Numerical Simulation of flow field in compound channel with sloping plain flood with the presence of bridge abutment with different dimensions and shapes

Numerical Simulation of flow field in compound channel with sloping plain flood with the presence of bridge abutment with different dimensions and shapes


Numerical Simulation of flow field in compound channel with sloping plain flood with the presence of bridge abutment with different dimensions and shapes

نوع: Type: thesis

مقطع: Segment: masters

عنوان: Title: Numerical Simulation of flow field in compound channel with sloping plain flood with the presence of bridge abutment with different dimensions and shapes

ارائه دهنده: Provider: Mehran Heshmatian

اساتید راهنما: Supervisors: Dr.Majid Fazli

اساتید مشاور: Advisory Professors:

اساتید ممتحن یا داور: Examining professors or referees: Dr. Jalal Sadeghian and Dr.Morteza shokri

زمان و تاریخ ارائه: Time and date of presentation: 2022

مکان ارائه: Place of presentation: Seminar 2 of Civil Engineering

چکیده: Abstract: Forecasting the river flow field is very important, especially during floods and when forming composite sections. in This research investigates the simulation of the flow field in the compound channel with the sloping flood plain with the presence of bridge abutment with different dimensions. For this purpose, FLOW-3D computing software and turbulence models of renormalized groups (RNG), large eddy simulation (LES), two-equation k-ω and two-equation k-ε have been used. First, the simulated results in the 15 cm abutment were calibrated with the laboratory model, and then the simulated results in the 20 cm abutment were verified with the laboratory results, Also, two grids with coarse and fine meshes have been used in dimensions of 0.023 and 0.018 meters, respectively. which has reduced the number of computing cells from 737,000 to 392,060. The obtained results indicate that the k-ω model has the best match with the laboratory data. So that the root mean square error (RMSE) percentage between the disturbance model k-ω and the laboratory model investigated in this research is 5.338% for predicting the longitudinal velocity and in general it can be said that the Flow 3D software has a good ability has To simulate a compound channel with a sloping floodplain