Direct Simulation Model of Concentrated Particulate Flow in Pressure-Driven Dead-End Microfiltration

Regenerative machining chatter or resonance in the machining process has traditionally been modeled with the stability lobe approach. This paper presents a new time based direct simulation model and compares it with traditional stability lobe modeling. The direct model has the ability to discriminate directional and time information, resulting in a number of advantages over frequency-based stability lobe analysis.

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Direct Simulation of the CoVid-19 epidemic

10.1101/2021.01.14.21249829 ◽

2021 ◽

Author(s):

Augusto Cabrera-Becerril ◽

Pedro Miramontes ◽

Raúl Peralta

Keyword(s):

Simulation Model ◽

Computational Models ◽

Human Mobility ◽

High Peak ◽

Direct Simulation ◽

Agent Based Model ◽

Agent Based

AbstractWe introduce an agent-based model to simulate the epidemiological dynamics of COVID-19. Most computational models proposed to study this epidemic do no take into account human mobility. We present a direct simulation model where mobility plays a key role and propose as well four quarantine strategies. The results show that the no-quarantine strategy does lead to a high peak of contagions with no rebound. Quarantined strategies, for their part, show a re-emergence of the epidemic with smaller and softer peaks.

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The application feasibility of graphene oxide membranes for pressure-driven desalination in a dead-end flow system

Desalination ◽

10.1016/j.desal.2019.114271 ◽

2020 ◽

Vol 477 ◽

pp. 114271 ◽

Cited By ~ 1

Author(s):

Ruirui Hu ◽

Guoke Zhao ◽

Yijia He ◽

Hongwei Zhu

Keyword(s):

Graphene Oxide ◽

Flow System ◽

Dead End ◽

Oxide Membranes ◽

Graphene Oxide Membranes ◽

Pressure Driven

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Virus removal by ceramic membrane microfiltration with coagulation pretreatment

Water Science & Technology Water Supply ◽

10.2166/ws.2003.0154 ◽

2003 ◽

Vol 3 (5-6) ◽

pp. 93-99 ◽

Cited By ~ 6

Author(s):

Y. Matsui ◽

T. Matsushita ◽

T. Inoue ◽

M. Yamamoto ◽

Y. Hayashi ◽

...

Keyword(s):

High Performance ◽

Ceramic Membrane ◽

Membrane Surface ◽

Membrane System ◽

Positive Pressure ◽

Virus Inactivation ◽

Virus Removal ◽

Virus Adsorption ◽

Dead End ◽

Pressure Driven

The performance and mechanism of virus removal by microfiltration with coagulation pretreatment were investigated. We confirmed the unexpectedly high performance of virus removal for two types of ceramic membrane system: a positive pressure-driven dead-end filtration with inside-out configuration and a vacuum pressure-driven dead-end immersed filtration with outside-in configuration. Virus removals by both systems were more than 7 logs, although the size of the tested Qβ virus (23 nm) was much smaller than the membrane nominal pore size of 100 nm. The virus inactivation by the addition of the coagulant (PACl) and the virus adsorption onto the floc retained on the membrane surface mainly contributed the virus removal. No virus accumulation in the retentate was observed, possibly due to the virus inactivation by the coagulant.

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