MSc Students
PhD Students
Journal Papers
Conference Papers

صفحات فارسی

•   RESEARCH  EXPERIENCES

Well able to carry out innovative scientific and engineering research projects individually as well as cooperating in, and coordinating research teams in addition well acquainted with computer systems, FORTRAN and basic programming compilers, graphics, typesetting and other facilities.

•          Development of a number of efficient two and three dimensional finite volume codes (using unstructured triangular and tetrahedral meshes) for numerical computation of pressure fluid flow by solving navier-stokes equations. The accuracy of the developed codes was assessed using available bench-mark cases and then they are applied  for solving internal and external engineering problems.

1.        Deviced the cell vertex finite volume method to solve the incompressible form of Navier Stokes equations for prediction of in viscid, viscous and turbulent velocity and pressure fields around complex two and three dimensional geometries (i.e. domes and storge tanks, tall buildings and complexes, cooling towers and neighboring buildings, aerofoils and complete aircraft) and and by the use of unstructured triangular and tetrahedral meshes (1998-2006).

2.        Numerical modeling of smoke distribution around buildings in urban environments using the FVM method to solve the two dimensional incompressible in viscid flow equations coupled with convection diffusion equations for the pollution transport (1999-2000).

•          Innovating development of a number of steady and transient two and semi-three dimensional finite volume codes (for solution of shallow water equations unstructured triangles) for numerical simulation of sub and super-critical  free surface flow problems. The codes are applied for solving complex engineering problems after assessing the accuracy of the numerical results by comparison with the analytical solution or experimental measurements of bench-mark tests.

1.        Numerical simulation of global currents and distribution of solable materials in Caspian Sea via computation of global currents due to inflow from the rivers, evaporations and rainfalls, coriolis effects and geometrical complexities of the coasts (2000-2001).

2.        Computer modeling of global transient currents and oil spill simulation in Persian Gulf due to tidal fluctuations in its main flow boundary, inflow from the rivers, evaporations, geometrical complexities of coasts and bed elevations, (2001 to date).

3.        Developed a flow solver for simulating tidal flows in multi branch estuaries. The code successfully solves depth average transient tidal flows in Khour-Mousa estuary with variable bed elevation and complex boundaries (2003).

4.        Development a finite volume flow-solvers for simulation of steady super critical flow in chute canals with non-parallel wall. Application of mesh refinement technique along the standing cross shock waves of super critical flow in canals with converging or diverging walls are two important features of these successful flow simulations (2001-2003).

5.        Developing a flow-solver for simulating mixed sub and super critical flows in parshall flumes and chute spillways discharging flood from the reservoirs. (2002-2004).

6.        Development a number of flow-solvers for simulation of turbulent modeling on unstructured triangular meshes. The code successfully solves depth average sub-critical circulating flows in canals with sudden expansions and branches as well as flow behind spore dikes with complex geometries (2001-2002).

7.        Multi-layer computing sub-critical wind induced flows in lakes and dam reservoirs with complex bed topology considering inflow from the river as well as outflows from bottom outlet and spillway. (2003-2004).

8.        Development a flow-solver for simulating depth average sub-critical circulating flows around bridge piers and bed scouring behind piers with various complex geometries (2003-2004).

9.        Developing a multi-layer upwind flow-solver for computing mixed sub and super critical flows from dam reservoir over steep slope bed of the chute spillways. (2004-2005).

10.     Completing the super critical flow-solver for prediction of air inception (from the water surface) point self airation  in  chute spillway flows. (2005-2006).

11.     Completing the super critical flow-solver for prediction of air inception (from the water surface) point self airation  in  step spillways. (2006-2007).

•          Having developed a number of innovative finite volume two and three dimensional codes (using unstructured triangular and tetrahedral meshes) for numerical simulation of heat generation and transfer sourcing from cement hydration in mass concrete structures (i.e. RCC dams) during or/and after the construction period. The numerical model provides the abilities of considering various effects of foundation and abutments as well as gradual setting of the new layers of fresh concrete by implementation of concept of equivalent time and maturity function of the concrete. The algorithm of the modeling facilitates considering various effects on boundaries (i.e. sloping faces, form-work, air and water ambient temperature). The applied algorithm for developing of the code can be considered somehow between FVM and FEM. The code is applied to solve typical real world problems after accuracy assessment of its various modules using the results of analytical solution or laboratory experiments for available test cases.

1.        Deviced the finite volume method to solve transient two dimensional transfer of the heat generated due to the cement hydration in mass concrete. Discritization of foundation zone by unstructured meshing enables the user to consider the non-homogeneous base-rock and using structured mesh for discretizing the concrete structure part of solution domain provides the ability of modeling  layered-base gradual increase of computational field (1999-2001).

2.        Developing the algorithm of the modeling the effect of post cooling pipes in two-dimensional modeling of heat generation and transfer in gradual setting the new layers of fresh concrete during and after construction of mass concrete structures (2001-2003).

3.        Deviced the finite volume method for three dimensional solution of transient transfer of the heat generated by the cement hydration in mass concrete of marine structures and large dams. The ability  to consider  flexible thickness and setting time of concrete layer and its material properties makes the code suitable for heat analysis of real world engineering problems (2002-2004).

•          Using finite volume method for efficient one dimensional solution of transient pipe flow and pressure oscillations due to water hammer in power plant penstocks with complex geometrical  and material charactristics. The accuracy of the developed codes was assessed using available bench-mark cases and then they are applied  for solving real engineering problems.

•          Development of a number of two and three dimensional steady and transient finite volume codes for solution of ground water and seepage equations on unstructured meshes. The codes are applied for solving complex engineering problems, such as salt water intrusion in unconfined and confined coastal aquifer (considering uderground dams and wells) as well as three dimensional uplift pressure and seepage fields under gravity dams). The developed codes are applied to some real world problems after assessing the accuracy of the numerical results by comparison with available experimental measurements or analytical solution of test cases.

-    Developing the finite volume solver for solving transient two dimensional ground water flow in unconfined and confined coastal aquifer and salt water intrusion (2004-2005).

-    Completing a three dimensional model for modeling uplift pressure and seepage fields in inhomogeneous and anisotropic foundation of  gravity dams using an unstructured algorithm. (2003-2004).

•          Successful application of finite element softwares for analyzing natural engineering processes such as problems association with free surface and pressure flows, fluid structure interactions and design optimization of gates.

1.        Three dimensional flow analysis in the Y-branch of hydro-power plants penstock using ANSYS flow-solver software (2002).

2.        Two and three dimensional numerical solution of flow field at the upstream of high head sliding and radial gates using ANSYS finite element software (2002)

3.        Weight optimization of end frames of low head radial gates using the finite element software, ANSYS (2003).

4.        Numerical analysis of the effect of upstream drainages on pore pressure and stability of eath dams in rapid drawdown condition by combined application of  MODFLOW and XSTABLE softwares (2002).

5.        Two dimensional vertical plane numerical solution of spillway free surface flow using the VOF modules of ANSYS finite element software (2003).

6.        Numerical analysis of hydrodynamic pressure on gravity dams due to earth quick effects by application of ANSYS finite element software (2003).

7.        Investigation of structural strength of stilling basin slabs under the effect of hydraulic jump and uplift pressures  by combined application of PLAXIS with ANSYS and SAFE softwares (2003)

•   RESEARCH INTERESTS

Some of the on going research works in the field of numerical simulation can be summarized as:

•          Application of topology optimization for optimal design layout of the arm frames of radial  gates (2003 to date).

•          Semi 3D simulation of tidal currents in Persian Gulf  by application of proper wet and drying techniques.

•          3D turbulent wind pressure and air flow around civil structures

•          Numerical modeling of heat conduction in cooling towers and the effect on thermal stresses in cooling towers

•          Interaction of air flow and geometric features of the cooling towers and ambient structures on efficiency of the cooling towers

•          Coupled numerical modeling of sloshing and structural behavior of the storage tanks

•          Numerical modeling of  gradual break of non-homogeneous embankment dams.

•          Modeling 3D seepage through non-homogeneous porous media considering water free surface line.

•          Coupled modeling of 3D heat generation and transfer in concrete structures and flow in cooling pipes

•         Eulerinan fluid-structure interaction modeling using finite volume method

•         Application of flow simulation in transportation engineering

•         3D simulation of  currents in Caspian Sea considering variable wind effects

•         Numerical modeling of  transient pressurized water flow and water hammer computations

•         semi-3D simulations of super free surface flow and air entrainment in step spillways.

•         Finite volume solution of stress-strain fields in structures.

•         Development of accurate sediment transport models