Deepika Karunanithi | Rajiv Gandhi University of Health Sciences (original) (raw)
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Okinawa Institute of Science and Technology
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Papers by Deepika Karunanithi
49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2011
A computational parametric study designed to examine the plausibility of an external body force g... more A computational parametric study designed to examine the plausibility of an external body force generated by active means, such as a plasma actuator, as a way of controlling a Laminar Separation Bubble (LSB) over an airfoil at low Reynolds numbers was conducted. Computational Fluid Dynamics (CFD) was employed to characterize the effect that a body force, localized to a small region tangent to the airfoil surface, might have on an LSB. In this study, the effects of altering the strength and location of the "actuator" on the size and location of the LSB and on the aerodynamic performance of the airfoil were observed. It was found that the body force, when properly located and with sufficient magnitude, could effectively eliminate the LSB. Additionally, it was found that by eliminating the LSB, the aerodynamic efficiency of the airfoil could be improved by as much as 60%. Thus, it was determined that such a system may indeed be an effective measure of reducing or eliminating the negative effects associated with LSBs at low Reynolds numbers, making the strategy an excellent candidate for future experimental research regarding this topic. Nomenclature α Airfoil angle of attack (deg) ρ ∞ Free-stream density (kg/m 3) a ∞ Free-stream speed of sound (m/s) c Airfoil chord (m) C p Pressure Coefficient = p−p∞ 1/2ρ∞V 2 ∞ f d Force magnitude per unit volume (N/m 3) f nd Dimensionless force per unit volume = f d c ρ∞V 2 ∞ M ∞ Free-stream Mach number = V∞ a∞ Re Reynolds number = ρ∞V∞c µ V ∞ Free-stream velocity (m/s) x Chord-wise position with respect to airfoil leading edge (c) X s Chord-wise position with respect to nominal LSB separation point (c) y Position with respect to airfoil chord (normal to x)
Journal of Indian Society of Periodontology
To evaluate variations in fibrin network patterns of the platelet-rich fibrin (PRF) in different ... more To evaluate variations in fibrin network patterns of the platelet-rich fibrin (PRF) in different age groups. Ninety-five patients were divided into three age groups: Group 1: (20-39 years); Group 2: (40-59 years); and Group 3: (60 years and above). PRF was prepared from blood samples of all patients and were subjected to cell block cytology method of histological analysis and slides were prepared to histologically assess the age-related changes in (i) fibrin network patterns in terms of density and (ii) entrapment of platelets and white blood cells (WBCs) within fibrin meshwork. Two types of fibrin network pattern arrangements noticed: Dense and loose types in three age groups. However, there was a noticeable decrease in the dense type of fibrin network with progressing age and increase in the loose type of fibrin arrangement. Furthermore, variation in a number of platelets and WBCs entrapped within fibrin network in relation to age was noticed. From the current study it can be conc...
49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2011
A computational parametric study designed to examine the plausibility of an external body force g... more A computational parametric study designed to examine the plausibility of an external body force generated by active means, such as a plasma actuator, as a way of controlling a Laminar Separation Bubble (LSB) over an airfoil at low Reynolds numbers was conducted. Computational Fluid Dynamics (CFD) was employed to characterize the effect that a body force, localized to a small region tangent to the airfoil surface, might have on an LSB. In this study, the effects of altering the strength and location of the "actuator" on the size and location of the LSB and on the aerodynamic performance of the airfoil were observed. It was found that the body force, when properly located and with sufficient magnitude, could effectively eliminate the LSB. Additionally, it was found that by eliminating the LSB, the aerodynamic efficiency of the airfoil could be improved by as much as 60%. Thus, it was determined that such a system may indeed be an effective measure of reducing or eliminating the negative effects associated with LSBs at low Reynolds numbers, making the strategy an excellent candidate for future experimental research regarding this topic. Nomenclature α Airfoil angle of attack (deg) ρ ∞ Free-stream density (kg/m 3) a ∞ Free-stream speed of sound (m/s) c Airfoil chord (m) C p Pressure Coefficient = p−p∞ 1/2ρ∞V 2 ∞ f d Force magnitude per unit volume (N/m 3) f nd Dimensionless force per unit volume = f d c ρ∞V 2 ∞ M ∞ Free-stream Mach number = V∞ a∞ Re Reynolds number = ρ∞V∞c µ V ∞ Free-stream velocity (m/s) x Chord-wise position with respect to airfoil leading edge (c) X s Chord-wise position with respect to nominal LSB separation point (c) y Position with respect to airfoil chord (normal to x)
Journal of Indian Society of Periodontology
To evaluate variations in fibrin network patterns of the platelet-rich fibrin (PRF) in different ... more To evaluate variations in fibrin network patterns of the platelet-rich fibrin (PRF) in different age groups. Ninety-five patients were divided into three age groups: Group 1: (20-39 years); Group 2: (40-59 years); and Group 3: (60 years and above). PRF was prepared from blood samples of all patients and were subjected to cell block cytology method of histological analysis and slides were prepared to histologically assess the age-related changes in (i) fibrin network patterns in terms of density and (ii) entrapment of platelets and white blood cells (WBCs) within fibrin meshwork. Two types of fibrin network pattern arrangements noticed: Dense and loose types in three age groups. However, there was a noticeable decrease in the dense type of fibrin network with progressing age and increase in the loose type of fibrin arrangement. Furthermore, variation in a number of platelets and WBCs entrapped within fibrin network in relation to age was noticed. From the current study it can be conc...