CFD based study of thermal sensation of occupants using thermophysiological model. Part II

Angelova, Radostina A.; Pichurov, George; Stankov, Peter; Rodrigo, Iosu

doi:10.1108/ijcst-10-2013-0116

Cited by 6 publications

(6 citation statements)

References 16 publications

(12 reference statements)

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“…In a study of heat transfer and physiological responses of unclothed human body in hot environment, Yang et al, [23] designed a simulation model of a simple 3D climate chamber with length, width and height of 5 m, 3 m, and 2.7 m, respectively. Another study simply used a 2D room 4m x 3m to investigate thermal sensation of occupants using a thermophysiological model [24]. The air conditioner was included in the model with the air supply entrance on the top-left and the exit on the bottom-right.…”

Section: Environment Modelmentioning

confidence: 99%

“…They found out that the operative temperature obtained from the CFD can be used, instead of the globe temperature, without loss of precision. Angelova et al, [24] took into account the skin temperature as an evaluation for heat stress for the study of the influence of clothing and activity on the occupants based on CFD simulation.…”

Section: Heat Stress Indexmentioning

confidence: 99%

“…Angelova et al, [24] placed a standing human body manikin in the middle of a 2D simulation room. The shape of the manikin was a simplified version of a previous study by Pichurov [31].…”

Section: Manikin Modelmentioning

confidence: 99%

“…2D representation of 3D Manikin proposed by Kamsah et al,[22] 2D representation of 2D Manikin proposed by Angelova et al,[24] …”

mentioning

confidence: 99%

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Application of Computational Fluid Dynamic Simulation for the Study of Heat Stress and Heat Strain - A Review

Ismail

Jusoh

Zein

et al. 2020

ARFMTS

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The study on heat stress and heat strain has been conducted since early 20th century. However, in the current years, it attracts an increase of attention around the world mainly due to the global climate change issues. Traditionally, there are two main approaches in the study of heat stress and heat strain which are the climatic chamber studies and the field studies. But, with the recent development in the computational fluid dynamic (CFD) simulation, the researchers shift toward this approach as a new method for the study of heat stress and heat strain. Climatic chamber can be simulated with various environmental parameters such as air flow and heat transfer while a manikin is used to identify the effects of these parameters. In this study, recent developments of the CFD simulation for the study of heat stress and heat strain for indoor environment are reviewed while their methodology and results are compared. The discussions that will be presented in this work will focus on the various CFD techniques and its significance as a new method for the study of heat stress and heat strain.

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Section: Environment Modelmentioning

confidence: 99%

Section: Heat Stress Indexmentioning

confidence: 99%

“…Angelova et al, [24] placed a standing human body manikin in the middle of a 2D simulation room. The shape of the manikin was a simplified version of a previous study by Pichurov [31].…”

Section: Manikin Modelmentioning

confidence: 99%

“…2D representation of 3D Manikin proposed by Kamsah et al,[22] 2D representation of 2D Manikin proposed by Angelova et al,[24] …”

mentioning

confidence: 99%

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Application of Computational Fluid Dynamic Simulation for the Study of Heat Stress and Heat Strain - A Review

Ismail

Jusoh

Zein

et al. 2020

ARFMTS

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“…Numerical simulation of realistic environments and the human body offers yet another opportunity for coupling a virtual human body built in the CFD environment with mathematical models of human thermoregulation, thermal sensation, and comfort (Cropper et al, 2010;Angelova et al, 2014;Lim et al, 2015;Voelker and Alsaad, 2018). In this way, the physiological and sensational human response to the designed environment can be simulated with high resolution and accuracy, given that the human response models are properly validated [12,13].…”

Section: Introductionmentioning

confidence: 99%

Influence of human body geometry, posture and the surrounding environment on body heat loss based on a validated numerical model

Psikuta

et al. 2019

Building and Environment

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For accurate prediction of human thermal comfort in indoor space, a fully validated human body-environment interface model is the key factor. In this study, a numerical model for heat transfer simulation between the human body and the environment was developed. Three parameters, including air speed, air temperature, and total heat transfer coefficient at the body surface, were validated against experiments including a manikin placed in a climatic chamber. Based on the verified model, a set of human body-environment parameters were investigated to quantify their relevance for thermal simulations. The parameters included three body geometries with different simplification levels, three body postures, and three kinds of environments differing in room configuration, size, and wall emissivity. The investigations revealed that body geometry simplification had only a moderate influence on overall heat transfer between the body and environment, while greatly influencing local heat transfer. Body posture showed a more prominent impact on heat transfer than the geometry, especially on the radiative heat transfer, due to the view factor change caused by local body orientation.The room configuration largely influenced the airflow pattern and, thus, convective heat transfer, while room size and wall emissivity only had an influence on radiative heat transfer. A similar environmental setup and body posture with the real situation would be suggested as the premise for the bodyenvironment modelling work. The validated numerical model, along with the set of body-environment parameters, can be used for a large range of investigations on human physiological response in varying thermal environments.

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Numerical investigation of droplets in a cross-ventilated space with sitting passengers under asymptomatic virus transmission conditions

Peña-Monferrer¹,

Antao²,

Sawko³

2021

Physics of Fluids

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Asymptomatic virus transmission in public transportation is a complex process that is difficult to analyze computationally and experimentally. We present a high-resolution computational study for investigating droplet dynamics under a speech-like exhalation mode. A large eddy simulation coupled with Lagrangian tracking of drops was used to model a rectangular space with sitting thermal bodies and cross-ventilated with a multislot diffuser. Release of drops from different seat positions was evaluated to analyze the decontamination performance of the ventilation system. The results showed an overall good performance, with an average of 24.1% of droplets removed through the exhaust in the first 40 s. The droplets' distribution revealed that higher concentrations were less prevalent along the center of the domain where the passengers sit. Longitudinal contamination between rows was noted, which is a negative aspect for containing the risk of infection in a given row but has the benefit of diluting the concentration of infectious droplets. Droplets from the window seat raised more vertically and invaded the space of other passengers to a lesser extent. In contrast, droplets released from the middle seat contaminated more the aisle passenger's space, indicating that downward flow from personal ventilation could move down droplets to its breathing region. Droplets released from the aisle were dragged down by the ventilation system immediately. The distance of drops to the mouth of the passengers showed that the majority passed at a relatively safe distance. However, a few of them passed at a close distance of the order of magnitude of 1 cm.

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CFD based study of thermal sensation of occupants using thermophysiological model. Part II

Cited by 6 publications

References 16 publications

Application of Computational Fluid Dynamic Simulation for the Study of Heat Stress and Heat Strain - A Review

Application of Computational Fluid Dynamic Simulation for the Study of Heat Stress and Heat Strain - A Review

Influence of human body geometry, posture and the surrounding environment on body heat loss based on a validated numerical model

Numerical investigation of droplets in a cross-ventilated space with sitting passengers under asymptomatic virus transmission conditions

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