Sebastian Schreier

Bio: Sebastian Schreier is an academic researcher from University of Rostock. The author has contributed to research in topics: Sensitivity (control systems) & Liquefied natural gas. The author has an hindex of 4, co-authored 9 publications receiving 27 citations.

Application of Heat-Transfer Calculations and Computational Fluid Mechanics to the Design of Protective Clothing

Abstract: Three examples of use of computational fluid dynamics for designing clothing protecting a human body from high and low temperatures with an incident air fl ow and without it are presented. The internal thermodynamics of a human body and the interaction of it with the surroundings were investigated. The inner and outer problems were considered separately with their own boundary conditions.

Sensitivity Study on the Influence of the Filling Height on the Liquid Sloshing Behavior in a Rectangular Tank

Abstract: In sloshing model tests one of the most influential parameter of the test conditions is the liquid filling height. A basic study of this parameter was encouraged during the second (2013) ISOPE Sloshing Model Test Benchmark campaign. Against this background a detailed sensitivity study on the influence of the filling height on the sloshing behavior of single wave impacts is carried out for a rectangular tank at model scale. The exciting motion of the tank is one-dimensional and designed to lead to single wave impacts on the tank roof. The sloshing behavior at high filling levels is characterized by the maximum sloshing pressures and the time delay between the tank motion and the sloshing impact as well as the oscillation frequency of the pressure signal. The present study describes the sensitivity of the sloshing motion and the resulting impact pressures to small variation of the filling height.

Sloshing in LNG Tanks: Assessment of High and Low Pressures

Abstract: In the assessment of 2D numerical simulations of liquid sloshing in partially filled membrane-type cargo tanks of LNG Carriers high pressure impacts and also particularly low pressures have been identified. One high pressure impact at low filling levels and one sloshing impact leading to particularly low pressures at high filling levels are studied in greater detail. The results of these investigations are presented and conclusions are drawn with respect to the underlying physics of the two phenomena.

Experimental Investigation of 3D Sloshing Effects In Thin Rectangular Tanks

Abstract: In the present investigation 3D effects in liquid sloshing are analyzed based on model tests using two rectangular tanks of identical length and height but different width under harmonic translational excitation in the longitudinal direction. The 3D effects are analyzed based on the assessment of pressure time series and high speed video images, as well as stochastic analysis. The results of this study clearly identify 3D effects in liquid sloshing and suggest that these effects become more prominent with increasing width of the tank.

Assessment of Transient Sloshing Due to Encounter of an LNG Carrier With a Steep Wave

Abstract: This study investigates a transient sloshing flow in a rectangular tank by comparing model tests and unsteady Reynolds-Averaged Navier-Stokes CFD simulation. The sloshing flow is excited by a normally periodic surge motion, which is then subjected to a transient akin to an LNG carrier encountering a particularly steep wave. It is found that the impact pressure recorded in the transient motion is several times greater than that observed at resonance. High speed video data and CFD simulation is used to analyse the sloshing flow. The severity is explained by the absence of entrained air bubbles prior to impact and the second mode response one half period before impact.

Experimental investigation of dynamic pressure loads during dam break

Abstract: The objectives of this work are to revisit the experimental measurements on dam break flow over a dry horizontal bed and to provide a detailed insight into the dynamics of the dam break wave impacting a vertical wall downstream the dam, with emphasis on the pressure loads. The measured data are statistically analyzed and critically discussed. As a result, an extensive set of data for validation of computational tools is provided.