Building Drainage System Simulation Analysis Based On Fluent

Building drainage system in China was first imitated the “Soviet Union”, tofollow the design concepts and data as the theoretical foundation of the buildingdrainage system. In home and abroad, pipe, pipe diameter, connection, testingmethods, and latitude are different, foreign test data can not be fully used in ourcountry. Therefore need to find a new way to support the theoretical development ofChina’s building drainage system. In recent years, a large number of new high-risebuildings, of which there are many Ultra-high-rise buildings, interior drainage systemto be that we explore in more depth and summary. The constant flow theory can notbe used to explain the phenomenon of the building within the drainage system ofnon-constant and instantaneous flow. And in building drainage, gas water two-phaseflow of hydraulic conditions, reflecting the complexity and variability of the buildinginterior drainage, so that our further theoretical studies are difficult.This article will effectively combine building drainage systems and computertechnology, the use of computational fluid dynamics fluid hydraulic conditions andthe establishment of a numerical model simulation, theory and practical tests to find areasonable point of deed. Using computer technology to replace the cumbersome andcomplex testing process, not only solved the experiment required to spend a lot ofmanpower, material and financial resources, but also to avoid some instability results.Abroad, this technology has been more mature applied to the field of construction ofdrainage model performance, the simulation results consistent with the experimentaldata a high degree. In China, the use of computer numerical simulation will be thebuilding drainage development of the industry trend, especially used in high-risebuildings. So far this field there is not much correlation study.Using FLUENT software, by numerical calculation and image displaytechnology, the12-story high-rise building drainage system into a two-dimensionalmodel to combine several different drainage conditions, and analysis of pipelinepressure fluctuations in the curve, the flow velocity and volume fraction distribution.Fluctuations in air pressure for the pipeline, the horizontal interaction between themanifold of a number of different layers of drainage in the drainage process. Inaddition to meet the tube to air pressure fluctuations±400Pa benchmarks under thepremise, analyzing the drainage stack drainage flow. Further organize the analysis ofsimulation data, concluded that:(1) Flow dates obtained by the simulation Toiletconstant flow drainage are consistent with the specification values, and high-risebuilding drainage pipe length, displacement of large pressure fluctuations within thetube is more obvious;(2) Toilet variable flow drainage, the pressure fluctuations inthe pipeline is less than a constant flow; the vertical pipe drainage ability insimulation is slightly larger than the specification value;(3)Studying the Toiletvariable flow drainage and tub a constant flow drainage at the same time, and morerealistic. When the high-rise building drainage riser DN100,the maximum drainagecapacity of5.0L/S.Another vertical pipe flow velocity is less than10m/s, withoutconsidering the deceleration of energy dissipation;(4) any layers of drainagetransverse branch tube drainage at the same time, the maximum negative pressure value is always in the lower part of the minimum drainage transverse branch tube. Butnot necessarily the drainage stacks the upper layers, while the drainage pipe, themaximum pressure value.This issue is discussed for effective integration of computer technology andbuilding drainage systems, the above conclusions on the theoretical analysis of thebuilding drainage system are used for your reference.