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All Journal Prosiding SNTTM Scientific Contributions Oil and Gas
Ahmad Syihan Auzani
Universitas Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Energy Engineering Industrial & Manufacturing Engineering

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CFD2CFD: How computational fluid Dynamics can be a means towards sustainable conscious field dynamics M Hilman Gumelar Syafei; Illa Rizianiza; Ahmad Indra Siswantara; Angga Septiyana; Adi Syuriadi; Muhammad Agung Santoso; Ahmad Syihan Auzani
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/eeff4w73

Abstract

The role of Computational Fluid Dynamics (CFD) across diverse applications has been significantly reinforced by rapid advancements in numerical computation, artificial intelligence, and high-performance computing. Nevertheless, prevailing applications of CFD predominantly operate as simulation tools and technical solutions, often neglecting dimensions of awareness, intentionality, and ethical considerations. This study introduces the CFD2CFD paradigm (Computable Field Dynamics to Conscious Field Dynamics), which is conceptualized within the DAI5 framework—comprising Deep Awareness of I, Intention, Initial Thinking, Idealization, and Instruction Set. In this paradigm, Computable Field Dynamics is defined as the material field that can be mathematically represented and numerically resolved, while Conscious Field Dynamics denotes the immaterial field of awareness. To demonstrate this approach, case studies are conducted on representative material fluid phenomena, namely pipe flow, airfoil aerodynamics, and biomass pyrolysis. The integration of Computable Field Dynamics and Conscious Field Dynamics through the DAI5 framework establishes a novel methodological pathway. The contribution of the CFD2CFD paradigm lies in its provision of a computational approach that extends beyond scientific accuracy to encompass sustainability considerations. More importantly, this paradigm is formulated as an epistemic bridge uniting material and immaterial fields, thereby offering a framework for methods that are simultaneously rigorous in scientific validity and oriented toward sustainability.
Comparative Analysis of B35–B40 Biodiesel Blends in Passenger Train Generator Sets: Performance, Emissions, and 1,200 h Endurance Tests Riva Yudha Abriyant; Naufal Rasendriya Azmi; Irawan Adhi Putra; Faqih Supriyadi; Yogi Pramudito; Dimaz Warahadi; Riesta Anggarani; Eki Dwi Wijanarko; Cahyo Setyo Wibowo; Ahmad Syihan Auzani
Scientific Contributions Oil and Gas Vol 49 No 3 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i3.2129

Abstract

The transition from B35 to B40 biodiesel is a key step in reducing fossil diesel dependence in railway power systems, but its field performance in passenger train generator sets remains insufficiently established. This study evaluates comprehensively the fuel-lubricant quality, engine performance, fuel consumption, NOx emissions, rating component, and filter behaviour of B35 and B40 biodiesel blends in an MTU 10V1600G20F passenger train generator set. Initial tests compared B35 and B40 across different load conditions, followed by a 1,200 h dynamic endurance test using B40 during railway operation. As a results, B40 showed higher cetane number than B35 but lower heating value and higher water content, reflecting the expected trade-off of increasing FAME content. Despite this, B40 delivered power comparable to B35 at higher loads, while fuel consumption remained broadly similar under medium- and high-load operation. After 1,200 h, B40 maintained stable power output and fuel consumption, with no progressive increase in NOx emissions. All measured NOx values remained below the regulatory limit. Lubricant analysis, minor merit rating inspection, and Racor filter monitoring showed no severe oil degradation, abnormal component damage, or visible filter blockage. These findings indicate that B40 can be technically feasible for passenger train generator operation when supported by controlled fuel quality and routine maintenance.
Co-Authors Adi Syuriadi Ahmad Indra Siswantara Angga Septiyana Cahyo Setyo Wibowo Dimaz Warahadi Eki Dwi Wijanarko Faqih Supriyadi Illa Rizianiza Irawan Adhi Putra M Hilman Gumelar Syafei Muhammad Agung Santoso Naufal Rasendriya Azmi Riesta Anggarani Riva Yudha Abriyant Yogi Pramudito