A comparative investigation of thermo-hydraulic performance in a solar air heater roughened with quarter petal shaped ribs Kadhim Al-Chlaihawi, Khaled Al-Farhany, Ammar Abdulkadhim International Journal of Thermal Sciences, 2026 Through a numerical study, the thermo-hydraulic behavior of a solar air heater with quarter petal shaped ribs on its absorber plate is examined including a comparative evaluation of three unique rib configurations. The continuity, momentum (Reynolds-Averaged Navier-Stokes) and energy equations of steady, incompressible, turbulent flow are solved. Renormalization Group (RNG) k -ε turbulence model was chosen to solve the turbulent flow phenomena. The thermal performance has been studied under varying design parameters: relative roughness pitch (7.14 ≤ P/e ≤ 17.86), Reynolds number (4000 ≤ Re ≤ 20,000), while the relative roughness height was kept constant at e/D h = 0.042. The key performance indicators of the SAH performance are measured against the Nusselt number (Nu), the friction factor ( f ), the thermal-hydraulic performance factor (TPF) and observation of critical flow features. Results indicated that the configuration of the quarter petal shaped ribs has a decisive impact on the heat transfer and the friction factor features, and its performance becomes very sensitive to the variation in P/e and Re. With the artificially rough SAH, the optimal configuration achieved a TPF of 2.155, which corresponded to a 115.5 % thermal performance enhancement. Correlations for Nu and f as functions of the Reynolds number and relative roughness pitch were obtained by non-linear regression analysis.
Sustainable Aerodynamics Analysis of Heavy Vehicles: Solution for Drag Reduction Ammar Abdulkadhim, Fatimah AL-Daamee, Mohammed Abdulsada, Azher M. Abed Defect and Diffusion Forum, 2026 Aerodynamics contributed directly on the energy efficiency and fuel consumption reduction of heavy vehicles in addition to its stability. The present study examines numerically the aerodynamics of heavy vehicles considering different drag-reduction devices using SolidWorks programme. Four different drag-reduction devices such as Base flaps, filled boat tail, Deflector and Rear offset plate in order to compare them with the baseline model. the results showed that the reflector contribute in more drag formation while Rear offset plate leads to lower drag.
Hybrid nanofluid mixed convection in a lid-driven wavy cavity with internal heated plate Maathe A. Theeb, Ammar Abdulkadhim, Nasser H. Hamza, Mohamed F. Al-Dawody, Mikhail Sheremet, Wasan J. Kadhem Results in Surfaces and Interfaces, 2025 This study first reports entropy generation caused by mixed convection due to wavy wall movement in a corrugated chamber heated by an internal central inclined plate due to the lateral motion of one of the vertical walls. The corrugated chamber can be used as a heat sink for cooling electronic components, with the inclined plate enhancing airflow and heat dissipation. Using the unique properties of hybrid nanofluids and complex geometries, this configuration is a promising area of research for improving heat transfer in lot of engineering applications. The governing equations were solved numerically, with a wide range of geometrical and operational parameters involved. The number of undulations was 1, 2, 4, and 6, while the dimensionless length of the heated plate was 0.3, 0.5, and 0.7. The working fluid is composed of two types of nanoparticles, with water as the base carrier fluid. The fraction's volume was 0, 0.01, and 0.02. The Richardson number (Ri) was 0.001, 0.1, 10, and 1000. On the other hand, the heated plate's inclination angle ranges from 0 to 90. The results show a rapid growth of total irreversibilities, which is directly proportional to the Reynolds number and inversely proportional to the Richardson number. The increment over the entire range of Reynolds number was 160% without nano-additives and 184% with them. Regarding Nusselt number, the results show increasing Nu with increasing both the number of undulations and the length of the central heated plate and decreasing with increasing Ri. In all considered cases, there was a maximum value of Nu avg that occurred at 45≤γ ≤ 60. The increasing in Nusselt number dimensionless value over the entire range of Reynolds number was 45% without nano-additives and 60% with them.
Numerical investigation of thermo-hydraulic performance in a solar air heater duct with hourglass-shaped turbulence promoters K Al-Chlaihawi, K Al-Farhany, A Abdulkadhim International Communications in Heat and Mass Transfer 175, 111197 , 2026 2026 Citations: 1
Sustainable Aerodynamics Analysis of Heavy Vehicles: Solution for Drag Reduction A Abdulkadhim, F AL-Daamee, M Abdulsada, AM Abed Defect and Diffusion Forum 449, 101-107 , 2026 2026
Comparative study of solar air heater performance roughened with transverse ribs of modified wedge in forward and backward direction: K. Al-Chlaihawi et al. K Al-Chlaihawi, K Al-Farhany, A Abdulkadhim Journal of Thermal Analysis and Calorimetry, 1-31 , 2026 2026
A comparative investigation of thermo-hydraulic performance in a solar air heater roughened with quarter petal shaped ribs K Al-Chlaihawi, K Al-Farhany, A Abdulkadhim International Journal of Thermal Sciences 223, 110580 , 2026 2026 Citations: 3
Numerical Investigation of MHD Double-Diffusive Flow and Entropy Generation in a Corrugated Enclosure with a Star-Shaped Inner Body A Abdulkadhim, K Al-Chlaihawi, F Al-Daamee, HK Hamzah International Communications in Heat and Mass Transfer 169, 109853 , 2025 2025
Entropy generation in nano-porous enclosure for solar concentrating thermal system RN Al-Kaby, A Abdulkadhim, HK Hamzah, FH Ali, QR Al-amir Journal of the Taiwan Institute of Chemical Engineers 175, 106294 , 2025 2025
Insight view on the CFD simulation of magneto-hydrodynamics natural convection in wavy enclosure with trapezoidal heater and circular cylinder A Abdulkadhim, IM Abed, NM Said Waves in Random and Complex Media 35 (5), 9809-9834 , 2025 2025 Citations: 6
Numerical simulation on magnetohydrodynamics convection in annulus inclined elliptical enclosure A Abdulkadhim, AS Al-Shati, NH Hamza, M Abdulsada, AM Abed, ... Australian Journal of Mechanical Engineering 23 (3), 509-526 , 2025 2025 Citations: 1
Magnetohydrodynamics double-diffusive natural convection and entropy generation in novel E-shaped enclosure A Abdulkadhim, NH Hamza, HK Hamzah, AM Abed, FH Ali International Communications in Heat and Mass Transfer 164, 108873 , 2025 2025 Citations: 8
Hybrid nanofluid mixed convection in a lid-driven wavy cavity with internal heated plate MA Theeb, A Abdulkadhim, NH Hamza, MF Al-Dawody, M Sheremet, ... Results in Surfaces and Interfaces 18, 100469 , 2025 2025 Citations: 8
MHD natural convection in a wavy nanofluid enclosure with an internally corrugated porous cylinder N Abid Allah H, F Sh. Alnasur, A Abdulkadhim, I Mejbel Abed, ... Journal of Taibah University for Science 18 (1), 2335685 , 2024 2024 Citations: 9
Numerical simulation on thermohydraulic performance of different types of nanofluids in a corrugated-triangular channel AM Abed, A Abdulkadhim, HA Mohammed, HK Hamzah, HA Farooq, ... Journal of Taibah University for Science 18 (1), 2306671 , 2024 2024 Citations: 6
Magnetic field effects on double-diffusive mixed convection and entropy generation in a cam-shaped enclosure MF Al-Dawody, AM Hassan, A Abdulkadhim, NH Hamza, M Al-Dossari, ... International Communications in Heat and Mass Transfer 159, 108166 , 2024 2024 Citations: 26
Magnetohydrodynamics hybrid nanofluid in H-wavy enclosure: natural convection and entropy generation A Abdulkadhim, AM Hassan, AM Abed, IM Abed, NM Said Journal of Thermal Analysis and Calorimetry 149 (22), 13233-13253 , 2024 2024 Citations: 20
Effects of mixing tallow methyl ester with diesel fuel on the thermal characteristics of diesel engine MF Al-Dawody, DF Maki, W Al-Obaidi, ED Aboud, K Al-Farhany, ... Energy Conversion and Management: X 24, 100804 , 2024 2024 Citations: 8
Inhomogeneous flow model of natural convection, entropy generation, and heatlines visualization in wavy I‐shaped enclosure with rectangular heater A Abdulkadhim, AM Abed, HK Hamzah, IM Abed, NS Mahjoub, FH Ali Heat Transfer 53 (4), 1989-2009 , 2024 2024 Citations: 1
Linear stability analysis of nanofluid flow over static or moving wedge using the collocation spectral method A Laouer, F Alqurashi, M Teggar, K Al-Farhany, SE Ahmed, ... Journal of Engineering Research 12 (1), 281-288 , 2024 2024 Citations: 5
Analysis of double‐diffusive hydrothermal flow in a domestic stack: The effect of side walls patterns NH Hamza, A Abdulkadhim, AM Mohsen, AM Abed Heat Transfer 53 (2), 707-732 , 2024 2024 Citations: 14
Magnetohydrodynamics natural convection and entropy generation in a hybrid nanofluid complex enclosure considering finned-heater A Abdulkadhim, HK Hamzah, NH Hamza, K Al-Farhany, FH Ali, IM Abed, ... Journal of Thermal Analysis and Calorimetry 149 (4), 1535-1563 , 2024 2024 Citations: 10
Transient conditions effects on electromagnetic Casson fluid flow via stretching surface: system thermal case elaboration TP Kumar, G Dharmaiah, K AL-Farhany, A Abdulkadhim, ... Numerical Heat Transfer, Part B: Fundamentals 84 (5), 539-555 , 2023 2023 Citations: 28
MOST CITED SCHOLAR PUBLICATIONS
Effect of heat generation and heat absorption on natural convection of Cu-water nanofluid in a wavy enclosure under magnetic field A Abdulkadhim, HK Hamzah, FH Ali, Ç Yıldız, AM Abed, EM Abed, M Arıcı International Communications in Heat and Mass Transfer 120, 105024 , 2021 2021 Citations: 96
MHD effects on natural convection in a U-shaped enclosure filled with nanofluid-saturated porous media with two baffles K Al-Farhany, A Abdulkadhim, HK Hamzah, FH Ali, A Chamkha Progress in Nuclear Energy 145, 104136 , 2022 2022 Citations: 87
Natural convection among inner corrugated cylinders inside wavy enclosure filled with nanofluid superposed in porous–nanofluid layers A Abdulkadhim, HK Hamzah, FH Ali, AM Abed, IM Abed International Communications in Heat and Mass Transfer 109, 104350 , 2019 2019 Citations: 85
Numerical analysis of flow and heat transfer enhancement in a horizontal pipe with P-TT and V-Cut twisted tape AM Abed, HS Majdi, Z Hussein, D Fadhil, A Abdulkadhim Case Studies in Thermal Engineering , 2018 2018 Citations: 71
Review of natural convection within various shapes of enclosures A Abdulkadhim, IM Abed, N Mahjoub Said Arabian Journal for Science and Engineering 46 (12), 11543-11586 , 2021 2021 Citations: 54
Numerical study of mixed convection nanofluid in an annulus enclosure between outer rotating cylinder and inner corrugation cylinder FH Ali, HK Hamzah, A Abdulkadhim Heat Transfer—Asian Research 48 (1), 343-360 , 2019 2019 Citations: 43
An exhaustive review on natural convection within complex enclosures: influence of various parameters A Abdulkadhim, I mejbel Abed, N mahjoub Said Chinese Journal of Physics 74, 365-388 , 2021 2021 Citations: 41
Numerical investigation of conjugate natural convection heat transfer in a square porous cavity heated partially from left sidewall K Al-Farhany, A Abdulkadhim International journal of heat and technology 36 (1), 237-244 , 2018 2018 Citations: 35
Natural Convection Heat Transfer for Adiabatic Circular Cylinder Inside Trapezoidal Enclosure Filled with Nanofluid Superposed Porous–Nanofluid Layer A Esam M, A Abdulkadhim, RA Hamzah, HK Hamzah, FH Ali FME Transactions 48 (1), 83 , 2020 2020 Citations: 34
Effect of partially thermally active wall on natural convection in porous enclosure A Abdulkadhim, AM Abed, AM Mohsen, K Al-Farhany Journal homepage: http://iieta. org/Journals/MMEP 5 (4), 395-406 , 2018 2018 Citations: 34
COMPUTATIONAL INVESTIGATION OF CONJUGATE HEAT TRANSFER IN CAVITY FILLED WITH SATURATED POROUS MEDIA A Abdulkadhim, AM Abed, K Al-Farhany Frontiers in Heat and Mass Transfer , 2018 2018 Citations: 29
Transient conditions effects on electromagnetic Casson fluid flow via stretching surface: system thermal case elaboration TP Kumar, G Dharmaiah, K AL-Farhany, A Abdulkadhim, ... Numerical Heat Transfer, Part B: Fundamentals 84 (5), 539-555 , 2023 2023 Citations: 28
NUMERICAL INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER IN A PARALLELOGRAMIC ENCLOSURE HAVING AN INNER CIRCULAR CYLINDER USING LIQUID NANOFLUID HS Majdi, A Abdulkadhim, AM Abed Frontiers in Heat and Mass Transfer 12 , 2019 2019 Citations: 27
Magnetic field effects on double-diffusive mixed convection and entropy generation in a cam-shaped enclosure MF Al-Dawody, AM Hassan, A Abdulkadhim, NH Hamza, M Al-Dossari, ... International Communications in Heat and Mass Transfer 159, 108166 , 2024 2024 Citations: 26
The influence of magnetic field on entropy generation in a wavy cavity equipped with internal heated plate using Darcy–Brinkman–Forchheimer model NH Hamza, NM Abdulrazzaq, MA Theeb, M Sheremet, A Abdulkadhim International Journal of Thermofluids 20, 100463 , 2023 2023 Citations: 25
Effect of adiabatic circular cylinder on the natural convection heat transfer characterizes in a porous enclosure A Abdulkadhima, K Al-Farhanyb, AM Abeda Chem Eng 71, 1309-1314 , 2018 2018 Citations: 21
Magnetohydrodynamics hybrid nanofluid in H-wavy enclosure: natural convection and entropy generation A Abdulkadhim, AM Hassan, AM Abed, IM Abed, NM Said Journal of Thermal Analysis and Calorimetry 149 (22), 13233-13253 , 2024 2024 Citations: 20
Mixed convection within trapezoidal-wavy enclosure filled with nano-encapsulated phase change material: effect of magnetohydrodynamics and wall waviness NAA Qasem, A Abderrahmane, Y Khetib, M Rawa, A Abdulkadhim, ... Case Studies in Thermal Engineering 42, 102726 , 2023 2023 Citations: 20
Natural convection investigation under influence of internal bodies within a nanofluid-filled square cavity AD Abdulsahib, AS Hashim, K Al-Farhany, A Abdulkadhim, ... The European Physical Journal Special Topics 231 (13), 2605-2621 , 2022 2022 Citations: 19
Magnetohydrodynamics thermogravitational convective in a novel I-shaped wavy-walled enclosure considering various inner hot pipe locations A Abdulkadhim, IM Abed, NM Said Journal of Thermal Analysis and Calorimetry 147 (14), 7961-7990 , 2022 2022 Citations: 19