Evolution of Design Method Against Random Waves Statistical Properties and Spectral of Sea Waves Transformation and Deformation of Random Sea Waves Design of Breakwaters Design of Coastal Dikes and Seawalls Probabilistic Design of Harbor Facilities Harbor Tranquility and Vessel Mooring Hydraulic Model Tests with Random Waves Theoretical Description of Random Sea Waves Statistical Theory of Irregular Waves Techniques of Random Wave Analysis 2D Computation of Wave Transformation with Random Breaking and Nearshore Currents Statistical Analysis of Extreme Waves Prediction and Control of Beach Deformation Processes.

Random seas and design of maritime structures

Particle methods in ocean and coastal engineering

Numerical investigation of harbor oscillations induced by focused transient wave groups

Fluid–structure interaction in partially filled liquid containers: A comparative review of numerical approaches

Numerical simulation of linear water waves and wave–structure interaction

Conventional algebraic Volume of Fluid (VOF) schemes utilize a Crank-Nicholson-based unsplit advection framework which is necessary for maintaining second-order accuracy in time as well as to allow extension to arbitrary meshes. However, the unsplit advection approach proves to be a bottleneck to computational performance for CFD solvers opting for non-body-conforming Cartesian grids for treating complex domains and immersed boundaries. To this effect, we propose a general operator-splitting framework for algebraic VOF schemes and develop a direction-split version of the Compressive Interface Capturing Scheme for Arbitrary Meshes (CICSAM). The resulting operator-split CICSAM (OS-CICSAM) scheme is compared against unsplit CICSAM as well as two recent algebraic VOF schemes for standard advection tests. In terms of volume tracking performance as well as interfacial shape preservation, it is demonstrated that OS-CICSAM attains comparable or lower L1 error norm, has rates of convergence intermediate to first and second order and is at least 600% faster in comparison to unsplit algebraic VOF schemes. The OS-CICSAM scheme is then coupled with the in-house CFD solver IITM-RANS3D. The robustness of the proposed scheme is established by applying to benchmark problems such as Rayleigh-Taylor instability and free surface wave interactions with a structure. 

An efficient operator-split CICSAM scheme for three-dimensional multiphase-flow problems on Cartesian grids

Experimental investigation of offshore crane load during installation of a wind turbine jacket substructure in regular waves

This paper presents the results from a comprehensive experimental study on the Quadrant Face Pile Supported Breakwater (QPSB) in two different water depths exposed to three different oblique wave a...

Hydrodynamic characteristics of vertical and quadrant face pile supported breakwater under oblique waves

In recent years, City University research group is developing a meshfree method based on Meshless Local Petrov Galerkin Method using Rankin source function (MLPG_R). The proposed method, works well for the simulations that we have carried out so far and gave a reasonable agreement with the experimental results for the wave profile. However, there is fluctuation in the pressure time history sometimes. This will cause the major problem when extending this model for the wave-elastic structure interactions, wherein, the pressure time history should be smooth enough to make the iterations with the structural solver, to have a stable simulation and to have a proper convergence between the fluid and structural solver. In this paper, we will propose a new algorithm to minimize this fluctuation. The comparisons of the time history from the improved MLPG_R method with that of other existing schemes shows that the pressure time history is much smoother.

Simulation of 2D Breaking Waves By Using Improved MLPG_R Method

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D %' 'I /NLV` ,9 (! %' 323 & 0 %. 60,. 8 '8 'L 45 'L %'s L 0,. < 23 ' QD 45 9 ., ( ' +R % 8 ' 9B # ! &k !>=r % , (' Q8:C % D 7. ' $ 2.6 LicensingSupport ] '8:C % D ' 'L b/!H0 ' Q % L ! ' # (' QP #. # n23 N 3 4I ( 0, %. Q%0e p ( ! ' # ' Qm # H 45 $ )  §%® A! D %' 'I 8 'L ! 23 & 0D ! ' # (' QP # 45 g ^ ' #. 6 0 n 0 < (! ' # ' Q^ D X N (' Q/ D H $O=60 C 'L ! 'Y M 0 . Q 07 1 ' )  ] 0 / # ( D ( / W:<;""[ ) ( ! ' # ' QW # 4I ! %$/=60 Z # % ( ` # +K E2< ! % D %' 'L 3 I ! &V` # ' U D # Q% " N %., / 0 & 1. Q p ' #., * 0 D! 'L W L D' 8. # * 0 U! D %' 'I \ ('d ' . ' . 0 o A 8 ' ' $w[C #  'd 0 . Q% ' +8 ( 'r 2C P! ' D ( D 'L 1 &F 'L 1 V, D 'L 3 D I 3 5 P VI9G H #9 . # ^ / Y VI9B #9B. # H $ 3. IMPLEMENT ATION STATUS AND FUTURE WORK lj p0 45 | 45 ( z 'zb^h i #! 0 8 j+`! D 0 ' # 45 # ! &k ! ( 'c +n # +G2< Y! D %' 'I $<lj P0 45 Z 4% % 8 !H0 8 5 H /+a P 8 ! 0 ' QW V,'L ! !Y 'L #+a ! % r+a. ' ! %' ' j' %',9B+-. ' ! %' C # # N . 7 +3! % D ' 'L $ :C. # 'L &VL 2C P ^ 'L Q ' QY 0 > (! ' # ' QD D I , 'I 7 0 > V, $ ) 2C N 9BN # m 'L #+} ! * 0 * V,  ̄@}. # (' Qc # 4I ( H JZ _, +7! % D ' 'L P , 4I ( H 7 ' m , 45 Z U ('L ! Z23 0 :C D %' 'L b"! 0 ' Q% %$c;". 7 D I n! 'AN 8 ' ! 0 mNLVp _I9 ' ' Q^ %. n! D %' 'I X # ! k ! 'W ^ ' ! (. 3 D 3! \9 ' 'L 1 # ! 1 ' 4% % ' Q\ 8 ! 0 8 5 n+1 0 # P 9 ! $ 4. REFERENCES & Z°%. 'Ut> 'r$ ) ' ) 5 !H0W 8?, +G2< 7:C D %' 'I ?, ! &k ! ( 'r ] '* L! ' Q 3 +/±%252%2\3   ¡GHH   ¡} §    ® ́ §  £   §  §  q« § / §   H  ¡μ}¶1     ̈ § ¬H¡}·n # ̧  I¤ a   H a L¤   PY$ 1> ( 'r P$ ) ' ' ° $ ;"! 5 N L $ ) ! 0 & !H . rhU # 8 ! 0rglw0LVD . # ^ 1 # D0 $ ] vXvXve?, +G2< M I@o5JH3 » 9E o,$  1⁄4 7;^h`1:<;""[ ) =r ";"NI ! "?I 4I (! %$ 1⁄2X # %'|%$ 3⁄4,$  ¿ 7;^h`1:<;""[ ) ir ! ' # ' Q8?I 4I ! %$ 1⁄2n # 'j%$ 3⁄4,$  © 7?,4% ' W % . ' U ' *°5 rÀ^ % ' 's$ ~^h ig ) ( ' Q%. Q% ^+a /SI. & EVW +g # H 4, ! ^ # ! &k ! ( 'r$ Á # I    ®  G §  ¡nÂ1ÃXÄXμG2%Å5μE±5Æ ÇgÂZH· ® H¡}¡μ-Ã35 £% # ÄM5È §   ¡ §  BH ÇgÉO È     Ê`±%2%2%Å  o Pb^h ij?,! 0 8 7R # /3⁄4, R D  ́*Ë «T«X    5 ¡G    § 78H  5 ¡} §  |Ì ÍqÎ3 ¡ § È HPÌ,Æ5Æ5Æ 0L # r Ï%Ï 2<2<2^$ 211⁄4,$ Q5Ï =6"Ï _, D #!H0 8 9G3⁄45Ï

V. Sriram

Papers

An efficient operator-split CICSAM scheme for three-dimensional multiphase-flow problems on Cartesian grids

Experimental investigation of offshore crane load during installation of a wind turbine jacket substructure in regular waves

Hydrodynamic characteristics of vertical and quadrant face pile supported breakwater under oblique waves

Simulation of 2D Breaking Waves By Using Improved MLPG_R Method

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