Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

All Stories

1. 
   Effect of varying passive interrupted geometrical techniques to implement novel parametric assessment of improving thermal-hydraulic performance in 3D pipe

   Article • Applied Thermal Engineering, August 2025, Elsevier

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

2. 
   Evaluation the low cost of vibration and acoustics techniques based on novel cavitation detecting in axial pumps by varying load conditions and statistical method

   Article • Scientific Reports, July 2025, Springer Science + Business Media

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

3. 
   Investigation of hydraulic transient flow and dynamic response performance of axial pump based on novel vibration signals characteristics and numerical analyses

   Article • Alexandria Engineering Journal, June 2025, Elsevier

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

4. 
   Experimental novel investigation of diagnostics cavitation in axial pump using vibration and acoustic measurements based on CWT and FFT analyses approaches

   Article • Applied Acoustics, June 2025, Elsevier

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

5. 
   Evaluation of Internal Thermal Flow and Heat Performance Augmentation Based on Novel Various Dimple With Insert Twisted Tape Configurations

   Article • Heat Transfer, May 2025, Wiley

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

6. 
   Hydrothermal Performance Enhancement of Minichannel Heat Sink With Inline and Staggered Arrangements of Straight and Wavy Fins

   Article • Heat Transfer, May 2025, Wiley

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

7. 
   Extensive Investigation of Hydrothermal Flow and Heat Performance Improvement in a 3D Tube Based on Varying Concavity Dimple and Corrugation Turbulator Configurations

   Article • Heat Transfer, April 2025, Wiley

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

8. 
   Numerical investigation on effect of various pump rotational speeds on performance of centrifugal pump based on CFD analysis technique

   Article • March 2025, World Scientific Pub Co Pte Lt

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

9. 
   Analyses of the transient turbulence flow in a 3D impeller axial pump using Novel vibration signals and Inner dynamic simulation techniques

   Article • Flow Measurement and Instrumentation, March 2025, Elsevier

   Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

10. 
    Assessment Improvement of Heat Performance and Hydraulic Thermal Flow in a Three‐Dimensional Tube Equipped With Different Turbulator Corrugated Arrangements

    Article • Heat Transfer, February 2025, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

11. 
    Comparative Investigation of Novel Thermo‐Hydraulic Flow Characteristics and Augmentation of Heat Efficiency in 3D Pipes Based on Parametrical Corrugated Shape Configurations

    Article • Heat Transfer, January 2025, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

12. 
    Experimental Investigation to Utilize Low-cost Sensors of Early Cavitation Prediction in Axial Pump Based on Acoustic and Vibration Approaches

    Article • Journal of Applied Fluid Mechanics, January 2025, Academic World Research

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

13. 
    Improvement of thermohydraulic performance of flow based on novel dimpled tubes on response surface methodology and Taguchi technique-fitted experiment design

    Article • International Journal of Thermofluids, January 2025, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

14. 
    Thermo-hydraulics flow investigation and heat performance augmentation evaluation in 3d tube based on novel corrugated, varying insert tape and dimple configurations

    Article • Heat and Mass Transfer, January 2025, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

15. 
    A numerical investigation on the characteristic of flow and enhancement of heat transfer in a 3D pipe, with various dimple parameter configuration

    Article • January 2025, American Institute of Physics

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

16. 
    Thermal hydraulic flow investigation and thermal performance enhancement of 3D corrugated tubes based on various geometries and DoE analyses

    Article • International Journal on Interactive Design and Manufacturing (IJIDeM), December 2024, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

17. 
    Analysis of Hydrothermal Flow and Performance of Heat Transfer in 3D Pipes Based on Varying Dimple Structure Configurations

    Article • Heat Transfer, December 2024, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

18. 
    Analysis of thermal hydraulic flow and heat transfer augmentation in dimpled tubes based on experimental and CFD investigations

    Article • International Journal of Heat and Fluid Flow, December 2024, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

19. 
    Investigation of the hydraulic performance heat improvement in 3D pipe by variable of novel twisted tape configurations based on CFD and DoE analysis methods

    Article • International Journal of Heat and Fluid Flow, December 2024, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

20. 
    Experimental and numerical the effect of cavitation detection on hydraulic performance of the centrifugal pump based on different geometrical configurations

    Article • Journal of Engineering Research, November 2024, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

21. 
    Analysis of unsteady internal flow characteristics in axial pump with varying number of blades using computational modelling and vibration techniques

    Article • Flow Measurement and Instrumentation, October 2024, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

22. 
    Evaluation of hydraulic thermal flow and heat performance augmentation in a 3D tube fitted with varying concavity dimple turbulator configurations

    Article • Heat Transfer, September 2024, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

23. 
    Dynamics simulation in corrugated pipe-based investigations of internal thermo-hydraulic flow and improvement of heat performance under various corrugated geometrical configurations

    Article • Journal of Thermal Analysis and Calorimetry, July 2024, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

24. 
    Unsteady behaviour and plane blade angle configurations' effects on pressure fluctuations and internal flow analysis in axial flow pumps

    Article • Alexandria Engineering Journal, July 2024, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

25. 
    Analysis of thermohydraulic flow and enhancement heat performance in 3D dimple tube based on varying geometrical configurations

    Article • Heat Transfer, May 2024, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

26. 
    Investigation evaluation of thermo-hydraulic flow and heat improvement in a 3D circular corrugated pipe based on response surface method and Taguchi analyses

    Article • Heat and Mass Transfer, February 2024, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

27. 
    Characterization of Internal Thermo-Hydraulic Flow and Heat Transfer Improvement in a Three-Dimensional Circular Corrugated Tube Surfaces Based on Numerical Simulation and Design of Experiment

    Article • January 2024, Authorea, Inc.

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

28. 
    Influence of different geometrical dimple configurations on flow behaviour and thermal performance within a 3D circular pipe

    Article • Journal of Thermal Engineering, January 2024, Journal of Thermal Engineering

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

29. 
    Evaluation and Investigation of Hydraulic Performance Characteristics in an Axial Pump Based on CFD and Acoustic Analysis

    Article • Processes, January 2024, MDPI AG

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

30. 
    Experimental Comparative Investigations to Evaluate Cavitation Conditions within a Centrifugal Pump Based on Vibration and Acoustic Analyses Techniques

    Article • Archive of Mechanical Engineering, May 2023, Polish Academy of Sciences Chancellery

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

31. 
    Experimental Investigation of the Effect of Suction Valve Opening on the Performance and Detection of Cavitation in the Centrifugal Pump Based on Acoustic Analysis Technique

    Article • Archive of Mechanical Engineering, May 2023, Polish Academy of Sciences Chancellery

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

32. 
    Experimental Diagnostic of Cavitation Flow in the Centrifugal Pump Under Various Impeller Speeds Based on Acoustic Analysis Method

    Article • Archive of Mechanical Engineering, May 2023, Polish Academy of Sciences Chancellery

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

33. 
    Effect of Different Guide Vane Configurations on Flow Field Investigation and Performances of an Axial Pump Based on CFD Analysis and Vibration Investigation

    Article • Experimental Techniques, April 2023, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

34. 
    The influence of different twisted tape inserts configurations on thermo-hydraulic performance and enhancement of heat transfer in the 3D circular tube

    Article • Korean Journal of Chemical Engineering, March 2023, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

35. 
    Evaluation of thermal hydraulic flow and enhancement of heat performance in different 3D dimpled tube configurations according to design of experiment analysis

    Article • Energy Sources Part A Recovery Utilization and Environmental Effects, February 2023, Taylor & Francis

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

36. 
    Investigation of the Main Flow Characteristics Mechanism and Flow Dynamics Within an Axial Flow Pump Based on Different Transient Load Conditions

    Article • Iranian Journal of Science and Technology Transactions of Mechanical Engineering, January 2023, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

37. 
    Investigation of thermo-hydraulic characteristics of water flow in a circular tube with different shapes of spiral insert

    Article • January 2023, American Institute of Physics

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi, basim Freegah

38. 
    Investigation of the Influence of Varying Operation Configurations on Flow Behaviors Characteristics and Hydraulic Axial-Flow Pump Performance

    Article • January 2023, Institute for Computer Sciences, Social Informatics and Telecommunications Engineering (ICST)

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

39. 
    Investigation on the Characteristics of Internal Flow within Three-Dimensional Axial Pump Based on Different Flow Conditions

    Article • January 2023, Institute for Computer Sciences, Social Informatics and Telecommunications Engineering (ICST)

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

40. 
    Thermal flow and heat performance analyses in circular pipe using different twisted tape parameters based on design of experiments

    Article • Heat Transfer, June 2022, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

41. 
    The Effect of Different Twisted Tape Inserts Configurations on Fluid Flow Characteristics, Pressure Drop, Thermo-hydraulic Performance and Heat Transfer Enhancement in the 3D Circular Tube

    Article • International Journal of Ambient Energy, June 2022, Taylor & Francis

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

42. 
    Investigation of the effect of various corrugated pipe configurations on thermo-hydraulic flow and enhancement of heat transfer performance with the development of different correlations

    Article • International Journal of Thermal Sciences, June 2022, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

43. 
    Effect of different corrugation interruptions Parameters on thermohydrodynamic characteristics and heat transfer performance of 3D Three-dimensional corrugated tube

    Article • Case Studies in Thermal Engineering, April 2022, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

44. 
    Characterization of internal thermohydraulic flow and heat transfer improvement in a three‐dimensional circular corrugated tube surfaces based on numerical simulation and design of experiment

    Article • Heat Transfer, March 2022, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

45. 
    Effect of outlet impeller diameter on performance prediction of centrifugal pump under single-phase and cavitation flow conditions

    Article • International Journal of Nonlinear Sciences and Numerical Simulation, January 2022, De Gruyter

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

46. 
    Investigation on effects of varying geometrical configurations on thermal hydraulics flow in a 3D corrugated pipe

    Article • International Journal of Thermal Sciences, January 2022, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

47. 
    A numerical study to investigate the effect of turbulators on thermal flow and heat performance of a 3D pipe

    Article • Heat Transfer, December 2021, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

48. 
    Investigation of thermal flow structure and performance heat transfer in three‐dimensional circular pipe using twisted tape based on Taguchi method analysis

    Article • Heat Transfer, November 2021, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

49. 
    Analysis on flow structure and improvement of heat transfer in 3D circular tube with varying axial groove turbulator configurations

    Article • Heat Transfer, July 2021, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

50. 
    Flow Field Structure, Characteristics of Thermo-Hydraulic and Heat Transfer Performance Analysis in a Three Dimensions Circular Tube with Different Ball Turbulators Configurations

    Article • Arabian Journal for Science and Engineering, July 2021, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

51. 
    Investigation of flow pattern, thermohydraulic performance and heat transfer improvement in 3D corrugated circular pipe under varying structure configuration parameters with development different correlations

    Article • International Communications in Heat and Mass Transfer, July 2021, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

52. 
    Flow felid and heat transfer enhancement investigations by using a combination of corrugated tubes with a twisted tape within 3D circular tube based on different dimple configurations

    Article • Heat Transfer, June 2021, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

53. 
    Numerical investigation on effect of various pump rotational speeds on performance of centrifugal pump based on CFD analysis technique

    Article • International Journal of Modeling Simulation and Scientific Computing, June 2021, World Scientific Pub Co Pte Lt

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

54. 
    The effect of interruptions on thermal characteristics of corrugated tube

    Article • Case Studies in Thermal Engineering, June 2021, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

55. 
    Study of the flow characteristics, pressure drop and augmentation of heat performance in a horizontal pipe with and without twisted tape inserts

    Article • Case Studies in Thermal Engineering, June 2021, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

56. 
    Influence of Various Types of Twisted Tape inserts on Hydrody-namic, Pressure Drop and Thermal Heat Performance in Heat Ex-changers: A Review Study

    Article • Anbar Journal for Engineering Sciences, May 2021, Al-Anbar Journal of Agricultural Sciences

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

57. 
    Investigation of the flow, pressure drop characteristics, and augmentation of heat performance in a 3D flow pipe based on different inserts of twisted tape configurations

    Article • Heat Transfer, March 2021, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

58. 
    COMPARISON STUDY BETWEEN THEORETICAL ANALYSIS AND ARTIFICIAL NEURAL NETWORK OF THE CAPILLARY TUBE

    Article • Journal of Thermal Engineering, March 2021, Journal of Thermal Engineering

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

59. 
    Flow Pattern Investigation and Thermohydraulic Performance Enhancement in Three-Dimensional Circular Pipe under Varying Corrugation Configurations

    Article • Journal of Physics Conference Series, March 2021, Institute of Physics Publishing

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

60. 
    Effect of Concavity Configuration Parameters on Hydrodynamic and Thermal Performance in 3D Circular Pipe using Al2O3 Nanofluid Based on CFD Simulation

    Article • Journal of Physics Conference Series, March 2021, Institute of Physics Publishing

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

61. 
    Study the influence of concavity shapes on augmentation of heat‐transfer performance, pressure field, and fluid pattern in three‐dimensional pipe

    Article • Heat Transfer, February 2021, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

62. 
    Numerical Investigation of Fluid Flow, Characteristics of Thermal Performance and Enhancement of Heat Transfer of Corrugated Pipes with Various Configurations

    Article • Journal of Physics Conference Series, January 2021, Institute of Physics Publishing

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

63. 
    Analysis of the Effect of Various Impeller Blade Angles on Characteristic of the Axial Pump with Pressure Fluctuations Based on Time- and Frequency-Domain Investigations

    Article • Iranian Journal of Science and Technology Transactions of Mechanical Engineering, September 2020, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

64. 
    Analysis of the flow field, thermal performance, and heat transfer augmentation in circular tube using different dimple geometrical configurations with internal twisted‐tape insert

    Article • Heat Transfer, June 2020, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

65. 
    Influence of guide vanes on the flow fields and performance of axial pump under unsteady flow conditions: Numerical study

    Article • JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES, June 2020, Universiti Malaysia Pahang Publisher

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

66. 
    Experimental Investigation of the Effect of Air Injection on Performance and Detection of Cavitation in the Centrifugal Pump Based on Vibration Technique

    Article • Arabian Journal for Science and Engineering, April 2020, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

67. 
    Investigation of the influence of various numbers of impeller blades on internal flow field analysis and the pressure pulsation of an axial pump based on transient flow behavior

    Article • Heat Transfer, February 2020, Wiley

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

68. 
    Investigation of the three-dimensional structure, pressure drop, and heat transfer characteristics of the thermohydraulic flow in a circular pipe with different twisted-tape geometrical configurations

    Article • Journal of Thermal Analysis and Calorimetry, January 2020, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

69. 
    Detection of Cavitation Phenomenon within a Centrifugal Pump Based on Vibration Analysis Technique in both Time and Frequency Domains

    Article • Experimental Techniques, January 2020, Springer Science + Business Media

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

70. 
    EXPERIMENTAL INVESTIGATION OF CAVITATION CHARACTERISTICS WITHIN A CENTRIFUGAL PUMP BASED ON ACOUSTIC ANALYSIS TECHNIQUE

    Article • International Journal of Fluid Mechanics Research, January 2020, Begell House

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

71. 
    Numerical Investigations of Transient Flow Characteristic in Axial Flow Pump and Pressure Fluctuation Analysis Based on the CFD Technique

    Article • Journal of Engineering Science and Technology Review, December 2019, Eastern Macedonia and Thrace Institute of Technology

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

72. 
    Investigation of fluid field analysis, characteristics of pressure drop and improvement of heat transfer in three-dimensional circular corrugated pipes

    Article • Journal of Energy Storage, December 2019, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

73. 
    An Experimental Study on Vibration Signatures for Detecting Incipient Cavitation in Centrifugal Pumps Based on Envelope Spectrum Analysis

    Article • Journal of Applied Fluid Mechanics, November 2019, Armenian Green Publishing Co.

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

74. 
    Numerical Investigation of Flow Field Behaviour and Pressure Fluctuations within an Axial Flow Pump under Transient Flow Pattern Based on CFD Analysis Method

    Article • Journal of Physics Conference Series, July 2019, Institute of Physics Publishing

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

75. 
    Experimental investigation of using kerosene-biodiesel blend as an alternative fuel in diesel engines

    Article • Journal of Physics Conference Series, July 2019, Institute of Physics Publishing

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

76. 
    Investigation of effect of pump rotational speed on performance and detection of cavitation within a centrifugal pump using vibration analysis

    Article • Heliyon, June 2019, Elsevier

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

77. 
    Effects of Different Turbulence Models on Three-Dimensional Unsteady Cavitating Flows in the Centrifugal Pump and Performance Prediction

    Article • International Journal of Nonlinear Sciences and Numerical Simulation, May 2019, De Gruyter

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi

78. 
    Monitoring the Performance of Centrifugal Pump under Single-Phase and Cavitation Condition: A CFD Analysis of the Number of Impeller Blades

    Article • Journal of Applied Fluid Mechanics, March 2019, Armenian Green Publishing Co.

    Asst. Prof. Dr. Ahmed Ramadhan Al-Obaidi