Ashish Arote - Academia.edu (original) (raw)

Papers by Ashish Arote

Sādhanā, 2021

The fidelity of an advection-dominant numerical solution is significantly affected by the order o... more The fidelity of an advection-dominant numerical solution is significantly affected by the order of approximation applied for the given scalar. Numerical schemes that apply this approximation are generally prone to dissipative and dispersive errors while capturing sharp discontinuities in the scalar values. Hence, the present study introduces the Fromm-scheme-based blending formulation for two blended schemes that demonstrate the accuracy and monotonicity while capturing the discontinuity in the numerical solution. The present study demonstrates the spectral analysis for the stability and accuracy of these blended schemes. The proposed blended schemes are applied to the pure advection problems and are compared to their constituent higher-order schemes and other blended schemes. Furthermore, these schemes are also applied over the lid driven cavity and one-dimensional dam break problems to estimate their performance over an unknown velocity field.

Physics of Fluids, 2021

Understanding the behavior of oscillating liquid jets in tandem is vital for improving the effica... more Understanding the behavior of oscillating liquid jets in tandem is vital for improving the efficacy of numerous industrial applications. An interpretation of their behavior in the terms of development, associated instability, and interactions when used in tandem remains unclear. Therefore, the present study reports the numerical investigations on spatially oscillating liquid jets in tandem. Numerical simulations are carried out by solving Navier–Stokes equations coupled with volume of fluid method to track the air–water interface. The development of the tandem jets, growth in amplitude of oscillation, and interaction between the coherent structures is analyzed for both synchronous and asynchronous liquid jets in tandem. Moreover, the effect of nozzle spacing on these parameters is also reported in the present study. It is demonstrated that a decrease in the nozzle spacing destabilizes these jets and promotes an early merging between them. This decrease in nozzle spacing also improves the stream-wise entrainment of the surrounding fluid. Furthermore, synchronous jets are found to be more stable as compared to asynchronous jets owing to a relatively constant spacing between the two jets. Asynchronous jets provide better fluid entrainment than synchronous jets owing to their higher amplitude of oscillation and stronger jet front interactions. Moreover, it is demonstrated that these interactions at the jet front give rise to a staggered vortex front in asynchronous jets, whereas the vortex front remains symmetric in synchronous jets.

Lecture Notes in Mechanical Engineering, 2021

The present work demonstrates the qualitative and quantitative comparison between high-resolution... more The present work demonstrates the qualitative and quantitative comparison between high-resolution algebraic interface-capturing schemes applied to volume of fluid (VOF) method. Basic Compressive Interface-Capturing Scheme for Arbitrary Meshes (B-CICSAM), Modified Compressive Interface-Capturing Scheme for Arbitrary Meshes (M-CICSAM), Flux-Blending Interface-Capturing Scheme (FBICS) and Cubic Upwind Interpolation Based Blending Scheme (CUIBS) are compared in the present study. Comparisons are based on the L 2 norm of the mass loss and topological accuracies shown by the above schemes when subjected to the known flow field causing shearing and deformation of the fluid interface. The present study also demonstrates the performance of these schemes when applied to real-life problems such as Rayleigh-Taylor instability. It is observed that FBICS is accurate and robust as compared to other methods, whereas M-CICSAM displays comparatively similar accuracy at lower Courant values but by being computationally efficient. On the other hand, it was observed that CICSAM and CUIBS display strong dependency over the Courant values.

IOP Conference Series: Materials Science and Engineering, 2021

The liquid jet under certain conditions when perturbed will lead to instability. The understandin... more The liquid jet under certain conditions when perturbed will lead to instability. The understanding about an effect of confinement on these jets is still obscure. Hence, numerical investigations are reported in the present study for two phase spatially oscillating planar jet in a quiescent air under the confined conditions. Simulations are performed by solving the Navier-Stokes equations using volume of fluid (VOF) method to track the air-water interface. In the present study an oscillating jet is subjected to various confinement ratios (CR) to understand the jet behaviour under such conditions. It is demonstrated that the amplitude of oscillation increases as the confinement ratio decreases. This behaviour is a result of increased intensity of vortex rotation at each jet peaks as the confinement ratio increases. Moreover, it is also demonstrated that the vortex structure interact with the side-walls and disturb the incoming flow causing non-linear growth of oscillations leading to p...

Journal of Flow Visualization and Image Processing

Sadhana-academy Proceedings in Engineering Sciences, 2021

The fidelity of an advection-dominant numerical solution is significantly affected by the order o... more The fidelity of an advection-dominant numerical solution is significantly affected by the order of approximation applied for the given scalar. Numerical schemes that apply this approximation are generally prone to dissipative and dispersive errors while capturing sharp discontinuities in the scalar values. Hence, the present study introduces the Fromm-scheme-based blending formulation for two blended schemes that demonstrate the accuracy and monotonicity while capturing the discontinuity in the numerical solution. The present study demonstrates the spectral analysis for the stability and accuracy of these blended schemes. The proposed blended schemes are applied to the pure advection problems and are compared to their constituent higher-order schemes and other blended schemes. Furthermore, these schemes are also applied over the lid driven cavity and one-dimensional dam break problems to estimate their performance over an unknown velocity field.

Lecture Notes in Mechanical Engineering, 2021

The present work demonstrates the qualitative and quantitative comparison between high-resolution... more The present work demonstrates the qualitative and quantitative comparison between high-resolution algebraic interface-capturing schemes applied to volume of fluid (VOF) method. Basic Compressive Interface-Capturing Scheme for Arbitrary Meshes (B-CICSAM), Modified Compressive Interface-Capturing Scheme for Arbitrary Meshes (M-CICSAM), Flux-Blending Interface-Capturing Scheme (FBICS) and Cubic Upwind Interpolation Based Blending Scheme (CUIBS) are compared in the present study. Comparisons are based on the L 2 norm of the mass loss and topological accuracies shown by the above schemes when subjected to the known flow field causing shearing and deformation of the fluid interface. The present study also demonstrates the performance of these schemes when applied to real-life problems such as Rayleigh-Taylor instability. It is observed that FBICS is accurate and robust as compared to other methods, whereas M-CICSAM displays comparatively similar accuracy at lower Courant values but by being computationally efficient. On the other hand, it was observed that CICSAM and CUIBS display strong dependency over the Courant values.

Numerical Heat Transfer, Part B: Fundamentals

Abstract A Compressive volume-of-fluid (VOF) schemes exhibits numerical diffusion which inhibit t... more Abstract A Compressive volume-of-fluid (VOF) schemes exhibits numerical diffusion which inhibit them in obtaining a numerically sharp and wrinkle free description of fluid interface which is vital for understanding the complex interfacial dynamics. Therefore, the present study introduces a novel compressive VOF scheme capable of capturing sharp abrupt interfaces at stringent Courant conditions while demonstrating excellent computational efficiency. Moreover, the proposed method is also able to effectively conserve the fluid mass even when subjected to an involved flow field. The performance of the proposed method is evaluated against several canonical pure advection test problems and the results are compared with four established compressive VOF schemes. The quantitative and qualitative analysis of the numerical results assert the ascendancy of the newly introduced scheme. Furthermore, the method exhibits excellent agreement with the literature when applied to the high density ratio problems which involve complex interface topologies dominated by viscous and surface tension forces.

Physics of Fluids, 2021

Understanding the behavior of oscillating liquid jets in tandem is vital for improving the effica... more Understanding the behavior of oscillating liquid jets in tandem is vital for improving the efficacy of numerous industrial applications. An interpretation of their behavior in the terms of development, associated instability, and interactions when used in tandem remains unclear. Therefore, the present study reports the numerical investigations on spatially oscillating liquid jets in tandem. Numerical simulations are carried out by solving Navier–Stokes equations coupled with volume of fluid method to track the air–water interface. The development of the tandem jets, growth in amplitude of oscillation, and interaction between the coherent structures is analyzed for both synchronous and asynchronous liquid jets in tandem. Moreover, the effect of nozzle spacing on these parameters is also reported in the present study. It is demonstrated that a decrease in the nozzle spacing destabilizes these jets and promotes an early merging between them. This decrease in nozzle spacing also improve...

The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Und... more The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Understanding the causes and consequences of such a behavior is still obscure. Hence, numerical investigations are reported in the present study for a two phase spatially oscillating planar jet in a quiescent air. Simulations are performed by solving the Navier-Stokes equations and using the volume of fluid method to track the air-water interface. It is demonstrated that an increase in amplitude of oscillation is caused due to the formation of a low pressure region created by the vortical structures in air near the leading edge of the jet when deflected. This two way coupling between air and water is analyzed with the help of enstrophy, divergence of the Lamb vector, and vortex forces. It is found through a parametric study that surface tension and viscosity stabilize the perturbations in an oscillating planar jet. On the other hand, an increase in Froude number (Fr) initially leads to an augmentation of perturbation amplitude and later causes its damping when surface tension forces become dominant. The numerical analysis for different inlet velocity profiles establishes that the jet is more stable when subjected to a parabolic inlet velocity profile as compared to a uniform profile due to lower relative velocity at the interface. The present work also reveals the role of capillary instability in addition to Kelvin-Helmholtz and Rayleigh-Taylor instabilities that induce primary breakup in the jet.

The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Und... more The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Understanding the causes and consequences of such a behavior is still obscure. Hence, numerical investigations are reported in the present study for a two phase spatially oscillating planar jet in a quiescent air. Simulations are performed by solving the Navier-Stokes equations and using the volume of fluid method to track the air-water interface. It is demonstrated that an increase in amplitude of oscillation is caused due to the formation of a low pressure region created by the vortical structures in air near the leading edge of the jet when deflected. This two way coupling between air and water is analyzed with the help of enstrophy, divergence of the Lamb vector, and vortex forces. It is found through a parametric study that surface tension and viscosity stabilize the perturbations in an oscillating planar jet. On the other hand, an increase in Froude number (Fr) initially leads to an augmentation of perturbation amplitude and later causes its damping when surface tension forces become dominant. The numerical analysis for different inlet velocity profiles establishes that the jet is more stable when subjected to a parabolic inlet velocity profile as compared to a uniform profile due to lower relative velocity at the interface. The present work also reveals the role of capillary instability in addition to Kelvin-Helmholtz and Rayleigh-Taylor instabilities that induce primary breakup in the jet.

The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Und... more The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Understanding the causes and consequences of such a behavior is still obscure. Hence, numerical investigations are reported in the present study for a two phase spatially oscillating planar jet in a quiescent air. Simulations are performed by solving the Navier-Stokes equations and using the volume of fluid method to track the air-water interface. It is demonstrated that an increase in amplitude of oscillation is caused due to the formation of a low pressure region created by the vortical structures in air near the leading edge of the jet when deflected. This two way coupling between air and water is analyzed with the help of enstrophy, divergence of the Lamb vector, and vortex forces. It is found through a parametric study that surface tension and viscosity stabilize the perturbations in an oscillating planar jet. On the other hand, an increase in Froude number (Fr) initially leads to an augmentation of perturbation amplitude and later causes its damping when surface tension forces become dominant. The numerical analysis for different inlet velocity profiles establishes that the jet is more stable when subjected to a parabolic inlet velocity profile as compared to a uniform profile due to lower relative velocity at the interface. The present work also reveals the role of capillary instability in addition to Kelvin-Helmholtz and Rayleigh-Taylor instabilities that induce primary breakup in the jet.

The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Und... more The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Understanding the causes and consequences of such a behavior is still obscure. Hence, numerical investigations are reported in the present study for a two phase spatially oscillating planar jet in a quiescent air. Simulations are performed by solving the Navier-Stokes equations and using the volume of fluid method to track the air-water interface. It is demonstrated that an increase in amplitude of oscillation is caused due to the formation of a low pressure region created by the vortical structures in air near the leading edge of the jet when deflected. This two way coupling between air and water is analyzed with the help of enstrophy, divergence of the Lamb vector, and vortex forces. It is found through a parametric study that surface tension and viscosity stabilize the perturbations in an oscillating planar jet. On the other hand, an increase in Froude number (Fr) initially leads to an augmentation of perturbation amplitude and later causes its damping when surface tension forces become dominant. The numerical analysis for different inlet velocity profiles establishes that the jet is more stable when subjected to a parabolic inlet velocity profile as compared to a uniform profile due to lower relative velocity at the interface. The present work also reveals the role of capillary instability in addition to Kelvin-Helmholtz and Rayleigh-Taylor instabilities that induce primary breakup in the jet.

Sādhanā, 2021

The fidelity of an advection-dominant numerical solution is significantly affected by the order o... more The fidelity of an advection-dominant numerical solution is significantly affected by the order of approximation applied for the given scalar. Numerical schemes that apply this approximation are generally prone to dissipative and dispersive errors while capturing sharp discontinuities in the scalar values. Hence, the present study introduces the Fromm-scheme-based blending formulation for two blended schemes that demonstrate the accuracy and monotonicity while capturing the discontinuity in the numerical solution. The present study demonstrates the spectral analysis for the stability and accuracy of these blended schemes. The proposed blended schemes are applied to the pure advection problems and are compared to their constituent higher-order schemes and other blended schemes. Furthermore, these schemes are also applied over the lid driven cavity and one-dimensional dam break problems to estimate their performance over an unknown velocity field.

Physics of Fluids, 2021

Understanding the behavior of oscillating liquid jets in tandem is vital for improving the effica... more Understanding the behavior of oscillating liquid jets in tandem is vital for improving the efficacy of numerous industrial applications. An interpretation of their behavior in the terms of development, associated instability, and interactions when used in tandem remains unclear. Therefore, the present study reports the numerical investigations on spatially oscillating liquid jets in tandem. Numerical simulations are carried out by solving Navier–Stokes equations coupled with volume of fluid method to track the air–water interface. The development of the tandem jets, growth in amplitude of oscillation, and interaction between the coherent structures is analyzed for both synchronous and asynchronous liquid jets in tandem. Moreover, the effect of nozzle spacing on these parameters is also reported in the present study. It is demonstrated that a decrease in the nozzle spacing destabilizes these jets and promotes an early merging between them. This decrease in nozzle spacing also improves the stream-wise entrainment of the surrounding fluid. Furthermore, synchronous jets are found to be more stable as compared to asynchronous jets owing to a relatively constant spacing between the two jets. Asynchronous jets provide better fluid entrainment than synchronous jets owing to their higher amplitude of oscillation and stronger jet front interactions. Moreover, it is demonstrated that these interactions at the jet front give rise to a staggered vortex front in asynchronous jets, whereas the vortex front remains symmetric in synchronous jets.

Lecture Notes in Mechanical Engineering, 2021

The present work demonstrates the qualitative and quantitative comparison between high-resolution... more The present work demonstrates the qualitative and quantitative comparison between high-resolution algebraic interface-capturing schemes applied to volume of fluid (VOF) method. Basic Compressive Interface-Capturing Scheme for Arbitrary Meshes (B-CICSAM), Modified Compressive Interface-Capturing Scheme for Arbitrary Meshes (M-CICSAM), Flux-Blending Interface-Capturing Scheme (FBICS) and Cubic Upwind Interpolation Based Blending Scheme (CUIBS) are compared in the present study. Comparisons are based on the L 2 norm of the mass loss and topological accuracies shown by the above schemes when subjected to the known flow field causing shearing and deformation of the fluid interface. The present study also demonstrates the performance of these schemes when applied to real-life problems such as Rayleigh-Taylor instability. It is observed that FBICS is accurate and robust as compared to other methods, whereas M-CICSAM displays comparatively similar accuracy at lower Courant values but by being computationally efficient. On the other hand, it was observed that CICSAM and CUIBS display strong dependency over the Courant values.

IOP Conference Series: Materials Science and Engineering, 2021

The liquid jet under certain conditions when perturbed will lead to instability. The understandin... more The liquid jet under certain conditions when perturbed will lead to instability. The understanding about an effect of confinement on these jets is still obscure. Hence, numerical investigations are reported in the present study for two phase spatially oscillating planar jet in a quiescent air under the confined conditions. Simulations are performed by solving the Navier-Stokes equations using volume of fluid (VOF) method to track the air-water interface. In the present study an oscillating jet is subjected to various confinement ratios (CR) to understand the jet behaviour under such conditions. It is demonstrated that the amplitude of oscillation increases as the confinement ratio decreases. This behaviour is a result of increased intensity of vortex rotation at each jet peaks as the confinement ratio increases. Moreover, it is also demonstrated that the vortex structure interact with the side-walls and disturb the incoming flow causing non-linear growth of oscillations leading to p...

Journal of Flow Visualization and Image Processing

Sadhana-academy Proceedings in Engineering Sciences, 2021

The fidelity of an advection-dominant numerical solution is significantly affected by the order o... more The fidelity of an advection-dominant numerical solution is significantly affected by the order of approximation applied for the given scalar. Numerical schemes that apply this approximation are generally prone to dissipative and dispersive errors while capturing sharp discontinuities in the scalar values. Hence, the present study introduces the Fromm-scheme-based blending formulation for two blended schemes that demonstrate the accuracy and monotonicity while capturing the discontinuity in the numerical solution. The present study demonstrates the spectral analysis for the stability and accuracy of these blended schemes. The proposed blended schemes are applied to the pure advection problems and are compared to their constituent higher-order schemes and other blended schemes. Furthermore, these schemes are also applied over the lid driven cavity and one-dimensional dam break problems to estimate their performance over an unknown velocity field.

Lecture Notes in Mechanical Engineering, 2021

The present work demonstrates the qualitative and quantitative comparison between high-resolution... more The present work demonstrates the qualitative and quantitative comparison between high-resolution algebraic interface-capturing schemes applied to volume of fluid (VOF) method. Basic Compressive Interface-Capturing Scheme for Arbitrary Meshes (B-CICSAM), Modified Compressive Interface-Capturing Scheme for Arbitrary Meshes (M-CICSAM), Flux-Blending Interface-Capturing Scheme (FBICS) and Cubic Upwind Interpolation Based Blending Scheme (CUIBS) are compared in the present study. Comparisons are based on the L 2 norm of the mass loss and topological accuracies shown by the above schemes when subjected to the known flow field causing shearing and deformation of the fluid interface. The present study also demonstrates the performance of these schemes when applied to real-life problems such as Rayleigh-Taylor instability. It is observed that FBICS is accurate and robust as compared to other methods, whereas M-CICSAM displays comparatively similar accuracy at lower Courant values but by being computationally efficient. On the other hand, it was observed that CICSAM and CUIBS display strong dependency over the Courant values.

Numerical Heat Transfer, Part B: Fundamentals

Abstract A Compressive volume-of-fluid (VOF) schemes exhibits numerical diffusion which inhibit t... more Abstract A Compressive volume-of-fluid (VOF) schemes exhibits numerical diffusion which inhibit them in obtaining a numerically sharp and wrinkle free description of fluid interface which is vital for understanding the complex interfacial dynamics. Therefore, the present study introduces a novel compressive VOF scheme capable of capturing sharp abrupt interfaces at stringent Courant conditions while demonstrating excellent computational efficiency. Moreover, the proposed method is also able to effectively conserve the fluid mass even when subjected to an involved flow field. The performance of the proposed method is evaluated against several canonical pure advection test problems and the results are compared with four established compressive VOF schemes. The quantitative and qualitative analysis of the numerical results assert the ascendancy of the newly introduced scheme. Furthermore, the method exhibits excellent agreement with the literature when applied to the high density ratio problems which involve complex interface topologies dominated by viscous and surface tension forces.

Physics of Fluids, 2021

Understanding the behavior of oscillating liquid jets in tandem is vital for improving the effica... more Understanding the behavior of oscillating liquid jets in tandem is vital for improving the efficacy of numerous industrial applications. An interpretation of their behavior in the terms of development, associated instability, and interactions when used in tandem remains unclear. Therefore, the present study reports the numerical investigations on spatially oscillating liquid jets in tandem. Numerical simulations are carried out by solving Navier–Stokes equations coupled with volume of fluid method to track the air–water interface. The development of the tandem jets, growth in amplitude of oscillation, and interaction between the coherent structures is analyzed for both synchronous and asynchronous liquid jets in tandem. Moreover, the effect of nozzle spacing on these parameters is also reported in the present study. It is demonstrated that a decrease in the nozzle spacing destabilizes these jets and promotes an early merging between them. This decrease in nozzle spacing also improve...

The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Und... more The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Understanding the causes and consequences of such a behavior is still obscure. Hence, numerical investigations are reported in the present study for a two phase spatially oscillating planar jet in a quiescent air. Simulations are performed by solving the Navier-Stokes equations and using the volume of fluid method to track the air-water interface. It is demonstrated that an increase in amplitude of oscillation is caused due to the formation of a low pressure region created by the vortical structures in air near the leading edge of the jet when deflected. This two way coupling between air and water is analyzed with the help of enstrophy, divergence of the Lamb vector, and vortex forces. It is found through a parametric study that surface tension and viscosity stabilize the perturbations in an oscillating planar jet. On the other hand, an increase in Froude number (Fr) initially leads to an augmentation of perturbation amplitude and later causes its damping when surface tension forces become dominant. The numerical analysis for different inlet velocity profiles establishes that the jet is more stable when subjected to a parabolic inlet velocity profile as compared to a uniform profile due to lower relative velocity at the interface. The present work also reveals the role of capillary instability in addition to Kelvin-Helmholtz and Rayleigh-Taylor instabilities that induce primary breakup in the jet.

The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Und... more The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Understanding the causes and consequences of such a behavior is still obscure. Hence, numerical investigations are reported in the present study for a two phase spatially oscillating planar jet in a quiescent air. Simulations are performed by solving the Navier-Stokes equations and using the volume of fluid method to track the air-water interface. It is demonstrated that an increase in amplitude of oscillation is caused due to the formation of a low pressure region created by the vortical structures in air near the leading edge of the jet when deflected. This two way coupling between air and water is analyzed with the help of enstrophy, divergence of the Lamb vector, and vortex forces. It is found through a parametric study that surface tension and viscosity stabilize the perturbations in an oscillating planar jet. On the other hand, an increase in Froude number (Fr) initially leads to an augmentation of perturbation amplitude and later causes its damping when surface tension forces become dominant. The numerical analysis for different inlet velocity profiles establishes that the jet is more stable when subjected to a parabolic inlet velocity profile as compared to a uniform profile due to lower relative velocity at the interface. The present work also reveals the role of capillary instability in addition to Kelvin-Helmholtz and Rayleigh-Taylor instabilities that induce primary breakup in the jet.

The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Und... more The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Understanding the causes and consequences of such a behavior is still obscure. Hence, numerical investigations are reported in the present study for a two phase spatially oscillating planar jet in a quiescent air. Simulations are performed by solving the Navier-Stokes equations and using the volume of fluid method to track the air-water interface. It is demonstrated that an increase in amplitude of oscillation is caused due to the formation of a low pressure region created by the vortical structures in air near the leading edge of the jet when deflected. This two way coupling between air and water is analyzed with the help of enstrophy, divergence of the Lamb vector, and vortex forces. It is found through a parametric study that surface tension and viscosity stabilize the perturbations in an oscillating planar jet. On the other hand, an increase in Froude number (Fr) initially leads to an augmentation of perturbation amplitude and later causes its damping when surface tension forces become dominant. The numerical analysis for different inlet velocity profiles establishes that the jet is more stable when subjected to a parabolic inlet velocity profile as compared to a uniform profile due to lower relative velocity at the interface. The present work also reveals the role of capillary instability in addition to Kelvin-Helmholtz and Rayleigh-Taylor instabilities that induce primary breakup in the jet.

The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Und... more The liquid jet when perturbed sinusoidally will lead to instability under certain conditions. Understanding the causes and consequences of such a behavior is still obscure. Hence, numerical investigations are reported in the present study for a two phase spatially oscillating planar jet in a quiescent air. Simulations are performed by solving the Navier-Stokes equations and using the volume of fluid method to track the air-water interface. It is demonstrated that an increase in amplitude of oscillation is caused due to the formation of a low pressure region created by the vortical structures in air near the leading edge of the jet when deflected. This two way coupling between air and water is analyzed with the help of enstrophy, divergence of the Lamb vector, and vortex forces. It is found through a parametric study that surface tension and viscosity stabilize the perturbations in an oscillating planar jet. On the other hand, an increase in Froude number (Fr) initially leads to an augmentation of perturbation amplitude and later causes its damping when surface tension forces become dominant. The numerical analysis for different inlet velocity profiles establishes that the jet is more stable when subjected to a parabolic inlet velocity profile as compared to a uniform profile due to lower relative velocity at the interface. The present work also reveals the role of capillary instability in addition to Kelvin-Helmholtz and Rayleigh-Taylor instabilities that induce primary breakup in the jet.