SL/T 164-2019 in English
VALIDTechnical code for simulation of dam - break flow
- Issued on:2019-11-13
- Implemented on:2020-02-13
- File Format:PDF
- Delivery:Via email within 5 business days
$495.00
| Standard No: | SL/T 164-2019 |
| Document status: | VALID |
| Title in English: | Technical code for simulation of dam - break flow |
| Title in Chinese: | 溃坝洪水模拟技术规程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2019-11-13 |
| Implemented on: | 2020-02-13 |
| Superseding: |
SL 164-2010 Regulations for simulation of dam-break flow
|
| Professional Classification: | SL-Water Resources |
| Related Keywords: | dam break simulation technology
key technologies dimension model test numerical simulation similarity criterion froude criterion numerical simulation numerical simulation implementation process determine certain earth-rock dam project |
| Related Topics: | flood
flood measurement Dam break mock english dam flood event simulation Technical regulations for dam break flood simulation Flood Code Simulation sl/t 789-2019 mt/t 164-2019 |
Introduction
Background of Standard Revision and Technological Evolution
This standard replaces the SL 164-2010 version, and mainly adds three-dimensional mathematical model control equations (Appendix B), image acquisition and analysis technology, etc., reflecting the three major advances in dam break simulation technology between 2010 and 2019: high-precision measurement technology, coupling algorithm and dynamic grid technology.
Comparative Analysis of Key Technologies
| Dimension | Model Test | Numerical Simulation |
|---|---|---|
| Similarity Criterion | Froude Criterion (Article 4.1.1) | NS Equation/Saint-Venant Equation (Article 5.1.1) |
| Equipment Requirements | Wave Height Meter, PIV System (Article 4.2.2) | High Performance Computing Cluster |
| Precision Control | Water level error ≤ 10cm (Article 4.5.3) | Grid independence verification (Article 5.3.4) |
Analysis of implementation points
Typical case of model test
A certain earth-rock dam project adopted a 1:100 normal model (Article 4.3.3) and measured the breach flow velocity with a acoustic Doppler flowmeter. The key finding was that the peak flow rate at the initial stage of breach reached 2.3 times the design value, which verified the rationality of the trapezoidal breach.
Numerical simulation implementation process
- Determine the calculation domain (Article 5.2.1)
- Select the RNG k-ε turbulence model (Article 5.1.3)
- Dynamic meshing (Article 5.3.2)
- Parameter sensitivity analysis (Article 5.4.2)
Innovative technical terms
Three-dimensional coupling model (Article 5.1.2) is included in the standard for the first time and is applicable to:
① Flood evolution in complex terrain areas
② Simulation of breach scouring process
Pay special attention to the mass conservation of connection interface conditions (Article 5.2.5)
Application suggestions
For important water conservancy projects, it is recommended to adopt the model test + numerical simulation dual verification mode (Article 1.0.3), focusing on:
1. The variation rate of the abnormal model is ≤5 (Article 4.3.3)
2. Numerical stability of moving boundary treatment (Article 5.2.3)
3. Verification of historical flood data (Article 3.2.3)
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