Tag Archives: Modeling

Does the leaf structure prevent the deposition of airborne particles? 葉の構造は大気中微粒子の付着を防止するのか?

Other “intro” of papers from our lab >> /tag/paper/


Our results suggest that epicuticular wax crystals affect distribution of particles on needles. Densely distributed epicuticular wax crystals might prevent the deposition of sub-micron particles on the surfaces of needles to retain the function of stomata.

電界放出型走査電子顕微鏡(FE-SEM)によるスギ(代表的な針葉樹種)の葉表面に人工的に散布されたサブミクロンサイズの炭素系粒子の局在を調べました。気孔の機能を保持するために、密に分布されたエピクチクラワックス結晶は、気中からの微粒子の付着を防止する役割があるかもしれません。 Continue reading Does the leaf structure prevent the deposition of airborne particles? 葉の構造は大気中微粒子の付着を防止するのか?

Kusdianto, Doctoral presentation, 19 Aug. 2014, 博士論文公聴会

19 Aug. 2014. BASE 1st floor meeting room

DOCTORAL THESIS: The role of chemical and physical properties of substrate in the deposition of particles
粒子の沈着における基板表面の物理的・化学的特性の役割
by KUSDIANTO (Also a faculty member of Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, ITS)

Go to hydropilic surface

*** PUBLICATIONS ***

Our results in a popular book (about PM2.5)

intro-in-book-HatakeyamaOur result were introduced in a book on PM2.5 (Author: Shiro Hatakeyama (TUAT) 2014)
越境する大気汚染: 中国のPM2.5ショック
著者: 畠山史郎
ISBN: 978-4-569-81740-8 (842 Yen)
ISBN978-4-569-81740-8

==>> Book/Chapters by Wuled Lenggoro

Invited presentation. COMSOL (a simulation software) conference. 熱流体シミュレーション(招待)発表

pramujo-comsol2013
We were invited for a poster talk at 2013 COMSOL Conference 2013 (Tokyo, 7 Dec.)

熱処理シミュレーションによる酸化物粉末のドーピング効率の向上
Optimization of Post-Heat Treatment for Doping of Metal Oxide Particles

by P. Widiatmoko, Y. Kondo, H. Matsushima, W. Lenggoro

Liquid-to-solid route for preparing a doped metal oxide (powder) shows advantage on the homogeneity of the precursor as well as the product. Heat treatment plays important role in the process where the salt of precursor in the liquid reacts to form metal oxide solid particles and doped with ions of another element. Understanding the effect of heat treatment in the doping process will then give great advantages. In the present study, different heat-treatment profiles had been proposed and applied to increase the efficiency of doping.

2013 Kanji Takahashi Award for our paper, 高橋幹二賞

2013 Kanji Takahashi Award

2013 Kanji Takahashi Award (from Japan Association of Aerosol Science and Technology) for our paper published in 2011:
Measurement of Model Aerosols Containing Two Metal Components Formed via Cooling and Dilution Routes, Authors: Naoya HAMA, Yukie TAKASHIMA, Masao GEN, Mayumi TSUKADA, Hidehiro KAMIYA and Wuled LENGGORO*
Journal of Aerosol Research, エアロゾル研究, 26, 277-285 (2011)

For full article/PDF = jstage, Or from: researchgate.net

In 2010-2011, Hama (濱) was doctoral student; Takashima (高島) was master student; Gen(玄)was master student (in 2011 became doctoral student); Dr. Tsukada and Prof. Kamiya are our “strong” collaborators.

火力発電所等の燃焼過程における粒子生成を実験室内で模擬した。モデル混合排気ガスには軽金属(アルカリ)と重金属系の粉末の昇華を用いて、その後の希釈(冷却)と凝縮による粒子化の挙動を計測した研究。火力発電所や室内等の「燃焼の場」における捕集技術の高度化に役に立つ。

Thermal Fluid Analysis by Numerical simulation

The emission of alkali (“light-metals”) and heavy metals in combustion processes is an important contributor to environmental load. We investigated experimentally in the laboratory the generation of particles from model exhaust gases derived from NaCl and CdCl2. An on-line gas-phase measurement system showed that the mean diameters of aerosol particles derived from the evaporation of NaCl and CdCl2 were 35 and 30 nm, respectively, when the dilution ratio of the model gas was 1:20. The value was 50 nm in two-metal co-evaporation (NaCl and CdCl2). These results may be informative for predicting the phenomena related to gas-to-particle conversion at the exit of stationary emission sources.

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Our recent topics << 最近の発表論文概要.
Research areas << 研究領域

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Iinoya Award to a student (30th. Symposium on Aerosol). 院生が学会賞受賞

Iinoya Award 2013 for Masao Gen
Doctoral student: MASAO GEN got the 2013 IINOYA AWARD
during 30th SYMPOSIUM ON AEROSOL SCIENCE & TECHNOLOGY (held in Kyoto Univ.)
(Supplementary prize = cash prize of 100,000 Yen)

gen-got-award-kyoto-univ2013

“Development of a portable sensor system based on aerosol particles to detect pesticide residues”

エアロゾル粒子センサーを用いた携帯型残留農薬検出システムの開発

(東京農工大学・大学院博士後期課程)玄 大雄

The award selection was based from a “special session” (5 min. presentation and more than 10 min. Q/A). This session is the only session running; few hundred attendees were the judges. Not only graduate students, but senior researchers also join this session. 【井伊谷賞】ほとんどのシンポジウム参加者が審査員..特別セッションでの優れた発表を対象.エアロゾルに関する萌芽的な研究,問題点の指摘,新しい分野の開拓,未来志向の夢のある話題など,学会の発展・活性化に寄与するものについて,遊びとゆとりの気持ちを持って発表.(エアロゾルとは、気相中に浮遊する固体または液体)

これまでの受賞者: A list of winner of Iinoya Award.

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Our other presentations at
THE 30th SYMPOSIUM ON AEROSOL SCIENCE AND TECHNOLOGY
August 27−29, 2013, Kyoto Univ.
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第30回エアロゾル科学・技術研究討論会
2013年 8月27日(火)- 29日(木)
京都大学百周年時計台記念館(京都市左京区吉田本町)
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Evaluation of generation behavior of condensable suspended particulate matter from stationary sources by using model flue gas
E04* 固定発生源からの凝縮性SPM生成挙動のモデル燃焼排ガスを用いた考察
(東京農工大学)前田洋輔・江島達弥・ 塚田まゆみ・Wuled Lenggoro・神谷秀博 (電力中央研究所)野田直希・牧野尚夫
(With TUAT Kamiya Lab, and Central Research Institute of Electric Power Industry)

made-by-ikawa-sprayer2013

Development and evaluation of a coarse particle generator using piezoelectric device
SE09* 圧電素子を利用した粗大粒子発生器の開発と評価
(柴田科学㈱, 東京農工大学)井川誠司
(東京農工大学)玄 大雄・Wuled Lenggoro
(With Sibata Scientific Technology, Ltd)

Measurement of the surface potential of PM2.5 in ambient air
YP05* 環境大気中PM2.5の表面電位の測定
(慶應義塾大学)郡司裕真・吉田哲郎・奥田知明
(東京農工大学)K. Kusdianto・玄 大雄・ 佐藤誠一・Wuled Lenggoro
[Poster: Main researchers are Okuda group, Keio Univ.]

(An invited talk in 9th Aerosol Young Researcher Meeting)
“Networked Aerosol Researches”

第9回エアロゾル学会若手討論会 【招待講演】Wuled Lenggoro

Lenggoro at JAAST Symposium Kyoto
– This is photo is provided by Young Associations in JAAST

Invited to COMSOL Conference Tokyo 2012 (22 Nov.)

22 November 2012
COMSOL CONFERENCE TOKYO 2012

www.kesco.co.jp/conference/2012

Presenter: Masao Gen
冷却後の希釈器内における混合ガス由来のモデルエアロゾルの計測
Measurement of model aerosols derived from gas mixtures after cooling in a diluter

燃焼由来の重金属を含む粒子状物質は環境負荷の原因の一つとして懸念されている。発生ガスから粒子化は冷却ならびに希釈を経て起こるとされているが、未だに詳細なメカニズムは明らかになっていない。そこで本研究ではモデルガスから生成した粒子のオンライン計測を行った。また、ガスから粒子化へのプロセスの把握のため、流体と伝熱のシミュレーションを行い、実験結果との比較を行った。
The emission of particles involving heavy metals in combustion process is a contributor to environmental concerns. However there is little study on the mechanism by which gas-to-particle conversion occurs during cooling and dilution processes under the atmosphere. In the present study, particles generated from model exhaust gasses were investigated. The condition of gas-to-particle conversion was predicted using a computational fluid dynamics combined with heat transfer.

www.kesco.co.jp/conference/2012/session_poster.html