Deep learning based prediction of fibrous microstructure permeability

Knowledge of permeability of fibrous microstructures is crucial for predicting the mold fill times and resin flow path in composite manufacturing. Herein we report a method to rapidly predict the permeability of 3D fibrous microstructures. Our method relies on predicting the permeability of 2D cross-sections via deep neural networks and...

Numerical analysis of calcium leaching on the durability of dam concrete

Concrete dams are subjected to soft water penetration of a high water head during their long service lives. Degradation due to calcium leaching will decrease the durability of the concrete and affect dam safety. The long-term performance of concrete dams due to calcium leaching should be evaluated and predicted accurately to complete the...

Experimental and numerical study of historic masonry with bed joint reinforced repointing

Induced seismicity due to gas extraction in the province of Groningen in the Netherlands has a noticeable impact on building structures. Historic masonry structures in the area, which are non-engineered and lacking empirical design features often present in traditionally seismic regions, are especially vulnerable to dynamic loading. Compounding...

Convergence of Newton’s Method for Steady-State Load Flow Problems in Multi-Carrier Energy Systems

Coupling single-carrier networks into multi-carrier energy systems (MESs) has recently become more important. Various formulations of the single-carrier load flow problem (LFP) are used. Moreover, different coupling models lead to different integrated systems of equations for the LFP of MESs. Both could affect the convergence of the Newton...

Solving the Steady-State Power Flow Problem on Integrated Transmission-Distribution Networks: A Comparison of Numerical Methods

Steady-state power flow models are essential for daily operation of the electricity grid. The changing electrical environment requires a shift from separated power flow models to integrated transmission-distribution power flow models. Integrated models incorporate the coupling of the networks and the interaction that they have on each other,...

Design of Deep Supported Excavations: Comparison Between Numerical and Empirical Methods

This paper focuses on the derivation of design prop loads for supported excavations in stiff clay with increasing excavation depth and number of prop levels. For multi-propped walls there are a number of empirical graphs to obtain the design prop forces. CIRIA C517 (Twine & Roscoe, 1999) enhancing Terzaghi & Peck's work (Terzaghi & Peck (1967)...

Modeling of low-capillary number segmented flows in microchannels using OpenFOAM

Modeling of low-Capillary number segmented flows in microchannels is important for the design of microfluidic devices. We present numerical validations of microfluidic flow simulations using the volume-of-fluid (VOF) method as implemented in OpenFOAM. Two benchmark cases were investigated to ensure the reliability of OpenFOAM in modeling complex...

Numerical analysis of aneurysm using pulsatile blood flow through a locally expanded vessel

A numerical analysis based on a finite volume approach is employed for a 2-D axisymmetric, incompressible, laminar and transient flow in order to simulate the pulsatile blood flow in aneurysm. The unsteady nature of the blood is studied for three Womersley numbers and for three rheological models including Newtonian, Power law and Quemada. A...

Numerical Investigation of the Effect of Base Bleed on Thrust of a Truncated Aerospike Nozzle in Off-design Conditions

Aerospike nozzles are known to produce more thrust than conventional convergent-divergent nozzles in off-design conditions because of their capability to adapt their boundaries to ambient conditions. However, the central plug of an ideal aerospike nozzle can be very long and heavy, and its sharp end is susceptible to deformation in high...

A numerical analysis for the dissolution of second phase particles in ternary alloys