Aashish Bhardwaj

About Aashish Bhardwaj

Aashish Bhardwaj, With an exceptional h-index of 3 and a recent h-index of 3 (since 2020), a distinguished researcher at Indian Institute of Technology Ropar, specializes in the field of Computational Mechanics.

His recent articles reflect a diverse array of research interests and contributions to the field:

Thermal Transport in Molecular Forests

On the possible explanation of the reduced thermal conductivity in molecular forests

Influence of flexure and crowding on nanoscale thermal transport

Reduced thermal conductivity in molecular forests

Aashish Bhardwaj Information

University

Indian Institute of Technology Ropar

Position

University of British Columbia

Citations(all)

23

Citations(since 2020)

22

Cited By

10

hIndex(all)

3

hIndex(since 2020)

3

i10Index(all)

1

i10Index(since 2020)

1

Email

University Profile Page

Indian Institute of Technology Ropar

Aashish Bhardwaj Skills & Research Interests

Computational Mechanics

Top articles of Aashish Bhardwaj

Thermal Transport in Molecular Forests

Authors

Aashish Bhardwaj,A Srikantha Phani,Alireza Nojeh,Debashish Mukherji

Journal

ACS nano

Published Date

2021/1/15

Heat propagation in quasi-one-dimensional materials (Q1DMs) often appears puzzling. For example, while an isolated Q1DM, such as a nanowire, a carbon nanotube, or a polymer, can exhibit a high thermal conductivity κ, forests of the same materials can show a reduction in κ. Until now, the complex structures of these assemblies have hindered the emergence of a clear molecular picture for this intriguing phenomenon. We combine coarse-grained simulations with concepts known from polymer physics and thermal transport to unveil a generic microscopic picture of κ reduction in molecular forests. We show that a delicate balance among the persistence length of the Q1DM, the segment orientations, and the flexural vibrations governs the reduction in κ.

On the possible explanation of the reduced thermal conductivity in molecular forests

Authors

Debashish Mukherji,Aashish Bhardwaj,Srikantha Phani,Alireza Nojeh

Journal

APS March Meeting Abstracts

Published Date

2021

The heat propagation in quasi-one dimensional materials (Q1DMs) often appears paradoxical. For example, an isolated Q1DM, such as a nanowire, carbon nanotube, or polymer, can exhibit a high thermal conductivity κ, assemblies of the same materials show a reduction in κ. Here, the complex structures of these assemblies have hindered the emergence of a clear molecular picture of this intriguing phenomenon. We combine multiscale simulation with the concepts known from polymer physics and thermal transport to unveil a generic picture of κ reduction in molecular forests. We show that a delicate balance between the segment orientations, the persistence length of the Q1DM and the flexural vibrations govern the behavior of κ.

Influence of flexure and crowding on nanoscale thermal transport

Authors

Aashish Bhardwaj

Published Date

2020

Nanoscale thermal transport has been studied by scientists for decades. Low dimensional materials have shown two significant characteristics-(1) Thermal conductivity (κ) can be dependent on the size of the system,(2) A significant reduction in κ has been observed in an array-like arrangement. Thus, it is essential to understand the mechanism to tailor material properties for different applications. Fourier’s law is an empirical relation between average thermal flux and temperature gradient. It indicates κ is an intrinsic material property, but studies have shown that it breaks down in low-dimensional systems. The heat flux (J) depends on the size of the system (N) by the relation J∝ N α− 1. Traditionally, 1D studies have mostly focused on the effect of two-body interactions on κ. In this thesis, we study the effect of multibody interactions in the presence of two-body interactions on thermal transport. We use Nℓ (number of persistence lengths) to define system size and study the asymptotic limit of NJ. The transition from ballistic to superdiffusive behaviour was observed near 100 Nℓ in the ordered systems. In contrast, disordered systems showed only superdiffusive transport. Coherent wave patterns emerged as thermal carriers in superdiffusive regimes. Further, modelling crowding as transverse pinning, we observe a non-monotonous transition from superdiffusive to ballistic behaviour as we increased the crowding. While the single chain models have been extensively studied to understand the length dependence of κ, simulation studies on their bundles and forests are very few. One such example is the experimentally observed reduced heat conduction …

Reduced thermal conductivity in molecular forests

Authors

Aashish Bhardwaj,A Srikantha Phani,Alireza Nojeh,Debashish Mukherji

Journal

arXiv preprint arXiv:2005.10685

Published Date

2020/5/21

Heat propagation in quasi-one dimensional materials (Q1DMs) often appears paradoxical. While an isolated Q1DM, such as a nanowire, carbon nanotube, or polymer, can exhibit a high thermal conductivity \k{appa}, forests of the same materials show a reduction in \k{appa}. Here, the complex structures of these assemblies have hindered the emergence of a clear molecular picture of this intriguing phenomenon. We combine multiscale (coarse-grained) simulation with the concepts known from polymer physics and thermal transport to unveil a generic (microscopic) picture of \k{appa} reduction in molecular forests. We show that a delicate balance between the bond orientations, the persistence length of the Q1DM and the flexural vibrations govern the knock-down of \k{appa}.

See List of Professors in Aashish Bhardwaj University(Indian Institute of Technology Ropar)

Aashish Bhardwaj FAQs

What is Aashish Bhardwaj's h-index at Indian Institute of Technology Ropar?

The h-index of Aashish Bhardwaj has been 3 since 2020 and 3 in total.

What are Aashish Bhardwaj's top articles?

The articles with the titles of

Thermal Transport in Molecular Forests

On the possible explanation of the reduced thermal conductivity in molecular forests

Influence of flexure and crowding on nanoscale thermal transport

Reduced thermal conductivity in molecular forests

are the top articles of Aashish Bhardwaj at Indian Institute of Technology Ropar.

What are Aashish Bhardwaj's research interests?

The research interests of Aashish Bhardwaj are: Computational Mechanics

What is Aashish Bhardwaj's total number of citations?

Aashish Bhardwaj has 23 citations in total.

What are the co-authors of Aashish Bhardwaj?

The co-authors of Aashish Bhardwaj are Dr. Rakesh Kumar Maurya.

    Co-Authors

    H-index: 26
    Dr. Rakesh Kumar Maurya

    Dr. Rakesh Kumar Maurya

    Indian Institute of Technology Ropar

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