Evaluation of Differential Settlement along Bridge Approach Structure on Soft Bangkok Clay

Excessive differential settlement along bridge approach is commonly found in the lower central region of Thailand. To overcome the differential settlement problem, engineers have developed different types of bridge approach structure and improved design procedures. Two types of bridge approach structure are currently used in Thailand, including...

Utilization of EPS Geofoam for Bridge Approach Structure on Soft Bangkok Clay

Differential settlement along bridge approach structure is one of the continuing problems for highway construction in Bangkok and its vicinities due to soft ground foundation. To minimize the differential settlement and serviceability failure, an approach slap on piles with varies pile length is a current geotechnical engineering practice for...

Hyper-Morphology: Experimentations with bio-inspired design processes for adaptive spatial re-use

Hyper-Morphology is an on-going research outlining a bottom-up evolutionary design process based on autonomous cellular building components. The research interfaces critical operational traits of the natural world (Evolutionary Development Biology, Embryology and Cellular Differentiation) with Evolutionary Computational techniques driven design...

Biomimetic Strategies in Tower Design: Towards the integration of tower subsystems

The paper argues that the tower needs to respond to its environment by changing from a closed building typology towards a heterogeneous, differentiated open system that can adapt to the changing conditions within and around it. This argument is supported by focusing on the analogies and principles of specific biological examples in order to...

Status of Wake Vortex Alleviation in the Framework of European Collaboration: Validation Using Tests and CFD Results

This document provides a synthesis of recent research studies that have been conducted in the last decade within several European projects from the 5th and 6th Framework Programmes. All these studies aimed at a better characterization of aircraft wake vortices and then at their subsequent control. In the latter case, the goal is to minimize the...

Application of Least-Squares Spectral Element Methods to Polynomial Chaos

This papers describes the use of the Least-Squares Spectral Element Method to polynomial Chaos to solve stochastic partial differential equations. The method will be described in detail and a comparison will be presented between the least-squares projection and the conventional Galerkin projection.

A new Eulerian Monte Carlo method for the joint velocity-scalar PDF equations in turbulent flows

In the field of turbulent combustion, Lagrangian Monte Carlo (LMC) methods (Pope, 85) have become an essential component of the probability density function (PDF) approach. LMC methods are based on stochastic particles, which evolve from prescribed stochastic ordinary differential equations (SODEs). They are used to compute the one-point...

The use of automatic differentiation for adjoint CFD codes

Optimisation of aerospace designs uses the linear gradients of the minimised objective functionals with respect to the specified design variables. These gradients can be computed using a linearised version (or the adjoint equivalent) of the CFD code that outputs the original objective functionals. The task of generating linear or adjoint code...

Enabling User-Driven Checkpointing Strategies in Reverse-Mode Automatic Differentiation

This paper presents a new functionality of the Automatic Differentiation (AD) Tool Tapenade. Tapenade generates adjoint codes which are widely used for optimization in CFD. Unfortunately, for large applications the adjoint code demands a great deal of memory, because it needs to store a large set of intermediates values. To cope with that...

Improving accuracy and robustness of a discrete direct differentiation method and discrete adjoint method for aerodynamic shape optimisation

This paper describes the recent activities developed at ONERA in the field of aerodynamic shape optimization using gradient based methods. Both discrete direct differentiation method and discrete adjoint method have been considered for the computation of the derivatives of a function with respect to the design parameters. The numerical methods...

Computation of topological sensitivities in fluid dynamics: Cost function versatility

Topology optimization of fluid dynamical systems is still in its infancy, with its first academic realizations dating back to as late as three years ago. In this paper, we present two approaches to fluid dynamic topology optimization that are based on potential flows and adjoint states, respectively. Special emphasis is paid to the computation...

Social differentiation within and outside the gated community of Tierra Grande, Lawaan, Talisay City, Cebu

Workshop 1. Session 1.2: Segregation and strategies of gating and withdrawal