Faculty Profiles - YAMAMOTO, Kazuhiro

Papers - YAMAMOTO, Kazuhiro

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格子ボルツマン法による燃焼場の解析方法と応用例 Invited

山本和弘

計算数理工学レビュー page： 29-38 2005

Soot Accumulation and Combustion in Porous Media Reviewed

K. Yamamoto and F. Ochi

Progress in Computational Heat and Mass Transfer Vol. 1 page： 566-571 2005

Combustion Simulation with Lattice Bolzmann Method in a Three-Dimensional Porous Structure Reviewed

K. Yamamoto, N. Takada, and M. Misawa

Proceedings of the Combustion Institute Vol. 30 page： 1509-1515 2005

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

To simulate the flow in three dimensional porous structure, we have applied the Lattice Boltzmann method (LBM), using a D3Q15 model. The distribution function for flow, temperature, and concentration fields are solved to simulate the regeneration process of DPF. For a benchmark study, we have conducted the calculation in simple geometry. To change the flow characteristics such as porosity and tortuosity, the obstacles of different number and size are selected, which are randomly placed in the duct. The flow pattern is changed with different size of obstacles even at the same porosity. To confirm the validity of our calculation, the results are compared in the non-dimensional form with the Blake-Kozeny and Ergun equations, using the Ergun coordinates of Reynolds number and friction factor. Numerical results show good agreements with the Blake-Kozeny equation, although the friction factor is increased with larger obstacles. The soot combustion is well simulated to show the effects of oxygen on the reaction rate. Finally, the real porous geometry has been tested. The 3D CT technique is used to obtain tomography data of Ni-Cr metal. Results show that, the inhomogeneous flow is observed, and there are regions where the temperature is locally higher. This information is indispensable for the better design of DPF. LBM can be a good tool for combustion simulation in porous media.

Discrete Simulation of Reactive Flow with Lattice GasAutomata Reviewed

Kazuhiro Yamamoto

IEICE Trans. on Inf. Systems, Special Issue of IEICE on Cellular Automata, Vol.E87-D, No.3 Vol. 87 ( 3 ) page： 740-744 2004

Combustion Simulation using the Lattice Boltzmann Method Reviewed

K. Yamamoto, X. He, and G. D. Doolen

JSME International Journal, Series B Vol. 47 ( 2 ) page： 403-409 2004

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Even though laser diagnostics have significantly improved and can obtain an instantaneous 2D flame image of the velocity field, it is still difficult to obtain data such as scalar flux or reaction rates experimentally. It is also essential to understand 3D flame structures in turbulent combustion. Chemically non-reacting turbulent flows are complex and chemical reactions make the problem more complicated. Due to practical limitations of computational costs, conventional numerical methods are very expensive for carrying out 3D numerical simulations at high Reynolds numbers with detailed chemical reactions. In this study, we have used the lattice Boltzmann method (LBM) to simulate a combustion field. The LBM is an efficient alternative for the numerical simulation of this type of flow. To confirm the validity of the LBM, a flame in simple flow geometry is simulated and the laminar burning velocity is obtained. Both 2D and 3D simulations have been completed. A jet flame has been also simulated to demonstrate the LBM capability of simulating unsteady flames with vortices. The scheme with detailed chemistry has been tested for simulation of a counter-flow flame.

多孔体内部の流れと燃焼反応の数値計算 Reviewed

山本和弘

流体力学会誌ながれ23 page： 295-302 2004

Two-phase Automaton for Porous Structure and Combustion Simulation Reviewed

K. Yamamoto

Lecture Notes in Computer Science, 3305 page： 220-229 2004

Two-Phase Automata for Porous Structure and Combustion Simulation Reviewed

K. Yamamoto

Sixth Int. Conference on Cellular Automata for Research and and Industry 2004

Combustion Simulation with Lattice Bolzmann Method in a Three-Dimensional Porous Structure Reviewed

K. Yamamoto, N. Takada, and M. Misawa

30th Int. Symposium on Combustion, Book of abstract page： 96-97 2004

LB Simulation on Soot Combustion in Porous Media Reviewed

K. Yamamoto, and N. Takada

13th Int. Conference on the Discrete Simulation of Fluid Dynamics 2004

部分予混合雰囲気中における可燃性固体の燃え拡がり，―火炎先端への燃料の拡散の重要性― Reviewed

山本和弘・瀬尾哲・小沼義昭

日本燃焼学会誌 Vol. 45 ( 131 ) page： 41-48 2003

Persistence of Laminar Flamelet Structure Under Highly Turbulent Combustion Reviewed

K. Yamamoto, Y. Nishizawa, Y. Onuma

JSME International Journal,Series B Vol. 147 ( 6 ) page： 408-415 2003

燃料を添加した部分予混合雰囲気中の可燃性固体の燃え拡がり Reviewed

山本和弘，瀬尾哲，森幸一，小沼義昭

日本機械学会論文集（B編） Vol. 69 ( 684 ) page： 1951-1957 2003

格子ボルツマン法による燃焼場の計算 Invited

山本和弘

日本燃焼学会誌 Vol. 45 ( 131 ) page： 34-39 2003

Temperature of Positively and Negatively Stretched Flam Reviewed

K. Yamamoto, S. Ishizuka

JSME International Journal, Series B Vol. 146 ( 1 ) page： 198-205 2003

LB Simulation on Combustion with Turbulence Reviewed

K. Yamamoto

InternationalJournal of Modern Physics B, Nos. 1&2, page： 197-200 2003

可燃性固体の燃え拡がりに及ぼす周囲雰囲気の影響（第２報，希釈の影響と気相の温度測定） Reviewed

山本和弘，森幸一，小沼義昭

日本機械学会論文集（B編） Vol. 69 ( 680 ) page： 946-953 2003

可燃性固体の燃え拡がりに対するモデルの検討 Reviewed

山本和弘

日本機械学会論文集 Vol. 69 ( 680 ) page： 954-961 2003

格子ボルツマン法による燃焼場の計算，連載講座－燃焼の新しいシミュレーション法Ⅲ－ Reviewed

山本和弘

日本燃焼学会誌 Vol. 45 ( 131 ) page： 34-39 2003

Combustion Simulation using the Lattice Boltzmann Method Reviewed

K. Yamamoto, X. He, and G. D. Doolen

3rd Joint Meeting of the U.S. Sections of the Combustion Institute, B33 page： 41 2003

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