TWO-WAY COUPLING OF 2D AND 3D MODELS FOR THE FORECAST OF HYDRODYNAMICS IN THE PERSIAN GULF

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 318

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شناسه ملی سند علمی:

ICOPMAS13_131

تاریخ نمایه سازی: 6 بهمن 1397

چکیده مقاله:

Over the past few decades, numerical modeling of ocean circulation with complex geometries became prevalent with rapid growth of computing power. As a result, researchers have been able to develop multiscale models for accurate and efficient simulation of oceans in large scale. 1D models are applicable for predicting scouring and sedimentation while 2D and 3D models with hydrostatic pressure assumption can be used for shallow waters where secondary flows and vertical gradients are negligible. However, in cases such as lakes, rivers with flood plains, intertidal zones and continental shelves, due to highpressure depression changes and presence of strong secondary currents, shallow water assumption cannot be applied. Accurate perdition of velocity field and the water surface in these cases requires non-hydrostatic 3D models. Generating a high quality mesh and imposing suitablesurface and bottom boundary conditions are two of the most challenging aspects of such 3D models which makes them computationally demanding. An effective way to address this issue is to couple numerical models. In the present study, numerical domain is comprised of two independent 2D and 3D unstructured triangular grids. A two-way coupling was employed by mapping the solution of one mesh onto another in overlapping regions at each time step. Therefore, performance and accuracy of each model was maintained while the total accuracy was improved due to more accurate imposition of initial and boundary conditions.

نویسندگان

Ehsan Sarhadizadeh

Department of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran

Kourosh Hejazi

Department of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran

Mohsen Soltanpour

Department of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran

Mohammad Hossein Nemati

Department of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran