Blar i NTNU Open på forfatter "Holmedal, Lars Erik"
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A rational approach to seepage flow effects on bottom friction beneath random waves
Myrhaug, Dag; Holmedal, Lars Erik; Ong, Muk Chen (Journal article, 2014)The bottom friction beneath random waves is predicted taking into account the effect of seepage flow. This is achieved by using wave friction factors for rough turbulent, smooth turbulent and laminar flow valid for regular ... -
Addendum to "Stokes transport in layers in the water column based on long-term wind statistics": assessment using long-term wave statistics
Myrhaug, Dag; Wang, Hong; Holmedal, Lars Erik (Journal article; Peer reviewed, 2019)This article addresses the Stokes drift in layers in the water column for deep water random waves based on wave statistics in terms of the sea state wave parameters significant wave height and mean zero-crossing wave period. ... -
Analysis of Observed Streaming in Field Measurements
Wang, Hong; Troels, Aagaard; Holmedal, Lars Erik; Myrhaug, Dag (Journal article; Peer reviewed, 2016)Analysis of velocity and suspended sediment concentration data from field measurements at Pearl Beach in New South Wales, Australia, reveals the existence of onshore currents in the close vicinity of the rippled bed, whereas ... -
Combined tidal and wind driven flows and residual currents
Holmedal, Lars Erik; Wang, Hong (Journal article, 2015)The effect of a residual current on the combined tidal and wind driven flow and the resulting bedload sediment transport in the ocean has been investigated, using a simple one dimensional two-equation turbulence closure ... -
Combined Waves and Tidal Current Flow over a Full Tidal Cycle
Ulstein, Eirik Rådmannsøy (Master thesis, 2019)Målet for dette arbeidet er å kunne forutsi effektene fra kombinert sinusformede overflatebølger og tidevannstrøm over en full tidevannssyklus. En en-dimensjonal turbulensmodell med to likninger har blitt brukt over middels ... -
Constructive Alignment in Science and Engineering: From Principle to Practice
Gynnild, Vidar; Leira, Bernt Johan; Myrhaug, Dag; Holmedal, Lars Erik; Mossige, Jon Coll (Journal article; Peer reviewed, 2019)This paper reports on an action research study on task design and constructive alignment in an optional module at the Norwegian University of Science and Technology. While students appreciated the two professors’ teaching, ... -
Effects of an inserted circular cylinder on a steady lid-driven rectangular cavity flow
Zhu, Jianxun; Holmedal, Lars Erik; Myrhaug, Dag (Journal article; Peer reviewed, 2019)This paper provides numerical investigations of flow in a steady lid-driven cavity of depth to width ratio 1/3 containing a circular cylinder. The inner cylinder is treated using a direct-forcing immersed boundary method, ... -
Fluid flow in steady and oscillatory lid-driven square cavities
Zhu, Jianxun; Holmedal, Lars Erik; Myrhaug, Dag; Wang, Hong (Peer reviewed; Journal article, 2017)This paper presents numerical simulations of steady and oscillatory lid-driven cavity flow at different Reynolds numbers with a fixed aspect ratio of 1:1. A projection method (P2 pressure correction method) is applied to ... -
Numerical Simulation of Flow around Single and Two side-by-side Square Cylinders with Horizontal Offsets Mounted on the Seafloor
Dai, Yukun (Master thesis, 2016)Computational Fluid Dynamics (CFD) have been applied to obtain essential hydrodynamic quantities and flow behaviors of single and two 2D wall-mounted square cylinders subjected to a uniform turbulent inflow. This is a ... -
Numerical Simulations of Swimming Fish
Mossige, Jon Coll (Master thesis, 2017)A profound understanding of how a fish swims may be used to design innovative propulsion units with higher efficiency than the conventional screw propellers. The gain of such understanding may be aided by the use of ... -
Seepage effects on bedload sediment transport rate by random waves
Myrhaug, Dag; Holmedal, Lars Erik; Ong, Muk Chen (Journal article, 2014)The mean net bedload sediment transport rate beneath random waves is predicted taking into account the effect of seepage flow. This is achieved by using wave half-cycle bedload sediment transport formulas valid for regular ... -
Stokes drift estimation for deep water waves based on short-term variation of wave conditions
Myrhaug, Dag; Wang, Hong; Holmedal, Lars Erik (Journal article, 2014)The paper provides a simple analytical method which can be used to give estimates of the Stokes drift based on short-term variation of wave conditions. This is achieved by providing bivariate distributions of wave height ... -
Stokes transport in layers in the water column based on long-term wind statistics
Myrhaug, Dag; Wang, Hong; Holmedal, Lars Erik (Journal article; Peer reviewed, 2018)This paper addresses the Stokes transport velocity for deep water random waves in given layers in the water column based on wind statistics, which can be estimated by the simple analytical tool provided here. Results are ... -
Suspended sediments due to random waves including effects of second order wave asymmetry and boundary layer streaming
Myrhaug, Dag; Ong, Muk Chen; Holmedal, Lars Erik (Journal article, 2015)The paper provides a practical stochastic method by which the suspended sediment concentration due to long-crested (2D) and short-crested (3D) nonlinear random waves can be calculated. The approach is based on assuming the ... -
Three-dimensional streaming in sea bed boundary layer
Afzal, Mohammad Saud (Doctoral theses at NTNU;2017:62, Doctoral thesis, 2017)The objective of the work carried out in the present thesis is to obtain new insights into wave- current seabed boundary layers by studying the wave-current interaction for the general case of a non-zero angle between the ... -
Tidal and Wind Driven Boundary Layer Flow in Coastal Zones
Andersen, Ingrid Rolland (Master thesis, 2018)The objective with this thesis is to investigate the start-up of a pure wind driven flow, and the effect of an suddenly increasing wind (starting from zero wind speed) on a tidally driven flow. This is done by performing ... -
Tidal boundary layer flow over a flat bottom with vegetation
Holmemo, Marius (Master thesis, 2016)A numerical k-epsilon model has been modified to account for the presence of submerged vegetation. The code has been successfully validated and run against tidal current measurement. The results looks promising. Especially ... -
Wave-induced current for long-crested and short-crested random waves
Myrhaug, Dag; Holmedal, Lars Erik (Journal article; Peer reviewed, 2014)This paper provides a simple analytical tool which can be used to calculate the wave-induced current beneath long-crested (2D) and short-crested (3D) random waves. The approach is based on assuming the waves to be a ...