My congratulations on the upcoming event that celebrates the birth of the Hindu Goddess Dhūmāvatī. We should observe Dhūmāvatī first and foremost as a Goddess with the profound symbolism. Officially she doesn’t have her own Bhairava, because she and he are one and the same. She is associated with the upper cakras, the upper āmnāya (transmission of knowledge), which leads to mokṣa and is the essence of all āmnāyas. Her energy is associated with the renunciation from the world, with nirvikalpa–samādhi. Dhūmāvatī symbolises the moment when the power of kuṇḍalinī rises upwards, reaches ājñā-cakra and then dissolves into Paramaśiva. I will give you an interesting excerpt from the Siddha-siddhānta-paddhati, which describes the practices involved in realisation of various guidelines in yoga. In describing of the inner lakṣya, I suggest that you pay attention to this passage from the second part:

अथवा ललाटोर्ध्वे कोलोलाटमण्डपे स्फुरत्काराकारं लक्षयेत्।
athavā lalāṭordhve kololāṭamaṇḍape sphuratkārākāraṃ lakṣayet।

Or, one must contemplate a pulsating flash in space above the forehead.

अथवा भ्रमरगुहामध्ये आरक्तभ्रमराकारं लक्षयेत्।
athavā bhramaraguhāmadhye āraktabhramarākāraṃ lakṣayet।

Or, contemplate an image like a red bee in the bhramara-guha (bee cave) area.

अथवा कर्णद्वयं तर्जनीभ्यां निरोधयेत् ततः शिरोमध्ये धूं धूं कारं नादं श्रृणोति।
athavā karṇadvayaṃ tarjanībhyāṃ nirodhayet tataḥ śiromadhye dhūṃ dhūṃ kāraṃ nādaṃ śrṛṇoti।

Or, one should cover both ears with two thumbs and then listen to the sound “dhūṃ dhūṃ” धूं धूं (Dhūmāvatī bīja-mantra) in the middle of the head.

अथवा चक्षुर्मध्ये नीलज्योतिरूपं पुतल्याकारं लक्षयेदित्यन्तर्लक्ष्यम् ॥२७॥
athavā cakṣurmadhye nīlajyotirūpaṃ putalyākāraṃ lakṣayedityantarlakṣyam ॥27॥

Or, between the eyes, contemplate a glowing blue image. These are the inner guidelines of contemplation.

Blue is often associated with various types of Goddesses, it can represent the energy of Tārā (Nīlasaraswati), Śyāmalā (Mātaṅgī), Kālī, which in many ways could also correspond to Dhūmāvatī, as blue slightly resembles the color of smoke. In fact, bījas, Dhūmāvatī mantras, her vibrations in the head, which lead to the dissolution are described here. I will share some personal experience. Although many believe that she represents a withering power, I think that such a view is deceptive and the worldly person does not see the most important thing about her. This Goddess, although depicted as a symbol which is close to the end of life, is also a symbol of the full unfolding of life’s whole potential. It’s a total bloom that, for many, seems daunting and ominous. Its withering contains an infinite blossoming of energy, it is kuṇḍalinī at the very peak of unfolding into infinity. Dhūmāvatī eliminates two kinds of fear, which are essentially one – the fear of life-death.