Cfd Simulation of Temperature Stratification for a Building Space: Validation and Sensitivity Analysis
نویسندگان
چکیده
Accurate and reliable CFD simulation of temperature stratification in indoor environment is needed for the design and evaluation of displacement ventilation in buildings. This paper presents a detailed and systematic evaluation of the capability of 3D steady RANS CFD simulations to predict the temperature stratification in a room. The evaluation is based on sensitivity analysis and validation with full-scale measurements of indoor air temperature. The results show that steady RANS can accurately predict the temperature stratification in an indoor environment. The SST kmodel shows a better performance compared with other considered turbulence models.
منابع مشابه
CFD Simulation of Dimethyl Ether Synthesis from Methanol in an Adiabatic Fixed-bed Reactor
A computational fluid dynamic (CFD) study of methanol (MeOH) to dimethyl ether (DME) process in an adiabatic fixed-bed reactor is presented. One of the methods of industrial DME production is the catalytic dehydration of MeOH. Kinetic model was derived based on Bercic rate. The parameters of this equation for a specific catalyst were tuned by solving a one-dimensional homogenous model using MAT...
متن کاملCfd Simulation of Fortum Pts Experiment
Detailed simulation of the thermal stresses of the reactor pressure vessel (RPV) wall in case of pressurized thermal shock (PTS) requires the simulation of the thermal mixing of cold high-pressure safety injection (HPI) water injected to the cold leg and flowing further to the downcomer. The simulation of the complex mixing phenomena including e.g. stratification in the cold leg and buoyancy dr...
متن کاملOn-Site Experimental Validation of a Coupled Multizone and CFD Model for Building Contaminant Transport Simulations
Previous studies indicated that the coupling of multizone and CFD (Computational Fluid Dynamics) models can provide a good compromise between the accuracy and required computation time. The results show that the coupled model predicts contaminant distribution more accurately than multizone model alone for the zones close to the contaminant source location. For all other zones, the multizone mod...
متن کاملEvaporative cooling by water spray systems: CFD simulation, experimental validation and sensitivity analysis
Evaporative cooling by water spray is increasingly used as an efficient and environmentally-friendly approach to enhance thermal comfort in built environments. The complex two-phase flow in a water spray system is influenced by many factors such as continuous phase velocity, temperature and relative humidity patterns, droplet characteristics and continuous phase-droplet and droplet-droplet inte...
متن کاملVariability of Thermal Stratification in Naturally Ventilated
Building energy simulation programs often use standard thermal comfort indices and thresholds as boundary conditions. However, most of them focus on comfortable indoor hydrothermal levels, rather than spatial distributions. This paper investigates internal temperature vertical stratification in naturally ventilated residential buildings. To evaluate this effect, a field study was carried out in...
متن کامل