Search Results - "Ikegaya, N."

Time-resolved particle image velocimetry for cross-ventilation flow of generic block sheltered by urban-like block arrays by Ikegaya, N., Hasegawa, S., Hagishima, A.

“…In this work, time-resolved particle image velocimetry is used for indoor velocity determination of cross-ventilation flow sheltered by urban-like arrays, to…”
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Indoor airflow and thermal comfort in a cross-ventilated building within an urban-like block array using large-eddy simulations by Hirose, C., Ikegaya, N., Hagishima, A., Tanimoto, J.

“…This study characterizes the indoor airflow and occupants’ thermal sensations in a cross-ventilated building model sheltered by generic cube arrays based on…”
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Distributions of gust and peak factors at a pedestrian level in a simplified urban canopy obtained by particle image velocimetry by Hirose, C., Nomichi, T., Ikegaya, N.

“…The complex velocity fields within an urban canopy affect the occurrence of rare weak and strong wind-speed phenomena at the pedestrian level. Although…”
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Numerical simulation for cross-ventilation flow of generic block sheltered by urban-like block array by Adachi, Y., Ikegaya, N., Satonaka, H., Hagishima, A.

“…This study reports the results of large eddy simulations with the standard Smagorinsky model of the velocity fields within a cross-ventilation model sheltered…”
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Consideration of artificial compressibility for explicit computational fluid dynamics simulation by Nagata, K., Ikegaya, N., Tanimoto, J.

“…In this paper, we discuss the theoretical interpretation of the artificial compressibility method (ACM) to propose a new explicit method for the unsteady…”
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Outdoor measurements of relationship between canopy flow and wall pressure distributions of a block within urban-like block array by Hirose, C., Ikegaya, N., Hagishima, A.

“…Research on indoor ventilation is mainly conducted utilizing wind-tunnel experiments and computational fluid dynamics simulations under controlled flow…”
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Evaluation of rare velocity at a pedestrian level due to turbulence in a neutrally stable shear flow over simplified urban arrays by Ikegaya, N., Ikeda, Y., Hagishima, A., Tanimoto, J.

“…The geometric dependency of the wind environment at a pedestrian level is an important issue that influences human comfort and safety in urban outdoor spaces…”
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Effect of the numerical viscosity on reproduction of mean and turbulent flow fields in the case of a 1:1:2 single block model by Ikegaya, N., Okaze, T., Kikumoto, H., Imano, M., Ono, H., Tominaga, Y.

“…Large-eddy simulations were performed for the velocity fields around a 1:1:2 single block model to clarify the effect of the numerical viscosity in different…”
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Outdoor measurement of wall pressure on cubical scale model affected by atmospheric turbulent flow by Hirose, C., Ikegaya, N., Hagishima, A., Tanimoto, J.

“…Most studies on indoor ventilation have utilized wind-tunnel experiments (WTEs) or computational fluid dynamics based approaches under well-controlled flow…”
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Effect of turbulent flow on wall pressure coefficients of block arrays within urban boundary layer by Ikegaya, N., Hirose, C., Hagishima, A., Tanimoto, J.

“…Various numerical simulations have been developed to evaluate the mean ventilation rates of a target building; however, the manner in which turbulent flow…”
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Experimental study on the interaction between turbulent boundary layer and wake behind various types of two-dimensional cylinders by Ikegaya, N., Morishige, S., Matsukura, Y., Onishi, N., Hagishima, A.

“…The interaction between the turbulent boundary layer and wake behind various types of two-dimensional cylinders is examined based on the velocity measurements…”
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Indoor flow datasets of two-layered cross-ventilation models by particle image velocimetry and hot wire anemometry by Wang, W., Ikegaya, N., Hirose, C., Mohamad, M.F.

“…This data article provides temporally and spatially high-resolution datasets of the indoor velocity fields for cross-ventilation models of two-layered…”
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Radiologic and Pathologic Features of the Transmantle Sign in Focal Cortical Dysplasia: The T1 Signal Is Useful for Differentiating Subtypes by Kimura, Yukio, Shioya, A, Saito, Y, Oitani, Y, Shigemoto, Y, Morimoto, E, Suzuki, F, Ikegaya, N, Kimura, Yuiko, Iijima, K, Takayama, Y, Iwasaki, M, Sasaki, M, Sato, N

“…The transmantle sign is a characteristic MR imaging finding often seen in focal cortical dysplasia type IIb. The transmantle sign is typically hyperintense on…”
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A prediction model for wind speed ratios at pedestrian level with simplified urban canopies by Ikegaya, N., Ikeda, Y., Hagishima, A., Razak, A. A., Tanimoto, J.

“…The purpose of this study is to review and improve prediction models for wind speed ratios at pedestrian level with simplified urban canopies. We adopted an…”
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Validity of mid-arm muscular area measured by anthropometry in nonobese patients with increased muscle atrophy and variation of subcutaneous fat thickness by Saito, R, Ohkawa, S, Ichinose, S, Nishikino, M, Ikegaya, N, Kumagai, H

“…Background: The anthropometric measurement of mid-arm muscular area (MAMA) involves overestimation because of various assumptions, this overestimation being…”
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Impact of momentum sources on pedestrian-level peak wind predictions of an urban-like array using large-eddy simulations and statistical models by Sanemitsu, T., Wang, W., Ikegaya, N.

“…•Large-eddy simulations (LESs) for an airflow over a simplified urban-like array were conducted.•Three driving methods were used in LESs with periodic boundary…”
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Predicting low-occurrence wind speed at the pedestrian levels of simplified arrays: Artificial neural network models versus statistical methods by Li, Y., Wang, W., Ikegaya, N.

“…Low-occurrence wind speed in urban areas has a profound impact on the daily activities of people. Although several statistical methods were developed for…”
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Applications of wide-ranging PIV measurements for various turbulent statistics in artificial atmospheric turbulent flow in a wind tunnel by Ikegaya, N., Kikumoto, H., Sasaki, K., Yamada, S., Matsui, M.

“…Particle image velocimetry (PIV) is currently the only method which can experimentally quantify the spatial distributions of velocity with high sampling…”
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Pedestrian-level low-occurrence wind speeds in an urban area predicted by artificial neural networks from fundamental statistics by Li, Y., Seta, K., Ikegaya, N.

“…•Field measurement data analysis reveals non-linear statistical relationships.•Low-occurrence wind speed predictions lay the foundation for urban…”
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Effect of artificial speed of sound in ACM, EDACM, and EMV for two-dimensional cavity flow by Ikegaya, N., Nagata, K., Hirose, C., Tanimoto, J.

“…•Appropriate value of speed of sound was confirmed for four compressible schemes•Four artificial compressible schemes were compared at three Reynolds…”
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