INVESTIGATION ON THE EVOLUTION AND PROPAGATION OF WAVES IN HIGHLY CONCENTRATED FLUID

Nannina Horstmann,Nils Kerpen,Nils Goseberg,Torsten Schlurmann

doi:10.9753/icce.v34.posters.24

Abstract

In the framework of an industry-funded research project in the Dead Sea, Israel, the evolution and propagation of waves in a fluid with high density (brine) was investigated. In general, the density as well as the viscosity of water is neglected in wave theories and run-up formulas due to the fact that fresh water at 20 °C exhibits a density of 1 t/m3 and a dynamic viscosity of 1x10 kg/(m s). Yet, it is unknown how significant changes of these parameters influence the sensitivity of wave propagation and wave run-up on sloping beaches. Hence, this project follows the scientific approach to study the behaviour of a fluid, i.e. brine, stemming from the Dead Sea (Israel) with a density of 1.23 t/m3 and a dynamic viscosity at 20 °C of 3.4x10 kg/(m s). In a newly constructed wave (twin) flume with two separated channels wave kinematics and run-up of brine have been compared directly with fresh water wave kinematics and run-up.

Highlights

In the framework of an industry-funded research project in the Dead Sea, Israel, the evolution and propagation of waves in a fluid with high density was investigated
The density and viscosity of brine yet differ by magnitudes from liquid properties of fresh or sea water
Wave heights have been measured with six wired wave gauges in the fresh water and with ultra sonic sensors in the brine

Summary

Introduction

In the framework of an industry-funded research project in the Dead Sea, Israel, the evolution and propagation of waves in a fluid with high density (brine) was investigated. The density as well as the viscosity of water is neglected in wave theories and runup formulas due to the fact that fresh water at 20 °C exhibits a density of 1 t/m3 and a dynamic viscosity of 1x10-3 kg/(m s) It is unknown how significant changes of these parameters influence the sensitivity of wave propagation and wave run-up on sloping beaches. This project follows the scientific approach to study the behaviour of a fluid, i.e. brine, stemming from the Dead Sea (Israel) with a density of 1.23 t/m3 and a dynamic viscosity at 20 °C of 3.4x10-3 kg/(m s). The results of brine wave heights in contrast with fresh water wave heights are shown and brine wave run-up will be compared with formulas of Hunt (1959) and EurOtop (2007)

Physical model description

Test results

Outlook