Kyushu University Academic Staff Educational and Research Activities Database
List of Presentations
Aya Hagishima Last modified date:2018.10.09

Professor / Environmental Thermal Engineering / Department of Internationalization and Future Conception / Faculty of Engineering Sciences


Presentations
1. Aya Hagishima, Green infrastructure and urban sustainability, 3rd International Conference on Industrial Mechanical, Electrical, and Chemical Engineering, ICIMECE 2017, 2018.02, Temperature increase in urban areas due to the urban heat island as well as the global climate change inevitably raises the peak load supply for space cooling as well as the risk of heat-related illness in hot climate. This paper provides the comprehensive review of the thermal mitigation effect of urban vegetation based on the field observations..
2. Aya Hagishima, Urban climate phenomena and urban designs
How can we estimate urban effects on climate?, The Architectural Institute of Korea, Busan Ulsan Gyeongnam Chapter, 2015.11.
3. M. F. Mohamad, A. Hagishima, J. Tanimoto, N. Ikegaya, A. R. Omar, On the effect of various design factors on wind-induced natural ventilation of residential buildings in Malaysia, The 2nd Asia conference of International Building Performance Simulation Association, 2014.11.
4. Y. Ikeda, A. Hagishima, N. Ikegaya, J. Tanimoto, Large-Eddy Simulation on the gust probability in urban pedestrian spaces, The 2nd Asia conference of International Building Performance Simulation Association, 2014.11.
5. J. Chung, A. Hagishima, N. Ikegaya, J. Tanimoto, A Wind Tunnel Study on Effect of Scalar Transport between Urban-like Block Array and Air, The 2nd Asia conference of International Building Performance Simulation Association, 2014.11.
6. C. Hirose, A. Hagishima, N. Ikegaya, J. Tanimoto, Large-Eddy Simulation for Turbulent Nature of Flow and Pressure Fields over Urban Building Arrays, The 2nd Asia conference of International Building Performance Simulation Association, 2014.11.
7. N. Ikegaya, Y. Ikeda, A. Hagishima, J. Tanimoto, Geometric Effects on Wind Environment in Simplified Urban Canopies, The 6th International Symposium on Computational Wind Engineering, 2014.06.
8. Ahmad Faiz Mohammad, Sheikh Ahmad Zaki, Mohamed Sukri Mat Ali, Aya Hagishima, Azli Abd Razak, A validation study for CFD simulation of a simplified urban model, 3rd International Conference on Manufacturing Engineering and Process, ICMEP 2014, 2014.01, A proper setting of boundary conditions is a standard upon which simulation results are justified. This study is specifically designed to simulate airflow over a repeating unit of simplified urban models with the application of periodic boundary condition. Similar setting of boundary conditions is used for all models which are of square layout with 25% packing density. The models are constructed with such that the initial velocity field is uniform throughout its internal domain. The results show that different domain heights of 4h and 5h (h as the building height) do not affect the spatial averaging of velocity profiles. In terms of the number of grids per building height, a finer meshing of 32 grids produce more accurate results of velocities and turbulence intensities compared with those of 25 grids when validated against the previous direct numerical simulation (DNS) data. Nevertheless, these criteria depend upon longer averaging period for better estimation of flow statistics. The boundary condition setting used in this preliminary study is nevertheless capable of producing current results comparable to past data although future works should focus on optimizing the important criteria in a simulation such as domain height, grid numbers, and averaging time..
9. Aya Hagishima, Jun Tanimoto, Stochastic characteristics of thermal load in a single dwelling in a residential building based on building energy simulation coupled with a sub-model, 13th Int. IBPSA Conf. Building Simulation 2013, 2013.08.
10. Mohamad Mohd Faizal, Aya Hagishima, Jun Tanimoto, Naoki Ikegaya, Omar Abdul Rahman, Wind-induced natural ventilation in typical single story terraced houses in Malaysia, 13th Int. IBPSA Conf. Building Simulation 2013, 2013.08.
11. Azli Abd Razak, Aya Hagishima, Naoki Ikegaya, Mohd Faizal Mohamad, Sheikh Ahmad Zaki, Mean wind flow field around idealized block arrays with various aspect ratios, International Conference on Advances in Mechanical Engineering 2013, ICAME 2013, 2013, This study investigates the characteristic of spatially averaged mean velocity profile and the flow pattern within urban canopy layer especially in pedestrian level using CFD technique. Large eddies simulation (LES) was used to perform a series of simulation of the flow around block arrays with staggered arrangement under various conditions of aspect ratio, αp (roof-to-frontal area ratio) from 0.33 to 3.0. The spatially-average profiles of both mean wind speed and streamwise velocity over various block arrays were compared with each other. The analysis clarified the following two facts. 1) The vertical mean flow structure inside the canyon change due to change a plan area ratio and block aspect ratio. 2) The horizontal mean flow structure around the block change if pedestrian level change form z = 0.05h to z = 0.25h. This can be translated to the effect of high-rise building to the flow around the building..
12. Aya Hagishima, Jun Tanimoto, Naoki Ikegaya, Seijiro Mitsuyasu, Stochastic characteristics of thermal load in a single dwelling in a residential building based on building energy simulation coupled with a sub-model for considering variation in behavior schedules of residents, 13th Conference of the International Building Performance Simulation Association, BS 2013, 2013, The stochastic characteristics of the heating/cooling load of a dwelling in a residential building were investigated using time-series data estimated by Total Utility Demand Prediction System TUD-PS which can predict utility demand such as air-conditioning loads considering the time-varying behavior schedule of residents. The simulation results for 16 cases of different conditions of family type and dwelling indicates the universality of the probability density functions of heating/cooling load..
13. Mohamad Mohd Faizal, Aya Hagishima, Tanimoto Jur, Naoki Ikegaya, Omar Abdul Raliman, Wind-induced natural ventilation in typical single storey terraced houses in Malaysia, 13th Conference of the International Building Performance Simulation Association, BS 2013, 2013, Natural ventilation in buildings is a well known strategy for energy saving to ensure occupant" s thermal comfort without any energy consumption and influence on global warming. In the present study, airflow inside and around two types of terraced house model, one with a porch and another without a porch, have been numerically simulated using Reynolds-averaged Navier-Stokes model to evaluate the effect of a porch on wind-induced ventilation. The results of velocity distribution inside rooms and ventilation rates of openings revealed that the porch has a significant effect on the flow field modification, resulting in the better ventilation rate of the building..
14. Nik Ibrahim Nik Mohd Izual, Naoki Ikegaya, Aya Hagishima, Jun Tanimoto, A study on the similarity between scalar and momentum roughness lengths based on the scalar concentration measurement, Proc. 1st Asia Conf. of Int. Building Performance Simulation Association (ASim 2012), Shanghai, China, 2012.11.
15. Azli Abd Razak, Naoki Ikegaya, Aya Hagishima, Jun Tanimoto, Numerical investigation of urban geometry impact on pedestrian wind environment, Proc. 7th Int. Colloquium of Bluff Body Aerodynamic and Application, 2012.09.
16. Aya Hagishima, Naoki Ikegaya, Jun Tanimoto, Manato Yamaguchi, Drag Coefficients of staggered arrays with various block, Proc. 8th Int. Conf. on Urban Climate (ICUC-8), 2012.08.
17. Naoki Ikegaya, Aya Hagishima, Jun Tanimoto, Wind-tunnel experiments on scalar boundary layer over cubical block arrays, Proc. 8th Int. Conf. on Urban Climate (ICUC-8), 2012.08.
18. Sheikh Ahmad Zaki, Aya Hagishima, and Jun Tanimoto, Estimation of wind-induced ventilation in urban building of regular arrays with various layouts, 5th International Building Physics Conference, 2012.05.
19. Azli Abd Razak, Aya Hagishima, and Jun Tanimoto, Large-Eddy Simulation on airflow over a building Array for assessment of well ventilated city, 5th International Building Physics Conference, 2012.05.
20. Sheikh Ahmad Zaki, Aya Hagishima, Jun Tanimoto, Spatial distribution of pressure drag acting on rectangular block arrays with various layouts, 12th Conference of International Building Performance Simulation Association Building Simulation 2011, BS 2011, 2011, This study reported a series of wind tunnel experiments on the spatial distribution of the pressure drag acting on the walls of rectangular block arrays, which were arranged in staggered, square, and diamond layouts under the conditions of different packing densities. The obtained bulk pressure coefficients of a block located in various staggered arrays showed clear dependency of packing density. This result suggests the importance of the consideration for the reduction of wind-driven cross ventilation due to neighborhood densely built-up area in building simulation coupled with ventilation model..
21. Jun Tanimoto, Aya Hagishima, Takeshi Iwai, Naoki Ikegaya, Total utility demand prediction for multi-dwelling sites considering variation of occupant behavior schedules, 12th Conference of International Building Performance Simulation Association Building Simulation 2011, BS 2011, 2011, Based on the authors' previous works, this paper describes a new methodology that uses a bottom-up approach for accurately calculating the time series utility loads (e.g., energy, power, city water, hot water, etc.) for multi-dwelling systems, including residential buildings, residential block areas, and even the entire city. This calculation considers the behavioral variations of the inhabitants of the dwellings. The proposed method constitutes a procedure for calculating cooling/ heating loads based on a series of Monte Carlo simulations where the HVAC on/off state and the indoor heat generation schedules are varied at a time interval. A data set of time-varying inhabitant behavior schedules with a 15-minute time resolution was integrated into the model. The established model, which is called the Total Utility Demand Prediction System (TUD-PS), was integrated to estimate a multi-dwelling system, where we can accurately predict various peak demands and seasonal or annual demands. By applying this method to a typical residential building, we highlighted several advantages of TUD-PS..
22. Aya Hagishima, Naoki Ikegaya, Yudai Tanaka, Jun Tanimoto, Ken-ichi Narita, Experimental study of geometry dependence of scalar transfer efficiency of rough surfaces, Fifth International Symposium on Computational Wind Engineering (CWE2010), 2010.05.
23. Naoki Ikegaya, Aya Hagishima, Jun Tanimoto, Large-eddy simulation of scalar transport phenomena between an urban surface and atmosphere, Fifth International Symposium on Computational Wind Engineering (CWE2010), 2010.05.
24. Sheikh Ahmad Zaki, Aya Hagishima, Jun Tanimoto, Naoki Ikegaya, Wind tunnel measurement of aerodynamic parameters of urban building arrays with random geometries, Fifth International Symposium on Computational Wind Engineering (CWE2010), 2010.05.
25. Manato Yamaguchi, Jun Tanimoto, Aya Hagishima, Yoshiki Kikuchi, Sheikh Ahmad Zaki, Akashi Mochida, A wind tunnel study on drag coefficient for complex arrays of various types of roughness elements, The International Association for Urban Climate (IAUC), 2009.06.
26. Aya Hagishima, Ken-ichi Narita, Jun Tanimoto, and Tomohito Kimura, Multi point measurement on the turbulent characteristics within urban-like canopy using numerous fine wire thermocouples
THERMOCOUPLES, The International Association for Urban Climate (IAUC), 2009.06.
27. Sheikh Ahmad Zaki, Yoskiki Kikuchi, Manato Yamaguchi, Aya Hagishima, Jun Tanimoto, Aerodynamic parameters of urban building arrays with random geometry, The International Association for Urban Climate (IAUC), 2009.06.
28. Yuudai Tanaka, Aya Hagishima, Jun Tanimoto, Ken-ichi Narita, Naoki Ikegaya, Investigation on transfer coefficient for various geometric types of urban-like roughness based on the salinity method, The International Association for Urban Climate (IAUC), 2009.06.
29. Naoko Konno, Yuichi Tabata, Aya Kikuchi, Akashi Mochida, Takashi Maruyama, Aya Hagishima, Jun Tanimoto, Yoshiki Kikuchi, CFD prediction of turbulent flow under the influence of moving automobiles in street canyons, The International Association for Urban Climate (IAUC), 2009.06.
30. Jun Tanimoto, Aya Hagishima, Total utility demand prediction based on probabilistically generated behaviroal schedules of actural inhabitants, 11th International IBPSA Conference - Building Simulation 2009, BS 2009, 2009, This paper describes a new methodology in calculating accurately the time series utility loads (energy, power, city water, hot water, etc.) in a dwelling. This calculation takes into account the behavioral variations of the dwelling inhabitants. The proposed method contains a procedure for cooling load calculations based on a series of Monte Carlo simulations where the HVAC on/off state and the indoor heat generation schedules are varied, time-step by time-step. A data set of time-varying inhabitant behavior schedules, with a 15 minute resolution, generated by the authors in previous studies and validated by a comparison analysis to several field measurement data sets, was integrated into the model. The established model, which is called the Total Utility Demand Prediction System (TUD-PS) can be applied to, for example, accurate estimation of an integrated space maximum requirement, such as the total load of a building or an urban area. In a series of numerical experiments, huge discrepancies were found between the conventional results and those considering the time-varying inhabitant behavior schedules. In particular, deriving the dynamic state change, of having the HVAC on/off from the inhabitant's schedules, was found to be a significant factor in the maximum cooling and heating loads..
31. Ikeagaya, N., Hagishima, A., Tanimoto, J,, A wind tunnel experiment on scalar transfer coefficients of complex urban array, 5th Japanese-German Meeting on Urban Climatology, Freiburg, Germany, 2008.10.
32. Hagishima, A., Tanimoto, J,, Drag force coefficient and roughness parameters for urban-like roughness with non-uniform heights, 5th Japanese-German Meeting on Urban Climatology, Freiburg, Germany, 2008.10.
33. Aya Hagishima, Jun Tanimoto, Wind tunnel experiment on drag force coefficient of urban-like roughness with height variation, 4th International Conference on Advances in Wind and Structures, 2008.06.
34. A. Hagishima, Requirements for an interdisciplinary bridge between building and urban scale physics, Building Simulation 2007, 2007.09.
35. Yuemei Zhu, Jing Liu, Yang Yao, Zuiliang Ma, Aya Hagishima, Jun Tanimoto, Evaluating the impact of solar radiation on outdoor thermal comfort by the development and validation of a simple Urban climatic model, 2006 International Solar Energy Conference, ISEC2006, 2007, In this paper, in order to predict the outdoor thermal environment, a simple multi-layer canopy model coupled with calculation of outdoor thermal comfort was developed. SET* value was used to estimate the pedestrian level of thermal comfort in the outdoor thermal environment. Preliminary verification of this model using observational data on the outdoor thermal conditions showed good results. In addition, the results show that outdoor thermal comfort is significantly different with air temperature. Except for air temperature, both solar radiation and humidity play important roles on outdoor thermal comfort..
36. Jun Tanimoto, Aya Hagishima, Hiroki Sagara, Validation of the probabilistic methodology to generate actual inhabitants' behavior schedules for accurate prediction of maximum energy requirement, Building Simulation 2007, BS 2007, 2007, A data set of myriad and time-varying inhabitant-behavior schedules with a 15-minute time resolution, generated by the authors in a previous study, is validated through a comparison analysis. We show three comparisons. The first and second compare the estimated demand with a time series of actual utility demand. The comparisons indicate that the generated data and its algorithm, described by the authors, have an appropriate robustness. Another comparison between the estimate and the annual averaged daily water demand of a residential area, consisting of 9,327 residences, also shows an acceptable consistency..
37. Hagishima,A.;Narita.K.;Sugawara.H.;Tanimoto.J, Field measurement on convective heat transfer coefficient of full-scale 2D canopy, International Conference on Urban Climate, 2006.05.
38. Yuemei Zhu, Jing Liu, Yang Yao, Zuiliang Ma, Aya Hagishima, Jun Tanimoto, Evaluating the impact of solar radiation on outdoor thermal comfort by the development and validation of a simple urban climatic model, Solar 2006: Renewable Energy - Key to Climate Recovery, Including 35th ASES Annual Conference, 31st ASES National Passive Solar Conference, 1st ASES Policy and Marketing Conference and ASME Solar Energy Division International Solar Energy Conference, 2006, In this paper, in order to predict the outdoor thermal environment, a simple multilayer canopy model coupled with calculation of outdoor thermal comfort was developed. SET* value was used to estimate the pedestrian level of thermal comfort in the outdoor thermal environment. Preliminary veri cation of this model using observational data on the outdoor thermal conditions showed good results. In addition, the results show that outdoor thermal comfort is significantly different with air temperature. Except for air temperature, both solar radiation and humidity play important roles on outdoor thermal comfort..
39. Yuemei Zhu, Jing Liu, Yang Yao, Zuiliang Ma, Aya Hagishima, Jun Tanimoto, Evaluating the impact of solar radiation on outdoor thermal comfort by the development and validation of a simple urban climatic model, ASME International Solar Energy Conference - Solar Engineering 2006, 2006, In this paper, in order to predict the outdoor thermal environment, a simple multi-layer canopy model coupled with calculation of outdoor thermal comfort was developed. SET* value was used to estimate the pedestrian level of thermal comfort in the outdoor thermal environment. Preliminary verification of this model using observational data on the outdoor thermal conditions showed good results. In addition, the results show that outdoor thermal comfort is significantly different with air temperature. Except for air temperature, both solar radiation and humidity play important roles on outdoor thermal comfort..
40. M. Kanda, T. Kawai, M. Kanega, R. Moriwaki, Aya Hagishima, K. Narita, Simple urban energy balance model for meso-scale simulation (SUMM), 86th AMS Annual Meeting, 2006.
41. Jun Tanimoto, Aya Hagishima, Hiroki Sagara, Cooling looad simulation considering actual variation of inhabitants' behavior inhabitants' behavior for accurate estimation of urban maximum energy requirement, Building Simulation 2005 - 9th International IBPSA Conference, BS 2005, 2005, A brand-new methodology for considerably accurate time-series cooling load calculation in a dwelling is established, motivated by the fact that dwelling energy requirements so significantly affect the so-called urban heat island. Calculation that takes variation among dwelling-inhabitants' behaviors into consideration appears to be important. The proposed method contains two crucial features. The first is a procedure for cooling load calculation based on a series of Monte Carlo simulations where HVAC on/ off state and indoor heat generation schedule are variable time-step by time-step. The second feature is an algorithm to generate myriad schedule data of each inhabitant's behavior that must be provided with fine time resolution..
42. Aya Hagishima, Jun Tanimoto and Ken-ichi Narita, Comparisons of various experimental results on the convective heat transfer coefficient of urban surfaces, 5th Urban Environment of AMS,, 2004.08.
43. Aya Hagishima, Ken-ichi Narita and Jun Tanimoto,, Field experiment on the oasis effect of urban areas using potted plants ,2004.8, 5TH Urban Environment of AMS,, 2004.08.
44. Aya Hagishima, Jun Tanimoto, Ken Ichi Narita, Comparisons of various experimental results on the convective heat transfer coefficient of urban surfaces, 5th Symposium on the Urban Environment, 2004, A comparative study on experimental results obtained on the convective heat transfer coefficients on urban surfaces are discussed. Convective heat transfer coefficient (CHTC) was considered to express the turbulent heat exchange between the atmosphere and urban surfaces. A detailed study on relationship between CHTC of vertical wall of buildings and wind speeds, and CHTC for horizontal building roofs and wind speeds, was also presented. It was observed that position of walls has relatively large influence on CHTC..
45. Aya Hagishima, Ken Ichi Narita, Jun Tanimoto, Field experiment on the oasis effect of urban areas using potted plants, 5th Symposium on the Urban Environment, 2004, An experimental study, using potted plants was, conducted to estimate the oasis effects of urban areas. The study for 28 days shows that evaporation rate of an isolated plant is one-and-half times larger than that of plant placed in the center of a dense canopy. The experiment was accompanied by noting the evaporation rate of 55 potted plants, arranged at an interval of 3.6 meters. It was observed that evaporation rate increased with an decrease in the vegetation density..
46. Hagishima. A.; Tanimoto. J.,, Sensitivity Analysis of Factors of Urban Heat Islands of Various Meteorological Regions using the Urban Canopy Model 2003.9, ICUC-5 (5th International Conference of Urban Climatology in Lodz), 2003.09.
47. Hagishima. A.; Tanimoto. J.; Katayama. T.,, An Intrigued Analysis to Quantify the Causes for Urban Heat Island by the Revised ARCHITECTURE - URBAN -SOIL - SIMULTANEOUS SIMULATION MODEL, AUSSSM Part.1 Theoretical Background and Model Frame Showing with a Resutt of Standard Solution, AMS Forth symposium on the urbanenvironment, 2002.05.