Brandveiligheidsanalyse van semi-open parkeergarages

De ontwerprichtlijn NEN2443 schrijft met betrekking tot het brandveilig ontwerpen van semi-open parkeergarages ofwel (1) een minimale hoeveelheid open geveloppervlak voor, of (2) een minimale ventilatievoud. Dit heeft als doel om in geval van brand de ontwikkelde rook en warmte op een effectieve manier af te voeren uit de parkeergarage. In deze studie zijn zeven verschillende varianten beoordeeld op hun brandveiligheid door middel van gevalideerde Computational Fluid Dynamics (CFD) simulaties. Deze varianten voldoen alle aan de NEN2443. Geconcludeerd wordt dat drie van de zeven varianten een onvoldoende hoog brandveiligheidsniveau hadden

Fire safety assessment in semi-open car parks

Guidelines for the safe design of semi-open car parks require a minimum amount of open façade in order to ensure an effective removal of heat and smoke during a car fire. In this study the fire safety level is assessed by the use of validated Computational Fluid Dynamics (CFD) simulations of different design variants. The fire safety is assessed using temperature and sight length criteria for safe deployment of the fire department. Results show that 3 out of 7 studied variants did not meet these criteria. It is therefore concluded that it is possible to design semi-open car parks which comply with current Dutch guidelines, yet when assessed with criteria for safe deployment of the fire brigade have an insufficient fire safety level

Fire safety assessment in semi-open car parks

Guidelines for the safe design of semi-open car parks require a minimum amount of open façade in order to ensure an effective removal of heat and smoke during a car fire. In this study the fire safety level is assessed by the use of validated Computational Fluid Dynamics (CFD) simulations of different design variants. The fire safety is assessed using temperature and sight length criteria for safe deployment of the fire department. Results show that 3 out of 7 studied variants did not meet these criteria. It is therefore concluded that it is possible to design semi-open car parks which comply with current Dutch guidelines, yet when assessed with criteria for safe deployment of the fire brigade have an insufficient fire safety level

Risk profiles and one-year outcomes of patients with newly diagnosed atrial fibrillation in India: Insights from the GARFIELD-AF Registry.

BACKGROUND: The Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF) is an ongoing prospective noninterventional registry, which is providing important information on the baseline characteristics, treatment patterns, and 1-year outcomes in patients with newly diagnosed non-valvular atrial fibrillation (NVAF). This report describes data from Indian patients recruited in this registry. METHODS AND RESULTS: A total of 52,014 patients with newly diagnosed AF were enrolled globally; of these, 1388 patients were recruited from 26 sites within India (2012-2016). In India, the mean age was 65.8 years at diagnosis of NVAF. Hypertension was the most prevalent risk factor for AF, present in 68.5% of patients from India and in 76.3% of patients globally (P < 0.001). Diabetes and coronary artery disease (CAD) were prevalent in 36.2% and 28.1% of patients as compared with global prevalence of 22.2% and 21.6%, respectively (P < 0.001 for both). Antiplatelet therapy was the most common antithrombotic treatment in India. With increasing stroke risk, however, patients were more likely to receive oral anticoagulant therapy [mainly vitamin K antagonist (VKA)], but average international normalized ratio (INR) was lower among Indian patients [median INR value 1.6 (interquartile range {IQR}: 1.3-2.3) versus 2.3 (IQR 1.8-2.8) (P < 0.001)]. Compared with other countries, patients from India had markedly higher rates of all-cause mortality [7.68 per 100 person-years (95% confidence interval 6.32-9.35) vs 4.34 (4.16-4.53), P < 0.0001], while rates of stroke/systemic embolism and major bleeding were lower after 1 year of follow-up. CONCLUSION: Compared to previously published registries from India, the GARFIELD-AF registry describes clinical profiles and outcomes in Indian patients with AF of a different etiology. The registry data show that compared to the rest of the world, Indian AF patients are younger in age and have more diabetes and CAD. Patients with a higher stroke risk are more likely to receive anticoagulation therapy with VKA but are underdosed compared with the global average in the GARFIELD-AF. CLINICAL TRIAL REGISTRATION-URL: http://www.clinicaltrials.gov. Unique identifier: NCT01090362

Particle concentration calculations using CFD. A comparison

Three approaches for the calculation of the particle contaminant distribution in a room using CFD are described. The approaches are tested for two types of flow problems. The results indicate that the Euler approach, in which only the particle settling velocity is incorporated, presents an attractive alternative for the more precise Lagrange approach. The Passive Scalar approach should not be used when calculating the particle distribution in a room

CFD simulation of heat and smoke transport in an atrium : results from a reference study performed by different CFD-practitioners

No abstract