Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.2
2.0
Journals
Entropy
Special Issues
Advances in Entropy and Computational Fluid Dynamics, 2nd Edition
entropy-logo
Submit to Special Issue Submit Abstract to Special Issue Review for Entropy Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Advances in Entropy and Computational Fluid Dynamics, 2nd Edition

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Thermodynamics".

Deadline for manuscript submissions: 15 May 2026 | Viewed by 2208

Special Issue Editors

Dr. Jorge Arturo Alfaro-Ayala

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of Guanajuato, Guanajuato 36050, Mexico
Interests: fluid dynamics; heat transfer; fluid mechanics; applied thermodynamics; heat exchangers; CFD simulation
Special Issues, Collections and Topics in MDPI journals
Dr. José de Jesús Ramírez-Minguela

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of Guanajuato, Guanajuato 36050, Mexico
Interests: fluid dynamics; heat transfer; entropy; fuel cells; CFD simulation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nowadays, computational fluid dynamics (CFD) has taken on great relevance in the study, design, and optimization of equipment, which is due to its great ability to simulate and model transport phenomena. CFD and the second law of thermodynamics help us to understand the phenomena involved in different kinds of devices, such as fuel cells, turbines, and solar collectors, among others. Several studies have demonstrated the use of CFD and the second law of thermodynamics to improve industrial equipment, and CFD is even used in the field of science, such as in medicine to predict diseases. In other words, CFD is used to create virtual environments to help us improve our understanding of the real world.

This Special Issue, “Advances in Entropy and Computational Fluid Dynamics, 2nd Edition”, will showcase unpublished original papers focused on the analysis of irreversibility by computational fluid dynamics.

Dr. Jorge Arturo Alfaro-Ayala
Dr. José de Jesús Ramírez-Minguela
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Entropy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • entropy and CFD in laminar and turbulent flows
  • entropy generation rate by fluid flow and heat/mass transfer processes
  • entropy generation rate in multiphase flows
  • entropy generation rate in chemically reactive flows
  • optimization with the second law of thermodynamics and CFD
  • entropy generation rate in biological and physiological flows
  • entropy generation rate in nano- and micro-fluid flows
  • entropy and CFD in thermal equipment, such as fuel cells, solar collectors, heat exchangers, combustors, ovens, refrigeration cabins, etc.
  • entropy and CFD in devices used to generate energy, such as horizontal/vertical wind turbines, gas/vapor turbines, etc.
  • entropy and CFD in other equipment, such as compressors, blowers, stirred tanks, etc.
  • entropy and CFD in biological tissues, such as aorta, veins, heart, etc.

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

Further information on MDPI's Special Issue policies can be found here.

Related Special Issue

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

17 pages, 3357 KB  
Article
Numerical Study of Entropy Production in a Fluidic Oscillator
by José Omar Dávalos, Delfino Cornejo-Monroy, Alfredo Villanueva-Montellano, Diana Ortiz-Muñoz and David Luviano-Cruz
Entropy 2026, 28(4), 437; https://doi.org/10.3390/e28040437 - 13 Apr 2026
Viewed by 238
Abstract
A numerical study was conducted to quantify the entropy generation in a fluidic oscillator operating at Reynolds numbers of 30,000, 40,000, and 50,000. Both the local entropy production rate and total entropy were calculated under these operating conditions. Transient computational fluid dynamics (CFD) [...] Read more.
A numerical study was conducted to quantify the entropy generation in a fluidic oscillator operating at Reynolds numbers of 30,000, 40,000, and 50,000. Both the local entropy production rate and total entropy were calculated under these operating conditions. Transient computational fluid dynamics (CFD) simulations were carried out using the k−ω shear stress transport (SST) turbulence model. The total entropy was compared with the pressure and driving-force coefficients to establish its relationship with force dynamics. The total entropy showed a periodic evolution synchronized with the jet switching process, while its amplitude increased with Reynolds number and showed a slight phase delay. The pressure and driving-force coefficients exhibited weak fluctuations at the end and beginning of each oscillation period, matching the secondary peaks in total entropy and indicating that these variations arise from residual dissipative effects linked to the jet reattachment stages. The local entropy production rate was concentrated near the feedback channels, Coanda surfaces, and the interaction zone where the jet from the inlet nozzle met the returning flow from the feedback channels. Regions of elevated entropy were detected at the outlet corners due to expansion and pressure drop. The high-velocity jet core exhibited minimal entropy, which increased toward the flanks as the flow decelerated. The results show that entropy generation follows the jet switching motion, reflecting the variations in viscous dissipation and flow dynamics inside the oscillator. Full article
(This article belongs to the Special Issue Advances in Entropy and Computational Fluid Dynamics, 2nd Edition)
►▼ Show Figures

Figure 1

30 pages, 12256 KB  
Article
Entropy Production Analysis and Fluid–Structure Refinement of a Stepless Stratified Intake
by Jiahuan Qi, Ke Liu, Xingen Wang, Jianping Zhao and Jun Li
Entropy 2026, 28(3), 256; https://doi.org/10.3390/e28030256 - 26 Feb 2026
Viewed by 351
Abstract
Thermal stratification in deep reservoirs can cause ecologically problematic cold-water releases, and many existing selective-withdrawal phenomena rely on a limited set of fixed intake levels, which constrains their ability to follow seasonal shifts in the thermocline. Stepless stratified intakes with continuously adjustable flap [...] Read more.
Thermal stratification in deep reservoirs can cause ecologically problematic cold-water releases, and many existing selective-withdrawal phenomena rely on a limited set of fixed intake levels, which constrains their ability to follow seasonal shifts in the thermocline. Stepless stratified intakes with continuously adjustable flap gates offer quasi-continuous control of withdrawal depth, but their multi-gate, multi-brace layouts generate complex internal hydraulics whose energy-loss mechanisms are not well captured by conventional head-loss and resistance-coefficient metrics. In this study, physical-model measurements are combined with a validated three-dimensional numerical model, and entropy-production theory is used as a diagnostic to resolve where and by which mechanisms mechanical energy is irreversibly degraded inside a single-unit stepless stratified intake. The analysis shows that turbulent entropy production accounts for more than 98% of total dissipation, concentrated mainly in the flow channel and gate shaft, while the reservoir and outlet pipe contribute only weakly. Local entropy-production-rate fields indicate that dominant irreversibilities are associated with flow turning at the active gate leaves and with separation and wake development around horizontal and vertical braces, which generate low-velocity bands across gate levels and a low-velocity corridor in the shaft. Five geometric modification schemes targeting gate-entrance shaping and brace layout are evaluated; a combined brace-alignment and edge-rounding configuration most effectively weakens dissipation hotspots, improves discharge sharing among gate levels and reduces total entropy production. These findings show that entropy-based diagnostics can complement traditional hydraulic indicators and provide effective guidance for the design and refinement of stepless stratified intake structures. Full article
(This article belongs to the Special Issue Advances in Entropy and Computational Fluid Dynamics, 2nd Edition)
►▼ Show Figures

Figure 1

22 pages, 4523 KB  
Article
Entropy Generation Analysis and Performance Comparison of a Solid Oxide Fuel Cell with an Embedded Porous Pipe Inside of a Mono-Block-Layer-Build Geometry and a Planar Geometry with Trapezoidal Baffles
by J. J. Ramírez-Minguela, J. M. Mendoza-Miranda, V. Pérez-García, J. L. Rodríguez-Muñoz, Z. Gamiño-Arroyo, J. A. Alfaro-Ayala, S. Alonso-Romero and T. Pérez-Segura
Entropy 2025, 27(7), 659; https://doi.org/10.3390/e27070659 - 20 Jun 2025
Viewed by 1118
Abstract
An analysis of entropy generation and a performance comparison are carried out for a solid oxide fuel cell with an embedded porous pipe in the air supply channel of a mono-block-layer-build geometry (MOLB-PPA SOFC) and a planar geometry with trapezoidal baffles inside the [...] Read more.
An analysis of entropy generation and a performance comparison are carried out for a solid oxide fuel cell with an embedded porous pipe in the air supply channel of a mono-block-layer-build geometry (MOLB-PPA SOFC) and a planar geometry with trapezoidal baffles inside the fuel and air channels (P-TBFA SOFC). The results for power density at different current densities are discussed. Also, a comparison of the field of species concentration, temperature, and current density on the electrode–electrolyte interface is analyzed at a defined power density. Finally, a comparison of maps of the local entropy generation rate and the global entropy generation due to heat transfer, fluid flow, mass transfer, activation loss, and ohmic loss are studied. The results show that the MOLB-PPA SOFC reaches a 7.5% higher power density than the P-TBFA SOFC. Furthermore, the P-TBFA SOFC has a more homogeneous temperature distribution than the MOLB-type SOFC. The entropy generation analysis indicates that the MOLB-PPA SOFC exhibits lower global entropy generation due to heat transfer compared to the P-TBFA SOFC. The entropy generation due to ohmic losses is predominant for both geometries. Finally, the total irreversibilities are 24.75% higher in the P-TBFA SOFC than in the MOLB-PPA SOFC. Full article
(This article belongs to the Special Issue Advances in Entropy and Computational Fluid Dynamics, 2nd Edition)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop