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Solution of N-S equations based on the quadtree cut cell method

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Science China(Physics,mechanics & Astronomy) 2009年第6期52卷 877-884页

作者： kase Kiwamu Volume CAD modeling Team RIKEN Institute

With the characteristic of the quadtree data structure, a new mesh generation method, which adopts square meshes to decompose a background domain and a cut cell approach to express arbitrary boundaries, is proposed to keep the grids generated with a good orthogonality easily. The solution of N-S equations via finite volume method for this kind of unstructured meshes is derived. The mesh generator and N-S solver are implemented to study two benchmark cases, i.e. a lid driven flow within an inclined square and a natural convection heat transfer flow in a square duct with an inner hot circular face. The simulation results are in agreement with the benchmark values, verifying that the present methodology is valid and will be a strong tool for two-dimensional flow and heat transfer simulations, especially in the case of complex boundaries.

关键词： quadtree cut cell N-S equations finite volume method

Vascular anomaly in the levator aponeurosis of neurofibromatosis type 1

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International Journal of Ophthalmology(English edition) 2017年第4期10卷 656-657页

作者： Satoru kase Toshiya Shinohara mika Noda Susumu Ishida manabu kase Department of Ophthalmology Teine Keijinkai HospitalSapporo 006-0811 Japan Department of Ophthalmology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo 060-8638 Japan Department of Surgical Pathology Teine Keijinkai HospitalSapporo 006-0811 Japan

Dear Editor,I am Satoru kase,from the Department of Ophthalmology,Faculty of medicine and Graduate School of medicine,Hokkaido University,Sapporo City,Japan.I write to present a case of neurofibromatosis type 1（NF1）... 详细信息

关键词： Vascular anomaly in the levator aponeurosis of neurofibromatosis type 1 NF Figure type

An efficient algorithm for detecting particle contact in non-uniform size particulate system

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Particuology 2010年第2期8卷 127-132页

作者： Luyi Lu Zhaolin GU Kangbin Lei Sheng Wang Kiwamu kase School of Energy and Power En~neering Xi'anJiaotong University Xi'an 710049 China VCAD modeling Team VCAD System Research Program RIKEN 351-0198. Japan

Algorithms for detecting particle collision play an important role in the discrete element method （DEm） for the simulation of granular flow systems since the time taken to detect the contact pairs usually occupies a considerable proportion of the total CPU time for the simulation. In this study, we developed a new octree algorithm called multi-octree algorithm, for detecting candidate contact pairs. The so-called multi- octree algorithm adopts the topology of octree for detecting possible contacts, in which the particles are managed by hierarchical classification according to particle size and then mapped to different level nodes of an octree, instead of mapping all particles into the leaf nodes of an octree in Vemuri-octree algorithm. The present algorithm speeds up the detecting process by reducing the number of candidate particles for possible contacts. A non-uniform size particulate system with three particle sizes was simulated by the multi-octree and the Vemuri-octree algorithms simultaneously. The simulation results showed that the multi-octree algorithm is relatively insensitive to the volumetric fraction of particles and particle shapes, and takes much shorter time to find candidate particles for possible contacts than the Vemuri-octree algorithm for non-uniform size particulate systems. 2009 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

关键词： Particle collisionNon-uniform size particlesOctree

Histological observation in pachyvessels in a patient with choroidal melanoma

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International Journal of Ophthalmology(English edition) 2021年第5期14卷 777-779页

作者： Satoru kase Kousuke Noda Susumu Ishida Department of Ophthalmology Faculty of Medicine and Graduate School of MedicineHokkaido UniversitySapporo 060-8638Japan

Dear Editor,I am *** kase,from the Department of Ophthalmology,Faculty of medicine and Graduate School of medicine,Hokkaido University.I write to present a case of choroidal melanoma arising from a thickened ***"pachychoroid"has recently been proposed as an entity comprising an increase in the choroidal thickness and dilatation of large choroidal vessels(so-called pachyvessels)[1].

关键词： choroidal melanoma medicine

Viscous micropump Simulation by Particle/Continuum methods

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Journal of Shanghai Jiaotong university(Science) 2011年第3期16卷 364-367页

作者：王盛罗昔联雷康斌顾兆林 kase Kiwamu Integrated Volume CAD System Research Program RIKEN Institute School of Human Settlement and Civil Engineering Xi'an Jiaotong University

A novel viscous micropump consisting of a cylindrical rotor eccentrically placed inside a microchannel is simulated by the two Volume-CAD(V-CAD)framework-based flow solvers,i.e.,the direct simulation monte Carlo(DSmC)package(named as V-DSmC)and the Navier-Stoke solver(named as V-Flow).V-DSmC is used in the case of the pump applied to gas,while V-Flow is applied to model the pump in the case of liquid working *** pumping performance curves under different liquid media with the variation of Reynolds number,as well as under different eccentricity factors are *** performance and the flow filed characteristics are very sensitive to the tangential momentum accommodation coefficient in the case of gas *** recirculations exist in the flow field,and the sizes of recirculation are different at the different operating points in a performance curve.

关键词： viscous micropump pumping performance flow field characteristics

Anterior proliferative vitreoretinopathy in a patient with Coats disease

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International Journal of Ophthalmology(English edition) 2018年第2期11卷 343-345页

作者： Satoru kase Shohei mori Kousuke Noda Susumu Ishida Department of Ophthalmology Faculty of Medicine and Graduate School of Medicine Hokkaido University

Dear Editor,I am Satoru kase,from the Department of Ophthalmology,Faculty of medicine and Graduate School of medicine,Hokkaido University,Sapporo,Japan.I write to present a case of Coats disease showing anterior proli... 详细信息

关键词： PVR NVG Anterior proliferative vitreoretinopathy in a patient with Coats disease

A clinicopathological study on IgG4-related ophthalmic disease

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International Journal of Ophthalmology(English edition) 2018年第9期11卷 1539-1544页

作者： Yuka Suimon Satoru kase Kan Ishijima Hiromi Kanno-Okada Susumu Ishida Department of Ophthalmology Faculty of Medicine and Graduate School of MedicineHokkaido University Department of Surgical Pathology Hokkaido University Hospital

AIm： To investigate clinicopathological features of immunoglobulin G4-related ophthalmic disease（IgG4-ROD）, and analyze the recurrence rates following systemic corticosteroid ***： We retrospectively searched clinical features, laboratory and histological findings based on the medical records of 21 patients with IgG4-ROD. All the patients examined in this study underwent surgical resection in the ocular adnexal lesions and underwent histological evaluation. This study further investigated clinical and histopathological features of 15 patients who received systemic corticosteroid after the ***： The mean age of the patients consisting of 7 males（33%） and 14 females（67%） was 61y. Fourteen patients were diagnosed as definitive, and 2 and 5 patients were probable and possible IgG4-ROD, respectively. Eyelid swelling was an initial symptom in 11 patients（52%） who did not show systemic involvements at a diagnosis. Fifteen patients received systemic corticosteroid administration, and all showed remission of inflammation. Among them, 10 patients did not recur, whereas 5 patients（33%） recurred during tapering. There were no significant difference between patients with or without recurrence in clinicopathological ***： In this study, female patients are more predominant in IgG4-ROD. While inflammation recurs in one-third of patients, this study do not identify factors associated with recurrence after systemic corticosteroid administration.

关键词： IgG4-related ophthalmic disease corticosteroid histopathology recurrence

A case of conjunctival intraepithelial neoplasia with spheroidal degeneration:a clinicopathological study

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International Journal of Ophthalmology(English edition) 2022年第8期15卷 1401-1403页

作者： Shoichiro Ota Satoru kase Takayuki Tanaka Susumu Ishida Department of Ophthalmology Faculty of Medicine and Graduate School of MedicineHokkaido UniversitySapporo 060-8638Japan

Dear Editor,I am Shoichiro Ota from Hokkaido University hospital,*** intraepithelial neoplasia(CIN)is a disease concept that includes dysplasia and carcinoma in ***,CIN is characterized by tumor cell proliferation located within the epithelium with preservation of the basement membrane[1].In addition to histological diagnosis,anterior segment optical coherence tomography(ASOCT)plays an important role in clinical diagnosis,showing diffuse epithelial thickening with homogeneous high-intensity reflection in case of CIN[2-3].

关键词： diagnosis degeneration neoplasia

A case of nodular posterior scleritis simulating intraocular tumor

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International Journal of Ophthalmology(English edition) 2019年第4期12卷 685-688页

作者： Yukiko Shibata Satoru kase Kenichi Namba Susumu Ishida Department of Ophthalmology Social Medical Corporation Tokeidai Memorial Hospital Department of Ophthalmology Faculty of Medicine and Graduate School of Medicine Hokkaido University

Dear Editor,I am Dr. Yukiko Shibata, from the Department of Ophthalmology, Faculty of medicine and Graduate School of medicine, Hokkaido University. I write to present the case of posterior scleritis simulating intrao... 详细信息

关键词： nodular posterior scleritis intraocular tumor