Faculty of Engineering: Recent submissions

Now showing items 461-480 of 552

Trace metal speciation and bioavailability in anaerobic digestion A review

Thanh, P.M.; Ketheesan, B.; Yan, Z.; Stuckey, D. (Elsevier, 2015)

Trace metals are essential for the growth of anaerobic microorganisms, however, in practice they are often added to anaerobic digesters in excessive amounts,which can lead to inhibition. The concept of bioavailability of ...
Fermentative biohydrogen production Evaluation of net energy gain

Perera, K.R.J.; Ketheesan, B.; Gadhamshetty, V.; Nirmalakhandan, N. (Elsevier, 2010)

Most dark fermentation (DF) studies had resorted to above-ambient temperatures to maximize hydrogen yield, without due consideration of the net energy gain. In this study, literature data on fermentative hydrogen production ...
Fermentative biohydrogen production II: Net energy gain from organic wastes

Perera, K.R.J.; Ketheesan, B.; Arudchelvam, Y.; Nirmalakhandan, N. (Elsevier, 2011)

Several reports have demonstrated the feasibility of hydrogen production by dark fermentation (DF). However, most reports had resorted to mesophilic or thermophilic conditions to increase hydrogen yield, overlooking the ...
Feasibility of microalgal cultivation in a pilot-scale airlift-driven raceway reactor

Ketheesan, B.; Nirmalakhandan, N. (Elsevier, 2012)

A Scenedesmus sp. was cultivated in a 23-L airlift-driven raceway reactor under artificial lighting and laboratory conditions, in batch and continuous modes. In batch mode, a maximum volumetric biomass productivity of 0.085 ...
Improving net enAergy gain in fermentative biohydrogen production from glucose

Ketheesan, B.; Nirmalakhandan, N. (Elsevier, 2011)

Our previous studies had demonstrated enhanced fermentative hydrogen production from sucrose in batch reactors with dairy manure as a supplement providing nutrients, buffering, and hydrogen-producing organisms. In this ...
Development of a new airlift-driven raceway reactor for algal cultivation

Ketheesan, B.; Nirmalakhandan, N. (Elsevier, 2010)

This paper presents the development and analysis of a new airlift-driven raceway reactor configuration for energy-efficient algal cultivation. A theoretical analysis of the energy requirements for traditional paddlewheel-driven ...
Bearing capacity of cold-formed unlipped channels with restrained flanges under EOF and IOF load cases

Janarthanan, B.; Mahendran, M.; Gunalan, S. (Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin, 2015)

Bearing failure is a form of localized failure that occurs when thin-walled cold-formed steel sections are subjected to concentrated loads or support reactions. To determine the bearing capacity of cold-formed channel ...
Web crippling behaviour and design of cold-formed steel sections

Janarthanan, B.; Sundararajah, L.; Mahendran, M.; Keerthan, P.; Gunalan, S. (2019)

Cold-formed steel sections are used in many different shapes based on their applications. Recently, a new Csection known as SupaCee was introduced in Australia with higher flexural capacities compared to traditional channel ...
Finite element analyses of cold-formed steel unlipped channel beam with web openings in web crippling

Selvarajasarma, K.; Vithurshan, S.; Janarthanan, B. (2020)

In recent years, the use of Cold-formed steel has increased as an economical replacement to hot-rolled steel sections due to its high strength to weight ratio. However, these sections are vulnerable to bearing failures due ...
Numerical modelling of web crippling failures in cold-formed steel unlipped channel sections

Janarthanan, B.; Mahendran, M.; Gunalan, S. (Elsevier, 2019)

This paper presents a finite element analysis based study of web crippling failures in cold-formed steel unlipped channel sections with their flanges fastened to supports under one-flange load cases (EOF and IOF). Currently no ...
Bearing Capacity Of Cold-Formed Unlipped Channels With Restrained Flanges - Eof And Iof Load Cases

Janarthanan, B.; Gunalan, S.; Mahendran, M. (Nordic Steel Construction Conference 2015, 2015)

The current cold-formed steel specifications (AISI S100, AS/NZS 4600 and Euro-code) do not include any design rules to determine the bearing capacities of unlipped channel sections subjected to one flange loadings when ...
Numerical study of cold-formed steel channel sections under combined web crippling and bending action

Janarthanan, B.; Mahendran, M. (ELSEVIER, 2020)

Cold-formed steel sections used in floor systems are vulnerable to web crippling, and with increasing span lengths, they are likely to fail under combined web crippling and bending action. A numerical study was therefore ...
Rate dependent tensile behavior of polyurethane under varying strain rates

Somarathna, H.M.C.C.; Raman, S.N.; Mohotti, D.; Mutalib, A.A.; Badri, K.H. (ELSEVIER, 2020)

Elastomeric polymers, such as polyurethane (PU), are being used in novel applications to enhance the load-carrying capacity, ductility, and the survivability of structures under dynamic loading. The mechanical response of ...
Hyper-viscoelastic constitutive models for predicting the material behavior of polyurethane under varying strain rates and uniaxial tensile loading

Somarathna, H.M.C.C.; Raman, S.N.; Mohotti, D.; Mutalib, A.A.; Badri, K.H. (ELSEVIER, 2020)

Non-linearity, loading rate, as well as temperature and pressure dependency present major challenges in the investigation of properties, particularly the mechanical properties of elastomeric polymers. Recently, material ...
Alternate management options of small scale surface water resource system to develop ground water system for the improvement in food productivity in Dry Zone of Sri Lanka

Sivakumar, S. (Proceedings of Workshop on Challenges in Groundwater Management in Sri Lanka, 2011)

It is observed that at present the water that is available is not utilized effectively to achieve maximum productivity in terms of food production. Food scarcity is a pressing problem in many countries of the globe. The ...
Policy alternatives of the management of minor and medium irrigation schemes to develop groundwater system in restricted catchments for the improvement in food productivity in the dry zone of Sri Lanka.

Sivakumar, S. (Proceedings of National Conference on Water, Food Security and Climate Change in Sri Lanka, 2009)

Food scarcity is a pressing problem in many countries of the globe. The problem is, however, particularly serious in less developed countries with low agricultural production combined with a fast growing population. To ...
Sustainable Community Project Identification and Selection Based on the Experience Gained from Emergency Northern Recovery Project

Sivakumar, S.; Janen, S. (Proceedings of International Conference on Contemporary Management, 2014)

Sri Lankan Northern and Eastern regions were suffered by civil war form past three decade. After Sri Lankan Government announced the victory against civil war, World Bank initiated to rebuilt the Northern region by the ...
Engineer's Roll in Sustainable Recovery Process of Post (Natural) Disaster’. Proceedings of International Conference on Contemporary Management

Sivakumar, S. (Faculty of Management Study, University of Jaffna Publication, 2014)

This article reveals that the different aspect of sustainable recovery process, where engineers should have played a different and profound professional roll in post tsunami development process. Unfortunately, our beloved ...
Conjunctive Use of Surface and Groundwater to Improve Food Productivity in the Dry Zone Area

Sivakumar, S. (Voice for Change-Journal of Jaffna Managers Forum, 2013)

It is observed that at present the water that is available is not utilized effectively to achieve maximum productivity in terms of food production. Food scarcity is a pressing problem in many countries of the globe. The ...
Water Utility and Management Policy for Effective Sharing of Natural Water Resource in the Costal Dry Zone of Sri Lanka in the North East Region

Sivakumar, S. (ENGINEER, Journal of Institution of Engineers Sri Lanka, 2014)

Unlike other natural resources, water is a unique resource, which renews itself. It is due to its constant circulation in the ocean-atmosphere-earth-ocean system. No matter how much water is consumed in daily life, its ...

Now showing items 461-480 of 552

Search DSpace

Advanced Search

Browse

All of DSpace
This Community

Recently added

Faculty of Engineering: Recent submissions

Search DSpace

Browse

All of DSpace

This Community

My Account