Assistant Engineering

Rocan Chung

actively looking for opportunity

accb9x@r.postjobfree.com

Summary

I’m looking for fulltime position to contribute by combining my strong quantitative coding and numerical

modeling expertise.

Six-years experience for designing numerical code, building hydraulic model, and analyzing simulation data.

Publish research results to journal paper and international conference.

Provide consulting to government and water resources agency.

Experience

Engineering Assistant at Water Resources Agency

August 2012 - August 2013 (1 year 1 month)

Served in the Water Hazard Mitigation Center. Responsible for operating the SOP of the National Central

Water Hazard Mitigation System, including analyzing QPESUMS rainfall data, initiating central water hazard

report system, and communicating between departments.

Research Assistant(Ph.D. candidate) at National Chiao Tung University

July 2006 - July 2012 (6 years 1 month)

Built Java user interface for Fortran hydrology model

Built regression models from simulated and measured data

Built high performance code in Fortran under UNIX and Windows

Analyzed the dynamic relation between rainfall data, river flow surface, ocean surface, soil composition, and

digital terrain model.

Volunteer Experience

Computer Room Assistant at Sunnyvale community center

October 2013 - Present (4 months)

Served in the senior center computer LAB

Teach senior people basic computer skills

Help client with on-line job search, setting up email and Learner Web software

Coach on document editing and photo management

Assist with specials projects and lab maintenance

Remind participants of lab rules and help maintain professional environment

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Projects

Development and Application of Computation Model and Regulation Planning Rules for

Hyper-Concentrated Flow

March 2006 to December 2008

Members:Rocan Chung

I was responsible for developing numerical code, building numerical model to simulate hyper-concentrated

flow, which is considered as Bingham flow, and analyzing the impact to river construction. The results can be

used by Water Resource Agency to measure the hazard levels.

Simulation and Experiment Studies for Bed Evolution in Hyper-Concentrated Flow River

March 2009 to December 2011

Members:Rocan Chung

I was responsible for further improving the developed numerical code and model in the last project to enable

simulation of bed scour and deposition. Then I analyzed the accuracy improvements between the simulation

results and aerial photography data.

Publications

Development and Application of a Three-Dimensional Model for Hyper-Concentrated Flow and

Sediment Transport in Alluvial Channels

National central library, Taiwan July 2012

Authors: Rocan Chung

To investigate the transport behavior of hyper-concentrated flow and as a result to provide as a reference for

engineering planning of practical cases, a hydrostatic three-dimensional model for hyper-concentrated flow

and sediment transport in alluvial channels was developed in this study. By following the vertical and

horizontal splitting concept (VHS), the shallow water flow governing equations were split into two parts

including the depth-averaged two-dimensional equations and velocity defect equation in vertical direction.

The former one was transformed into orthogonal curvilinear coordinate system; the latter one was derived as

the form of sigma coordinate. Incorporated with continuity equation, the three-dimensional velocity field can

therefore be solved. Sediment transport governing equations include three-dimensional mass transport

equation, active-layer continuity equation, and bed-layer continuity equation. The effects of

hyper-concentrated flow were treated as follows: a quadratic rheological relation was used to reflect the

characteristics of non-Newtonian fluid; a state function was used to reflect the influence of concentration to

density; the empirical suspended- and bed-load formulae with hyper-concentrated flow effect were used for

the sediment transport computation.

Sensitivity analysis was performed first to identify the weighting of parameters to be calibrated in the model.

The influence extent induced by the parameters on water flow, suspended sediment concentration, and bed

evolution, thereafter were examined and justified. The case of dam-break wave propagation of

non-Newtonian fluid was simulated to demonstrate the limit of traveling distance of hyper-concentrated flow.

A channel bend flow experiment with 40% volume concentration of sediment was studied to investigate the

effect of hyper-concentrated flow on super-elevation of water surface.

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Two Dimensional Shallow–Water Flow Model with Immersed Boundary Method

Computers & Fluids 2011

Authors: Rocan Chung, Te-Yung Hsieh, Jinn-Chuang Yang

This study demonstrates an immersed boundary (IB) method which integrates a depth-averaged two

dimensional flow model is proposed to tackle a typical fluid–solid phase problem in fluid dynamics field. The

finite-difference scheme with curvilinear coordinate system is employed to discretize the shallow-water flow

equations. Lagrangian markers and Eulerian grid are applied to portray the geometric contour of interior

boundary and discretize the flow domain, respectively. The Dirac delta function is accordingly conducted to

link both Lagrangian and Eulerian coordinate systems. The numerical simulations of single pier are

performed and compared to examine the effect of marker’s mesh width, grid size, and the various Dirac delta

functions. Experimental data from literatures are compared with numerical results to justify the validity of the

proposed IB model. To further demonstrate the model capability, the model is applied to the hypothetical

cases of piers in parallel, and compared with theoretical results.

Languages

English (Professional working proficiency)

Chinese (Native or bilingual proficiency)

Skills & Expertise

Numerical Simulation

Fluid Dynamics

Sediment Transport

Fortran

Mathematical Modeling

Hydraulics

Water Engineering

Modeling

Simulations

Finite Element Analysis

Programming

Experimentation

Engineering

Water

Numerical Analysis

CFD

Education

National Chiao Tung University

Master, Major in civil Engineering, Hydraulics and numerical modeling, 2004 - 2006

National Chiao Tung University

Master, minor in Information Management, 2004 - 2006

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Interests

Biking, hiking

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Rocan Chung

actively looking for opportunity

accb9x@r.postjobfree.com

Contact Rocan on LinkedIn

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Contact this candidate