Field Velocity Approach and Geometric Conservation Law for Unsteady Flow Simulations

AIAA Journal ◽  
2006 ◽  
Vol 44 (9) ◽  
pp. 2084-2094 ◽  
Author(s):  
Jayanarayanan Sitaraman ◽  
James D. Baeder
Keyword(s):  
Unsteady Flow ◽  
Conservation Law ◽  
Flow Simulations ◽  
Field Velocity ◽  
Geometric Conservation Law

scholarly journals On the Geometric Conservation Law for Unsteady Flow Simulations on Moving Mesh

2015 ◽  
Vol 126 ◽  
pp. 639-644 ◽  
Author(s):  
Rong Ma ◽  
Xinghua Chang ◽  
Laiping Zhang ◽  
Xin He ◽  
Ming Li
Keyword(s):  
Unsteady Flow ◽  
Conservation Law ◽  
Moving Mesh ◽  
Flow Simulations ◽  
Geometric Conservation Law

scholarly journals Study on Backwater Effect Due to Polavaram Dam Project under Different Return Periods

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 576 ◽  
Author(s):  
Amarnath C R ◽  
Shashidhar Thatikonda
Keyword(s):  
Unsteady Flow ◽  
Water Surface ◽  
Water Levels ◽  
Surface Elevation ◽  
Flood Frequency Analysis ◽  
Discharge Data ◽  
Gate Operation ◽  
Water Surface Elevation ◽  
Flow Simulations ◽  
Flood Discharge

In this study, we present a scenario to evaluate the backwater impacts on upstream of the Polavaram dam during floods. For this purpose, annual peak discharges across the different gauge stations in river stretch considered for flood frequency analysis. Statistical analysis is carried out for discharge data to estimate probable flood discharge values for 1000 and 10,000 years return period along with 0.1 and 0.14 million m3/s discharge. Furthermore, the resulting flood discharge values are converted to water level forecasts using a steady and unsteady flow hydraulic model, such as HEC-RAS. The water surface elevation at Bhadrachalam river stations with and without dam was estimated for 1000 and 10,000 years discharge. Unsteady 2D flow simulations with and without the dam with full closure and partial closure modes of gate operation were analysed. The results showed that with half of the gates as open and all gates closed, water surface elevation of 62.34 m and 72.34 m was obtained at Bhadrachalam for 1000 and 10,000 years. The 2D unsteady flow simulations revealed that at improper gate operations, even with a flow of 0.1 million m3/s, water levels at Bhadrachalam town will be high enough to submerge built-up areas and nearby villages.

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