pressure operation. Journal of Membrane Science, Elsevier, 2010, 350 (1-2), pp.172-179. ⟨10.1016/j.memsci.2009.12.025⟩. ⟨hal-01025137⟩ Plus de détails...
An alternative ultrafiltration membrane integrity test is presented and evaluated, based on the use of magnetic nanoparticles (Fe3O4) and measurement of magnetic susceptibility. The mean size of nanoparticles used is around 35 nm and they show a good disparity between 20 and 100 nm. A series of integrity tests were carried out on a Norit membrane module containing 100 fibers under a low transmembrane pressure of 0.25 bar. The results showed that no magnetic susceptibility was detected in permeate when the tests were performed on the intact module in both cross-flow and dead-end filtration, indicating the complete nanoparticle retention by the intact module. However, when even one fiber was broken in the module (1% breakage rate), magnetic susceptibility of permeate could be detected instantaneously even at feed concentrations as low as 1.2 ppm with Bartington magnetic susceptibility meter. This detection is valid during all the filtration process. The results also showed that the membrane permeability could be completely recovered after a backwash. This membrane integrity test, with the advantages of simplicity, on-line operation, high detection specificity and sensitivity, quick detection and very low influence on membrane fouling, seems to be suitable for large-scale drinking water plants.
H. Guo, Yvan Wyart, J. Perot, F. Nauleau, Philippe Moulin. Application of magnetic nanoparticles for UF membrane integrity monitoring at low-pressure operation. Journal of Membrane Science, Elsevier, 2010, 350 (1-2), pp.172-179. ⟨10.1016/j.memsci.2009.12.025⟩. ⟨hal-01025137⟩
H. Guo, Yvan Wyart, J. Perot, F. Nauleau, Philippe Moulin. Low-pressure membrane integrity tests for drinking water treatment: a review. Water Research, IWA Publishing, 2010, 44 (1), pp.41-57. ⟨10.1016/j.watres.2009.09.032⟩. ⟨hal-01025143⟩ Plus de détails...
Low-pressure membrane systems, including microfiltration (MF) and ultrafiltration (UF) membranes, are being increasingly used in drinking water treatments due to their high level of pathogen removal. However, the pathogen will pass through the membrane and contaminate the product if the membrane integrity is compromised. Therefore, an effective on-line integrity monitoring method for MF and UF membrane systems is essential to guarantee the regulatory requirements for pathogen removal. A lot of works on low-pressure membrane integrity tests have been conducted by many researchers. This paper provides a literature review about different low-pressure membrane integrity monitoring methods for the drinking water treatment, including direct methods (pressure-based tests, acoustic sensor test, liquid porosimetry, etc.) and indirect methods (particle counting, particle monitoring, turbidity monitoring, surrogate challenge tests). Additionally, some information about the operation of membrane integrity tests is presented here. It can be realized from this review that it remains urgent to develop an alternative on-line detection technique for a quick, accurate, simple, continuous and relatively inexpensive evaluation of low-pressure membrane integrity. To better satisfy regulatory requirements for drinking water treatments, the characteristic of this ideal membrane integrity test is proposed at the end of this paper.
H. Guo, Yvan Wyart, J. Perot, F. Nauleau, Philippe Moulin. Low-pressure membrane integrity tests for drinking water treatment: a review. Water Research, IWA Publishing, 2010, 44 (1), pp.41-57. ⟨10.1016/j.watres.2009.09.032⟩. ⟨hal-01025143⟩
