In our present research, we focus on the modeling of airflow related to natural disasters, such assand accumulation, with urban form studies. The objective is to find which urban form can promote sand passing andreduce as much as possible stagnation of sand in the building area (streets, alleys, etc.). The urban form design will bediscussed through the simulation of airflow by using Computation...

This paper presents an aerodynamic analysis of intonation on reading speech in Hong Kong Cantonese. In this study, the variation in oral airflow rate, fundamental frequency (F0), as well as intensity level of the acoustic signal is studied. The goals of this study are to evaluate the correlations among fundamental frequency of vibration of the vocal folds, rate of oral airflow and intensity lev...

In an effort to develop more effective aerosol therapy procedures, we examined airflow patterns in the lung of a child (age four years). In particular, wc were concerned with how ventilatory parameters (i.e., breathing rate and tidal volume) affected the patterns of airflow around tumors. To conduct the study, a computational fluid dynamics package, FIDAP, was used to define a model lung. The r...

A numerical study on Nox emission from an industrial furnace utilizing high temperature air combustion (HTAC) technology was done. The basic concept of the regenerative burner including heating a diluting of fresh air by flue gas was implemented in a two-dimensional furnace model. Governing equations in conjunction with a turbulence model and an overall chemistry model were solved using an impl...

Whilst R290 is currently used to a limited extent in room air conditioners there desire for wider application due its excellent performance and negligible global warming potential. The product standard IEC 60335–2–40 specifies requirements limit the allowable refrigerant charge such way that it obstructs use of R290. Airflow an indoor unit can be dilute leak, enabling substantially greater quan...

A pneumatic oscillating Chinese wolfberry harvester was designed to improve the efficiency of manual harvesting and minimize fruit damage by mechanical harvesting. The shedding model under forces established based on kinetic analysis, flow field characteristics were investigated using computational fluid dynamics (CFD). position shape fan outlet determined comparing effects a linear reduction L...

BACKGROUND Recent studies have shown a higher rate of surgical site infections in hip prosthesis implantation using unidirectional airflow ventilation compared with turbulent ventilation. However, these studies did not measure the air microbial quality of operating theatres (OTs), and assumed it to be compliant with the recommended standards for this ventilation technique. AIM To evaluate air...

BACKGROUND AND OBJECTIVES Cardiovascular disease (CVD) and chronic obstructive pulmonary disease (COPD) commonly coexist and share common risk factors. The prevalence of COPD in outpatients with a smoking history and CVD in Japan is unknown. The aim of this study was to determine the proportion of Japanese patients with a smoking history being treated for CVD who have concurrent airflow limitat...

Objectives (1) Analyze the relationship between intranasal airflow distribution and subjective nasal patency in healthy and nasal airway obstruction (NAO) cohorts using computational fluid dynamics (CFD). (2) Determine whether intranasal airflow distribution is an important objective measure of airflow sensation that should be considered in future NAO virtual surgery planning. Study Design Cros...