Architectural Engineering Commons^™

Development Of Simulation Modules For Liquid Desiccant Systems In Sorpsim, Zhiyao Yang

Open Access Theses

Liquid Desiccant Systems (LDS) have been an attractive alternative to the conventional vapor-compression air conditioning technology in HVAC applications for their thermally-driven nature and the expertise in dealing with large latent load in a more energy-efficient way. Much effort has been made during the past decades to study the performance of LDS and their components both experimentally and through modelling approach. However, predicting the performance of LDS is still a skill-demanding task because it involves model implementation, retrieval of fluid properties, solving procedure setup, and preparation of a good set of initial guess value to model just one component. It …

Modeling Person-To-Person Contaminant Transport In Enclosed Environments, Chun Chen

Open Access Dissertations

It is essential to predict person-to-person contaminant transport in enclosed environments to improve air distribution design and reduce the infection risk from airborne infectious diseases. This study aims to improve and accelerate the simulation of person-to-person contaminant transport in enclosed environments. ^ This investigation first conducted experimental measurements of person-to-person contaminant transport in an office mockup and the first-class cabin of a functional MD-82 aircraft. The experimental data of steady-state airflow, temperature, and gas contaminant concentration fields obtained in the office were used to validate the steady-state computational fluid dynamics (CFD) models. In the aircraft cabin, the transient particle concentrations …

Pod Network News Spring 2015

Professional and Organizational Development Network in Higher Education: POD Network News

President's Message

Notes from the POD Office

Conference News

Committee Updates

Journal Updates

Member News

POD Essays on Teaching Excellence

Submission Guidelines

Contact the Editor

Indygo Downtown Transit Center - Transforming Indianapolis, Ben Smith, Steve Robinson, Joe Fischer

Purdue Road School

The new IndyGo Downtown Transit Center will transform transit in downtown Indianapolis and offers lessons in transit planning, traffic planning, intermodal connectivity, public engagement, and pedestrian access. This presentation will give an overview of the facility and then focus on attributes of the facility and of the design process that might offer useful lessons to other transit projects, including those of a smaller scale

Ua66 Ogden College Of Science & Engineering Newsletter, Cheryl Stevens, Dean

Ogden College of Science & Engineering Publications

No abstract provided.

Aspen Art Museum, Rumiko Handa

Architecture Program: Faculty Scholarly and Creative Activity

'I hope when people come to the New Aspen Art Museum they will sense that this building is very much at home in Aspen and could only live here', Shigeru Ban states in a short essay to visitors included in the museum brochure. Indeed, the way in which Ban's design fits uniquely within its context is nothing less than extraordinary. A full appreciation of his accomplishment, however, requires a study of Aspen's history.

What strategies are available to the architect who intends to design a museum that fits well for a community with keen interests in arts but lacking in …

The Bridge Newsletter Spring 2015, Missouri University Of Science And Technology

The Bridge Newsletter

-Wastewater treatment technologies that cost less and save energy
-Open windows and air quality
-Bartels displays research
-NASA honors Schonberg

The 2014 François Naftali Frenkiel Award For Fluid Mechanics, Benjamin D. Mater, Simon M. Schaad, Subhas Karan Venayagamoorthy

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

Failure At Fidenae: Visualization And Analysis Of The Largest Structural Disaster In The Roman World, Rebecca Napolitano

Physics, Astronomy and Geophysics Honors Papers

A digital reconstruction of the amphitheater at Fidenae, which collapsed in 27 A.D., was produced as a result of textual, architectural, archaeological, and engineering analysis. Primary literary sources, such as Tacitus and Suetonius, examined in conjunction with proximal archaeological evidence, allowed for the most probable seating capacity and the scale of the amphitheater to be determined. Architectural evidence of other wooden structures found on Trajan’s Column allowed for a most probable projection of a three dimensional model to be created using AutoCAD. With this most probable model determined, engineering analysis was utilized in order to understand the failure at Fidenae …

2015 Scholarly Productivity Report, Missouri University Of Science And Technology

Civil, Architectural and Environmental Engineering Scholarly Productivity Reports

No abstract provided.

Influence Of Collaborative Learning On Women’S Experiences Of Engineering Education, Shannon Chance, Brian Bowe

Other resources

In a study of 55 electrical engineering students, Yadav, et al., found learning gains among students in Project-Based Learning (PBL) to be twice the gains of those taking traditional lecture courses. Du and Kolmos indicate groupbased PBL is more supportive and appealing to women than traditional lecture formats. Savin-Baden posits that female and minority students are more likely to ask questions in non-competitive PBL environments. This study interrogates the claim that PBL is particularly supportive to female and minority students. This work-in-progress uses a phenomenological research methodology to investigate how collaborative learning (in formal as well as non-formal settings) influences …

Evaluation Of An Improved Technique For Geosynthetic-Reinforced And Pile-Supported Embankment, Jun Zhang, Shao Wen Liu, He Fu Pu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

With a large number of applications of conventional technique for geosynthetic-reinforced and pile-supported (GRPS) embankment (called CT embankment), many deficiencies have been exposed. In view of the deficiencies, an improved technique, fixed-geosynthetic-reinforced and pile-supported embankment (called FGT embankment), is developed. To investigate the performance of the FGT embankment, the comparison analyses and parametric studies are conducted by Finite Element Method (FEM). The influencing factors investigated include elastic modulus of soil, tensile stiffness of geosynthetics, pile length, pile spacing, and pile elastic modulus. In addition, the cost evaluation for the FGT embankment and CT embankment is also made. The results show …

Flexural Behavior Of High-Volume Fly Ash Concrete Beams: Experimental Study, Mahdi Arezoumandi, Carlos A. Ortega, Jeffery S. Volz

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

An experimental investigation was conducted to study both mechanical properties and the flexural strength of full-scale reinforced concrete beams constructed with both high-volume fly ash concrete-concrete with 70% of the cement replaced with fly ash-and conventional concrete (CC). The beams were tested under a simply supported four-point loading condition. The experimental cracking, yielding, and ultimate moments as well as deflection on ultimate load of the beams were compared with both the ACI 318-11 and Eurocode 2-05 provisions. Furthermore, the experimental flexural strengths of the beams were compared with both the modified compression field theory method and a flexural test database …

Ua66 Ogden College Of Science & Engineering Newsletter, Cheryl Stevens, Dean

Ogden College of Science & Engineering Publications

No abstract provided.

Ua3/1/5/3 President's Office-Cherry Campus Building Campaign, Wku Archives

WKU Archives Collection Inventories

Records created by the President's Office during the Henry Cherry administration regarding the construction of WKU. This series is not completely processed.

Architectural Acoustical Oddities, Zev C. Woodstock, Caroline P. Lubert

Department of Mathematics and Statistics - Faculty Scholarship

This paper offers a review of two types of acoustic oddity caused by periodic architecture. These periodic structures of interest are brick plazas and staircases with special dimensions. When an observer stands by one of these periodic structures and produces a percussive white noise, a high-pitched sound can be heard. The frequency of the returned sound is unrelated to the initial sound, and completely determined by the architecture of the structures themselves. This phenomenon is called repetition pitch. Comparative work done at James Madison University is offered to show the relationship between brick plazas at JMU and the repetition pitch …

Air Change Rate Vs Airflow Pathway: Bioaerosol Containment And Removal In Patient Rooms, Kevin R. Grosskopf

Durham School of Architectural Engineering and Construction: Faculty Publications

Recent studies have shown that higher air change rates may have the unintended consequence of creating turbulent airflows that entrain high concentrations of infectious particles within the breathing zone, and possibly, breakdown pressure relationships necessary to contain the spread of infectious particles to other clinical spaces.

Biases In Thorpe-Scale Estimates Of Turbulence Dissipation. Part I: Assessments From Large-Scale Overturns In Oceanographic Data, Benjamin D. Mater, Subhas K. Venayagamoorthy, Louis St Laurent, James N. Moum

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Oceanic density overturns are commonly used to parameterize the dissipation rate of turbulent kinetic energy. This method assumes a linear scaling between the Thorpe length scale LT and the Ozmidov length scale LO. Historic evidence supporting LTLO has been shown for relatively weak shear-driven turbulence of the thermocline; however, little support for the method exists in regions of turbulence driven by the convective collapse of topographically influenced overturns that are large by open-ocean standards. This study presents a direct comparison of LT and LO, using vertical profiles of temperature and microstructure shear collected in the Luzon Strait-a site characterized by …

Comparisons Of Horizontal-Axis Wind Turbine Wake Interaction Models, Jordan M. Wilson, Cole J. Davis, Subhas K. Venayagamoorthy, Paul R. Heyliger

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this study, Reynolds-averaged Navier-Stokes (RANS) simulations are performed using the k-ϵ and k-ω shear stress transport (SST) turbulence closure schemes to investigate the interactions of horizontal-axis wind turbine (HAWT) models in the neutrally stratified atmospheric boundary layer (ABL). A comparative study of actuator disk, actuator line, and full rotor models of the National Renewable Energy Laboratory (NREL) 5 MW reference turbine is presented. The open-source computational fluid dynamics (CFD) code open foam 2.1.0 and the commercial software ANSYS fluent 13.0 are used for simulations. Single turbine models are analyzed for turbulent structures and wake resolution in the downstream region. …

The Formation And Fate Of Internal Waves In The South China Sea, Matthew H. Alford, Thomas Peacock, Jennifer A. Mackinnon, Jonathan D. Nash, Maarten C. Buijsman, Luca A. Centurioni, Shenn-Yu Chao, Ming-Huei Chang, David M. Farmer, Oliver B. Fringer, Ke-Hsien Fu, Patrick C. Gallacher, Hans C. Graber, Karl R. Helfrich, Steven M. Jachec, Christopher R. Jackson, Jody M. Klymak, Dong S. Ko, Sen Jan, T. M. Shaun Johnson, Sonya Legg, I-Huan Lee, Ren-Chih Lien, Matthew J. Mercier, James N. Mourn, Ruth Musgrave, Jae-Hun Park, Andrew I. Pickering, Robert Pinkel, Luc Rainville, Steven R. Ramp, Daniel L. Rudnick, Sutanu Sarkar, Alberto Scotti, Harper L. Simmons, Louis C. St. Laurent, Subhas Karan Venayagamoorthy, Yu-Huai Wang, Joe Wang, Ying J. Yang, Theresa Paluszkiewicz, Tswen-Yung David Tang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Internal gravity waves, the subsurface analogue of the familiar surface gravity waves that break on beaches, are ubiquitous in the ocean. Because of their strong vertical and horizontal currents, and the turbulent mixing caused by their breaking, they affect a panoply of ocean processes, such as the supply of nutrients for photosynthesis¹, sediment and pollutant transport² and acoustic transmission³; they also pose hazards for man-made structures in the ocean⁴. Generated primarily by the wind and the tides, internal waves can travel thousands of kilometers from their sources before breaking⁵, making it …

Vibration Of Steel-Framed Floors Supporting Sensitive Equipment In Hospitals, Research Facilities, And Manufacturing Facilities, Di Liu

Theses and Dissertations--Civil Engineering

Floors have traditionally been designed only for strength and deflection serviceability. As technological advances have been made in medical, scientific and micro-electronics manufacturing, many types of equipment have become sensitive to vibration of the supporting floor. Thus, vibration serviceability has become a routinely evaluated limit state for floors supporting sensitive equipment. Equipment vibration tolerance limits are sometimes expressed as waveform peak acceleration, and are more often expressed as narrowband spectral acceleration, or one-third octave spectral velocity.

Current floor vibration prediction methods, such as those found in the American Institute of Steel Construction Design Guide 11, Floor Vibrations Due to Human …

Effect Of Fly Ash Replacement Level On The Bond Strength Of Reinforcing Steel In Concrete Beams, Mahdi Arezoumandi, Trevor J. Looney, Jeffery S. Volz

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study compares the bond strength of reinforcing steel in high-volume fly ash concrete (HVFAC) mixes. Three mixes with 0% (conventional concrete), 50%, and 70% replacement of Portland cement with a Class C fly ash investigated in this study. Three beams (simply supported four-point loading condition) as well as three pull-out specimens (based on RILEM recommendations) were tested for each mix. Test results evaluated based on different codes as well as a bond database of conventional concrete specimens. These comparisons indicate that with increasing replacement level of fly ash in concrete the bond strength of reinforcing steel in concrete increases. …

Development Of Composite Pcms By Incorporation Of Paraffin Into Various Building Materials, Shazim Ali Memon, Wenyu Liao, Shuqing Yang, Hongzhi Cui, Syed Farasat Ali Shah

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this research, we focused on the development of composite phase-change materials (CPCMs) by incorporation of a paraffin through vacuum impregnation in widely used building materials (Kaolin and ground granulated blast-furnace slag (GGBS)). The composite PCMs were characterized using environmental scanning electron microscopy (ESEM), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. Moreover, thermal performance of cement paste composite PCM panels was evaluated using a self-designed heating system. Test results showed that the maximum percentage of paraffin retained by Kaolin and GGBS was found to be 18% and 9%, respectively. FT-IR results show that …

Ventilation Rates And Airflow Pathways In Patient Rooms: A Case Study Of Bioaerosol Containment And Removal, Ehsan S. Mousavi, Kevin R. Grosskopf

Durham School of Architectural Engineering and Construction: Faculty Publications

Most studies on the transmission of infectious airborne disease have focused on patient room air changes per hour (ACH) and how ACH provides pathogen dilution and removal. The logical but mostly unproven premise is that greater air change rates reduce the concentration of infectious particles and thus, the probability of airborne disease transmission. Recently, a growing body of research suggests pathways between pathogenic source (patient) and control (exhaust) may be the dominant environmental factor. While increases in airborne disease transmission have been associated with ventilation rates below 2 ACH, comparatively less data are available to quantify the benefits of higher …

Adaptive Predictive Functional Controller, Fadi Alsaleem, Arvind Rao

Durham School of Architectural Engineering and Construction: Faculty Publications

A controller device and a method for controlling a system that utilizes an adaptive mechanism to self-learn the system char acteristics and incorporates this adaptive self-learning ability to predict a control parameter correctly to provide precise control of a system component.

An Adaptive Photovoltaic Topology To Overcome Shading Effect In Pv Systems, Mohamed Amer Chaaban, Lana El Chaar, Mahmoud Alahmad

Durham School of Architectural Engineering and Construction: Faculty Publications

Shading in photovoltaic systems can cause many undesired effects.When shading occurs, the power generated from the PV system is much less than nominal power, increasing the electrical mismatching losses between PV system components. Active research to address this power loss focuses on static and adaptive systems.This paper addresses an adaptive system solution and proposes a new method to adaptively overcome losses due to shading during low radiation conditions. In addition, a statistical analysis for choosing the most feasible and efficient configuration for the system size is presented. The proposed system has been validated under shade conditions in a simulation and …

Building Envelope And Interior Grading Systems And Methods, Fadi Mohammad Alsaleem

Durham School of Architectural Engineering and Construction: Faculty Publications

A difference module determines differences between an out door ambient temperature and an indoor temperature, deter mines a first average of the differences, and determines a second average of the differences. A storing module stores a first data point, the first data point including the first average and a first total run time of a heating, ventilation, and/or air conditioning (HVAC) system, and stores a second data point, the second data point including the second average and a second total run time of the HVAC system. A fitting module fits a line to the first and second data points. An …

A Shear-Based Parameterization Of Turbulent Mixing In The Stable Atmospheric Boundary Layer, Jordan M. Wilson, Subhas K. Venayagamoorthy

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this study, shear-based parameterizations of turbulent mixing in the stable atmospheric boundary layer (SABL) are proposed. A relevant length-scale estimate for the mixing length LM of the turbulent momentum field is constructed from the turbulent kinetic energy Ek and the mean shear rate S as. Using observational data from two field campaigns-the Surface Heat Budget of the Arctic Ocean (SHEBA) experiment and the 1999 Cooperative Atmosphere-Surface Exchange Study (CASES-99)- is shown to have a strong correlation with LM. The relationship between LM and corresponds to the ratio of the magnitude of the tangential components of the turbulent momentum flux …

Hydraulic Design Of Baffles In Disinfection Contact Tanks, Zachary H. Taylor, Jeremy S. Carlston, Subhas Karan Venayagamoorthy

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study focuses on understanding the hydraulic design of baffled contact tanks using computational fluid dynamics simulations. In particular, we address the key question: for a given footprint of a rectangular tank with a specified inlet width (Winlet), how does the hydraulic efficiency of a baffled tank depend on the configuration of internal baffles? In an effort to address this question, a carefully conceived parametric study consisting of 30 high-resolution two-dimensional (planar) simulations was conducted to quantify the hydraulic efficiency of a laboratory scale tank as a function of dimensional relationships between key baffle design dimensions (baffle opening length Lbo, …

Model For Consolidation Analysis Of Layered Soils Under Depth-Dependent Loading, Hefu Pu, Patrick J. Fox

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A numerical model is presented for one-dimensional large strain consolidation of a layered soil stratum. The algorithm accounts for vertical strain, soil self-weight, conventional constitutive relationships, changing material properties during consolidation, unload/reload, time-dependent loading and boundary conditions, an externally applied hydraulic gradient, and multiple soil layers with different material properties. The model can also accommodate depth-dependent loading and variable preconsolidation stress profiles. Verification checks of the model show excellent agreement with available analytical and numerical solutions for consolidation of soils with multiple layers and depth-dependent loading. An overview of this model is presented, and a parametric study is performed to …